taxonID	type	description	language	source
03AE87DC8673FFEC4FEEFA94FDA1B9B8.taxon	etymology	Etymology. Species named after its terra typica, Aguascalientes State of Mexico.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8673FFEC4FEEFA94FDA1B9B8.taxon	materials_examined	Type locality: Pond beside highway Villa Hidalgo city — Aguascalientes city, Aguascalientes state. Mexico, 0 4.09.1990, 21 ° 52 ' N; 102 ° 22 ' W. Type material. Holotype: parthenogenetic female from the type location, MGU Ml 120. Paratypes: 18 parthenogenetic females, 2 males, 1 juvenile male of instar II from the type location, MGU Ml 121; 15 parthenogenetic females from Pond in La Tacuacha farm. Aguascalientes, 0 4.09.1990, AYS; 1 parthenogenetic female from Mesa Montoro mountain, Calvillo, Aguascalientes, 0 6.10.1990, AYS; 7 parthenogenetic females from Pond beside Mesa Montoro. Calvillo, Aguascalientes, 0 6.10.1990, AYS; 19 parthenogenetic females from Pool in El Mitote farm. El Llano, Aguascalientes, 21.07.1988, AYS; 6 parthenogenetic females from Pond beside highway Aguascalientes city – SLP city, El Llano, Aguascalientes, 28.09.1991, AYS; 1 parthenogenetic female from Pond in Los Conos town, El Llano, Aguascalientes, 18.01.1989, AYS; 6 parthenogenetic females from Pond 1, beside El refugio pond, Asientos, Aguascalientes, 0 1.09.1990, AYS; 3 parthenogenetic females from Pond Laguna Seca. San Josй de Gracia, Aguascalientes, 19.01.1989, AYS; 1 parthenogenetic female from Pond near road to Los Arquitos town (in El Cariñan farm), Jesús María, Aguascalientes, 0 7.07.1988, AYS; 8 parthenogenetic females from Pond near La Tomatina town. Jesús María, Aguascalientes, 12.12.1989, AYS; 5 parthenogenetic females from Pond near Vista town. Jesús María, Aguascalientes, 0 7.10.1989, AYS; 18 parthenogenetic females, 1 male from Pond beside El refugio pond, Asientos, Aguascalientes, 0 1.09.1990, AYS; 17 parthenogenetic females from Pond 1, 1 km from El Refugio town, Asientos, Aguascalientes, 15.02.1991, AYS; 20 parthenogenetic females from Pond 1, near Túnel de Potrerillos town, Rincón de Romos, Aguascalientes, 11.08.1990, AYS; 7 parthenogenetic females from Pond 3, near Túnel de Potrerillos town. Rincón de Romos, Aguascalientes, 11.08.1990, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8673FFEC4FEEFA94FDA1B9B8.taxon	diagnosis	Diagnosis. Parthenogenetic female. Body regularly oval, of moderate height, maximum height at middle of body, in adults height / length ratio 0.59 – 0.63. Dorsal margin uniformly curved; postero-dorsal and postero-ventral angles broadly rounded. Body moderately compressed laterally. Postero-dorsal angle with about 80 short setules not organized in groups, and frequently with 1 – 2 small triangular denticles. Ventral margin with about 35 – 45 setae. Head shield with broadly rounded, slightly wavy posterior margin; rostrum short, broadly rounded. Three major head pores, connection between anterior and middle pore from well-developed, narrow interrupted; connection between middle and posterior pore absent; PP about 0.4 – 0.6 IP. Minute lateral head pores located about 1.2 – 1.3 IP distance from midline, at the level of anterior major head pore. Labrum of moderate size; labral keel wide with convex or wavy anterior margin, rounded apex and posterior margin without any setules. Postabdomen of moderate width, with almost parallel margins in postanal portion, length about 2.5 height. Distal margin straight to weakly convex, distal angle not prominent, broadly rounded. Dorsal margin with almost straight postanal portion and weakly concave anal portion. Distal part 1.7 – 1.8 times longer than preanal one, with postanal portion slightly longer than anal. Preanal angle well-defined, postanal angle not defined. Postabdomen with 8 – 9 well-developed marginal denticles of similar size, and with three-four groups of marginal setules on anal margin. Eight-ten lateral fascicles of setules, six-seven distalmost fascicles large, with distalmost seta of each fascicle 1.5 times longer than marginal denticlees. Postabdominal claw of moderate length, slightly longer than preanal portion of postabdomen. Basal spine about 0.3 of length of claw. Antennule of moderate size, with nine terminal aesthetascs. Antennal formula, setae 0 – 0 – 3 / 1 – 1 – 3, spines 1 – 0 – 1 / 0 – 0 – 1. Seta arising from basal segment of endopodite of same length with endopodite. Spine on basal segment of exopodite shorter than middle segment. Apical spines slightly longer than apical segments. Limb I with accessory seta 3 times shorter than ODL seta. IDL with three setae, seta 1 well-developed, about 1 / 3 length of seta 3. Scrapers of limb II of similar morphology. Exopodite of limb III with seven setae, seta 3 being longest. Exopodite IV with six setae. Exopodite V oval, with four setae, filter plate V absent. Epipodites IV and V with very short projections. Limb VI absent.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8673FFEC4FEEFA94FDA1B9B8.taxon	description	Male. Body of adult low oval, height / length ratio about 0.58. Both eye and ocellus of similar size with these of female, eye larger ocellus. Postabdomen short, strongly narrowing distally in anal portion, subrectangular in postanal portion. Gonopores located at the end of postabdomen, above the base of claws. Distal margin convex, distal angle broadly rounded. Preanal angle well-defined, prominent, postanal angle not defined. Distal part of postabdomen 1.2 – 1.3 times longer than preanal, anal and postanal portions which are of similar length. Wide clusters of short setules in place of marginal denticles. Lateral fascicles of setules same as in female. Postabdominal claw very short, 2.5 times shorter than preanal portion of postabdomen, basal spine very long, about 2 / 3 of claw length. Antennule with two lateral aesthetascs and about ten terminal ones. Male seta arising at 1 / 4 length from tip, about 1 / 5 of antennule length. Limb I with U-shaped, copulatory hook, its distal portion little longer than basal one. A group of about ten thick setules, followed by group of five thinner setules, located under copulatory brush on ventral face of limb. IDL seta 1 very small, setae 2 and 3 thinner and 1.5 times shorter than in female, male seta large, hook-like, almost as longer as seta 3. Size: In juvenile females of instar I, length is 0.26 – 0.27 mm, height 0.15 – 0.16 mm; in juvenile females of instar II, length 0.31 – 0.34 mm, height 0.18 – 0.20 mm; in adult female length 0.37 – 0.46 mm, height 0.22 – 0.28 mm. Length of single studied juvenile male of instar II was 0.34 mm, height 0.20 mm; in two studied adult males, length was 0.36 and 0.37 mm, height 0.21 mm in both specimens. Description. Parthenogenetic female. General. In lateral view body regularly oval, of moderate height (Figs. 1 A – C, 2 A – B), maximum height at middle of body, in adults height / length ratio 0.59 – 0.63. Dorsal margin uniformly curved; postero-dorsal and postero-ventral angles broadly rounded; posterior margin uniformly curved; ventral margin almost straight; antero-ventral angle rounded. Body moderately compressed laterally (Fig. 2 C). Valves without prominent sculpture. Ventral margin (Fig. 1 D) with about 35 – 45 setae, first 8 – 11 setae long, next 10 setae short, other setae of moderate length. Postero-dorsal angle (Figs. 1 E – H) bears about 80 short setules of similar length, not organized in groups, and frequently – 1 – 2 small triangular denticles. A row of about 80 setules along the posterior margin on inner side of valve. Head of moderate size, triangle-round in lateral view, rostrum short, pointing downward. Eye larger than ocellus. Distance from tip of rostrum to ocellus in adults slightly greater than that between ocellus and eye. Head shield with maximum width behind mandibular articulation, without any sculpture; rostrum short, broadly rounded; posterior margin of head shield broadly rounded, slightly wavy. Three major head pores (Figs. 1 I – J, 2 D – E), connection between anterior and middle pore from well-developed, narrow to interrupted, connection between middle and posterior pore absent; PP about 0.4 – 0.6 IP. Lateral head pores minute, located about 1.2 – 1.3 IP distance from midline, at the level of anterior major head pore. Labrum (Figs. 3 A – B) of moderate size; distal labral plate without setulation; labral keel wide (height about 1.5 width), with rounded apex; anterior margin of keel convex or wavy, posterior margin without any setules. Thorax two times longer than abdomen, dorsal surface of abdominal segments not saddle-shaped. Postabdomen of moderate width, with almost parallel margins in postanal portion, length about 2.5 height (Figs. 2 F – G, 3 C – D). Ventral margin weakly convex to straight. Basis of claws separated from distal margin by clear incision. Distal margin straight to weakly convex, distal angle not prominent, broadly rounded. Dorsal margin with distal part 1.7 – 1.8 times longer than preanal one, with postanal portion slightly longer than anal. Postanal portion of distal margin almost straight, anal portion weakly concave. Preanal angle well-defined, postanal angle not defined. 8 – 9 well-developed marginal denticles of similar size, most with one-two additional spinules near base of denticle, and with three-four groups of marginal setules on anal margin. Eight-ten lateral fascicles of setules, sixseven distalmost fascicles large, with distalmost seta of each fascicle 1.5 times longer than marginal denticles. Several additional fascicles above the main row in anal portion. Postabdominal claw (Fig. 2 H) of moderate length, slightly longer than preanal portion of postabdomen. Basal spine about 0.3 of length of claw. Antenna I (Fig. 3 E) of moderate size, length about 2.5 widht, with three clusters of long thin setules at anterior face. Antennular sensory seta slender, three times shorter than antennula, arising at 2 / 3 distance from the base. Nine terminal aesthetascs, two longest of them about 2 / 3 length of antennula. Antenna II relatively short (Figs. 2 I, 3 F – G). Antennal formula, setae 0 – 0 – 3 / 1 – 1 – 3, spines 1 – 0 – 1 / 0 – 0 – 1. Basal segment robust, branches of moderate length and width, basal segments of both branches 1.5 times longer than others. Seta arising from basal segment of endopodite of same length as endopodite. Seta arising from middle segment of endopodite of similar size of apical setae. Spine on basal segment of exopodite shorter than middle segment. Apical spines slightly longer than apical segments. Thoracic limbs: five pairs. Limb I (Figs. 4 A – B) of moderate size. Epipodite ovoid. Accessory seta about 1 / 3 length of ODL seta. ODL with a long seta, armed with minute setules in distal part. IDL with three setae and twothree clusters of small setules; setae 2 and 3 only slightly shorter than ODL seta, armed with large, thick setules in distal part; seta 1 of about 1 / 3 length of seta 3. Endite 3 with four setae of similar size. Endite 2 with three setae (d – f); seta f very long, 1.5 times longer than ODL seta. Endite 1 with two 2 - segmented setae, both setulated in distal part, without a flat seta (i) shifted to limb base. No inner setae on endites 1 – 2. Six rows of thin long setules on ventral face of limb. Two ejector hooks, one of them larger than the other. Maxillar process elongated, with a short seta. Limb II (Figs. 4 C – D). Exopodite elongated. Eight scraping setae (1 – 8), armed with spinules of similar shape, increasing in length distally. Distal armature of gnathobase with four elements. Filter plate with seven setae, the posteriormost seta three times shorter than others. Limb III (Figs. 4 E – F). Epipodite oval; exopodite subrectangular, with seven setae. Seta 3 being longest, setae 4 and 6 about 1 / 4 and 1 / 3 length of seta 3, respectively, other setae short. Seta 6 armed with thick long setules in distal part, seta 7 naked, all other setae plumose. Distal endite with three setae, two distalmost members slender, sharp, with distal parts unilaterally armed with sharp denticles; basalmost seta much shorter, bilaterally armed with setules. Basal endite with four stiff setae, increasing in size toward the base; a small sensillum near the base of distalmost seta. Four soft setae increasing in size basally (a – d). Gnathobase not clearly separated from basal endite. Distal armature of gnathobase with four elements: an elongated, cylindrical sensillum, a thin, bent seta, and two sharp spines. Filter plate III with seven setae. Limb IV (Figs. 4 G – H). Preepipodite setulated, epipodite with short process. Exopodite rounded, with six setae. Seta 3 longest, setae 1 – 2 slightly shorter than seta 3, setae 4, 5 and 6 of 1 / 3, 1 / 2 and 1 / 3 length of seta 3, respectively. Setae 1 – 4 plumose, seta 1 – 2 with short setules, almost plumose. Inner-distal portion of limb IV with four setae and small cylindrical sensillum: seta 1 slender, sharp; three flaming-torch setae (2 – 4) of similar shape, with reduced distal part, armed with 5 – 6 short setules only, decreasing in size basally. Three soft setae increasing in size basally. Gnathobase with a 2 - segmented seta, and a small hillock distally. Filter plate with five setae. Limb V (Fig. 4 I). Preepipodite setulated. Epipodite oval, with short process. Exopodite oval, not divided into two lobes, with four plumose setae, decreasing in size basally; seta 4 four times shorter than seta 1. Inner limb portion of oval lobe with setulated inner margin. At inner face, two setae, one equal in length to seta 2 of exopodite, other 1.5 times shorter. No filter plate. Ephippial female. Unknown. Male. Body of instar II juvenile male (Fig. 1 K) of same shape as in juvenile female of same instar. Body of adult male (Fig. 1 L) slightly lower than in female, height / length ratio about 0.58. Both eye and ocellus of size as in female, eye larger than ocellus. Postabdomen of instar II juvenile male (Fig. 3 H) of similar shape with that of female, ventral margin with clear step in the region of gonopores. Gonopores located at 1 / 3 length of ventral margin from to the end of postabdomen. Armament of postabdomen same as in female. Postabdominal claw same as in female. In adult male, postabdomen (Fig. 3 J) short, strongly narrowing distally in anal portion, subrectangular in postanal portion. Gonopores located ventrally at the end of postabdomen, close to the base of claws. Distal margin convex, distal angle broadly rounded. Preanal angle well-defined, prominent, postanal angle not defined. Distal part of postabdomen 1.2 – 1.3 times longer than preanal, anal and postanal portions of similar length. Wide clusters of short setules in place of marginal denticles. Lateral fascicles of setules same as in female. Postabdominal claw very short, 2.5 times shorter than preanal portion of postabdomen, basal spine very long, almost straight, about 2 / 3 of claw length. Antennule of instar II juvenile male (Fig. 3 I) broader than in female, with 9 terminal aesthetascs and a very small anlage of male seta. In adult male, antennule (Fig. 3 K) broad, length about two widths. Aesthetascs were poorly preserved in all available specimens, there are two lateral aethetascs, number of terminal aesthetascs and their length is unclear. Male seta arising at 1 / 4 length from tip, about 1 / 5 of antennule length. Limb I of instar II juvenile male (Figs. 4 I – J) with U-shaped copulatory hook; ventral face of limb with an anlage of copulatory brush seta and a peculiar hillock above it, not present in adult male. A row of about ten short setules on the ventral face of limb below the copulatory brush. Setae of endites same as in female. IDL with anlage of male seta; other setae (1 – 3) same as in female. In adult male, limb I (Figs. 4 K – L) more massive than in female, copulatory hook U-shaped, its distal portion little longer than basal one. A group of about ten thick setules, followed by group of five thinner setules, located under copulatory brush on ventral face of limb. Endite 3 more broad than in female, its seta 1 much thinner and slightly longer than in female. IDL seta 1 very small, setae 2 and 3 thinner and 1.5 times shorter than in female, male seta large, hook-like, almost as long as seta 3. Differential diagnosis. Alona aguascalientensis sp. nov. is a member of the pulchella - group of Alona s. lato and shares all distinctive features of the group. An unique feature of A. aguascalientensis sp. nov. is the presence of denticles on posteroventral corner of valves, which are never present in any other species of the group. It has moderately elongated, narrow postabdomen and clearly differs by its shape from A. azorica Frenzel & Alonso, 1988, A. anastasia Sinev, Alonso, Miracle & Sahuquillo, 2012, A. nigra Smirnov, 1996, A. altiplana Kotov, Sinev & Berrios, 2010, A. setulosa and A. anamariae sp. nov., which have shorter and broader postabdomens. A. aguascalientensis sp. nov. differs from A. karelica Stenroos, 1897 and A. bromelicola Smirnov, 1988 by the presence of long basal spine of the postabdominal claw. A. aguascalientensis sp. nov. differs from A. glabra Sars, 1901, A. archeri Sars, 1888, A. cambouei Guerne & Richard, 1893, and A. pulchella King, 1853 by weakly protruding distal angle of postabdomen and postanal marginal denticles of postabdomen being of the same size. A. aguascalientensis sp. nov. have morphology of major head pores rare for the group, with connection between central and posterior pores always absent, while connection between anterior and central pores present or interrupted. Most species of the group have either fully connected or fully disconnected major head pores, except A. azorica Frenzel & Alonso, 1988 and A. anastasia Sinev, Alonso, Miracle & Sahuquillo, 2012 wich show a similar pattern as A. aguascalientensis sp. nov..	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8673FFEC4FEEFA94FDA1B9B8.taxon	distribution	Distribution. So far it is known only from Aguascalientes. This quite distinctive species was not recorded in any works on Mexican cladocera (Elias-Gutierres et al. 2008 b), so we expect it to be an endemic with limited area of distribution, confined to the Central Plateau of Mexico. The species is encountered in a wide range of water bodies of Aguascalientes State, from the dry-hot low altitude (1850 m. a. s. l.) to the cold-high altitude region, but is not recorded from the subtropical region.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867AFFE84FEEFDEDFA53B948.taxon	etymology	Etymology. Species names honors Ana Maria Briano-Baéz, a mother of the second author.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867AFFE84FEEFDEDFA53B948.taxon	materials_examined	Type locality. La Araña dam, Sierra Fría, San Josй de Gracia, Aguascalientes. 29.09.1993, 22 ° 14 ' N, 102 ° 37 ' W. Type material. Holotype: parthenogenetic female from the type location, MGU Ml 118. Paratypes: 9 parthenogenetic females from the type location, MGU Ml 119; 10 parthenogenetic females from a pond near Hacia Tapias Viejas, Jesús María, Aguascalientes, 0 4.09.1993, AYS; 5 parthenogenetic females from Pond beside Los Hoyos town (to highway from Aguascalientes city to SLP city), El. Llano, Aguascalientes, 0 9.08.1988, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867AFFE84FEEFDEDFA53B948.taxon	diagnosis	Diagnosis. Parthenogenetic female. Body regularly oval, of moderate height; maximum height at middle of body; in adults height / length ratio about 0.66. Dorsal margin uniformly curved; postero-dorsal and postero-ventral angles broadly rounded. Body moderately compressed laterally. Ventral margin with about 30 – 35 setae, first 7 – 8 setae evenly increasing in length, last seta in the group very long, 1.5 times longer than previous. Postero-ventral angle with about 40 short setules, without denticles. Head shield with broadly rounded posterior margin; rostrum short, broadly rounded. Three narrowly connected major head pores, PP about 0.2 – 0.3 IP. Lateral head pores minute, located about 1.5 IP distance from midline, at the level of anterior major head pore. Labrum of moderate size; labral keel moderately wide, with convex anterior margin, rounded apex, and posterior margin with two clusters of short setules. Postabdomen short and broad, evenly truncated, length about 2.5 height. Distal margin straight to weakly convex, distal angle not prominent, broadly rounded. Postanal portion of distal margin straight, anal portion weakly concave. Dorsal margin with distal part 1.5 times longer than preanal one, with postanal portion shorter than anal. Preanal angle well-defined; postanal angle not defined. Postabdomen with 5 – 6 well-developed slender marginal denticles, decreasing in size basally, and with 2 – 4 groups of marginal setules on anal margin. Seven-eight lateral fascicles of setules; six-seven distalmost fascicles large, with distalmost seta of each fascicle slightly longer than neighboring marginal denticles. Postabdominal claw of moderate length, slightly longer than preanal portion of postabdomen. Basal spine about 0.2 of length of claw. Antenna I short and broad, with nine terminal aesthetascs. Antennal formula, setae 0 – 0 – 3 / 1 – 1 – 3, spines 1 – 0 – 1 / 0 – 0 – 1. Seta arising from basal segment of endopodite reaching to the end of endopodite. Spine on basal segment of exopodite longer than middle segment. Apical spines longer than apical segments. Limb I with accessory seta 3 times shorter than ODL seta. IDL with three setae, seta 1 well-developed, about 1 / 3 length of seta 3. Scrapers of limb II of similar morphology. Exopodite of limb III with seven setae, seta 3 being longest. Exopodite IV with six setae, flaming-torch setae of limb IV with well-developed distal portion. Exopodite V oval, with four setae, filter plate V absent. Epipodites IV and V with very long projections. Limb VI absent.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867AFFE84FEEFDEDFA53B948.taxon	description	Male unknown. Size. In single studied juvenile female of instar I, length is 0.23 mm, height 0.13 mm; in juvenile females of instar II, length 0.28 – 0.30 mm, height 0.17 – 0.18 mm; in adult female length 0.33 – 0.36 mm, height 0.23 – 0.25 mm. Description. Parthenogenetic female. General. In lateral view body (Figs. 5 A – C) regularly oval, of moderate height, maximum height at middle of body, in adults height / length ratio about 0.66. Dorsal margin uniformly curved; postero-dorsal and postero-ventral angles broadly rounded; posterior margin uniformly curved; ventral margin almost straight; antero-ventral angle rounded. Body moderately compressed laterally. Valves without prominent sculpture. Ventral margin (Fig. 5 D) with about 30 – 35 setae, first 7 – 8 setae evenly increasing in length, last seta in the group very long, 1.5 times longer than previous, next 10 setae short, other setae of moderate length. Postero-dorsal angle bears about 40 short setules of similar length, not organised in groups. A row of about 60 setules along the posterior margin on inner side of valve. Head of moderate size, triangle-round in lateral view, rostrum short, pointing downward. Eye larger than ocellus, both of them relatively large. Distance from tip of rostrum to ocellus in adults slightly greater than that between ocellus and eye. Head shield with maximum width behind mandibular articulation, without any sculpture; rostrum short, broadly rounded; posterior margin of head shield broadly rounded. Three narrowly connected major head pores, PP about 0.2 – 0.3 IP (Figs. 5 E – F). Lateral head pores minute, located about 1.5 IP distance from midline, at the level of anterior major head pore. Labrum (Figs. 6 A – C) of moderate size, labral keel moderately wide (height about 1.7 width), with rounded apex; anterior margin of keel convex, posterior margin with two clusters of very short setules. Thorax two times longer than abdomen, dorsal surface of abdominal segments not saddle-shaped. Postabdomen (Figs. 5 G – H) short and broad, evenly truncated, length about 2.5 height. Ventral margin straight. Basis of claws separated from distal margin by clear incision. Distal margin straight to weakly convex, distal angle not prominent, broadly rounded. Dorsal margin with distal part 1.5 times longer than preanal one, with postanal portion shorter than anal. Postanal portion of distal margin straight, anal portion weakly concave. Preanal angle well-defined, postanal angle not defined. Five-six well-developed slender marginal denticles, increasing in size distally, most with additional spinule near base of denticle, and with two-four groups of marginal setules on anal margin. Seven-eight lateral fascicles of setules, six-seven distalmost fascicles large, with distalmost seta of each fascicle slightly longer than neighboring marginal denticles. Several additional fascicles above the main row in anal portion. Postabdominal claw of moderate length, slightly longer than preanal portion of postabdomen. Basal spine about 0.2 of length of claw. Antenna I (Fig. 6 D) short and broad, length about 2 widths, with three clusters of very short setules at anterior face. Antennular sensory seta slender, two times shorter than antenna I, arising at 2 / 3 distance from the base. Nine terminal aesthetascs, two longest of them about half length of antennule. Antenna II relatively short (Fig. 6 E). Antennal formula, setae 0 – 0 – 3 / 1 – 1 – 3, spines 1 – 0 – 1 / 0 – 0 – 1. Basal segment robust, branches of moderate length and width, basal segments of both branches 1.5 times longer than others. Seta arising from basal segment of endopodite reaching to the end of endopodite. Seta arising from middle segment of endopodite of similar size with apical setae. Spine on basal segment of exopodite longer than middle segment. Apical spines longer than apical segments. Five pairs of thoracic limbs. Limb I (Figs. 6 G – F) of moderate size. Epipodite with a finger-like process, 1.5 times longer than epipodite itself. Accessory seta about 1 / 3 length of ODL seta. ODL with a single long seta. IDL with three setae and two-three clusters of small setules, setae 2 and 3 of similar length, longer than ODL seta, armed with thin setules in distal part, seta 1 of about 1 / 3 length of seta 3. Endite 3 with four setae of similar size. Endite 2 with three setae (d – f), seta f very long, 1.5 times longer than ODL seta. Endite 1 with two 2 - segmented setae, both setulated in distal part, without a flat seta (i). No naked inner setae on endites 1 – 2. Six rows of thin long setules on ventral face of limb. Two ejector hooks, one of them slightly larger than the other. Maxillar process elongated, with a short seta. Limb II (Fig. 6 H). Exopodite elongated, with a single naked seta of about half length of exopodite. Eight scraping setae, armed with spinules of similar shape, increasing in length distally. Distal armature of gnathobase with four elements. Filter plate with seven setae, the posteriormost three times shorter than others. Limb III (Figs. 6 I – K). Epipodite oval; exopodite subrectangular, with seven setae. Seta 3 being longest, seta 6 about 1 / 3 length of seta 3, setae 1 and 4 about 1 / 4 length of seta 3, other setae short. Seta 6 armed with thick long setules in distal part, seta 7 almost naked, all other setae plumose. Distal endite with three setae, two distalmost members slender, sharp, with distal parts unilaterally armed with minute denticles; basalmost seta much shorter, bilaterally armed with setules. Basal endite with four stiff setae, increasing in size toward the base, a small sensillum near the base of distalmost seta. Four soft setae increasing in size basally (a – d). Gnathobase not clearly separated from basal endite. Distal armature of gnathobase with three elements: an elongated, cylindrical sensillum; thin, bent seta and a sharp spines. Filter plate III with seven setae. Limb IV (Figs. 6 L – N). Preepipodite setulated, epipodite with a short process. Exopodite rounded, with six setae. Seta 3 longest, setae 1 – 2 slightly shorter than seta 3, setae 4, 5 and 6 of 1 / 2, 2 / 3 and 1 / 2 length of seta 3, respectively. Setae 1 – 4 plumose, seta 1 – 2 with short setules, almost plumose. Inner-distal portion of limb IV with four setae and small cylindrical sensillum, seta 1 slender, sharp, three flaming-torch setae (2 – 4) of similar shape, with well-defined distal part, armed with 6 – 7 long setules, decreasing in size basally. Three soft setae increasing in size basally. Gnathobase with a 2 - segmented seta, and a small hillock distally. Filter plate with five setae. Limb V (Fig. 6 O). Preepipodite setulated, epipodite oval, with a short process. Exopodite oval, not divided into two lobes, with four plumose setae, decreasing in size basally, seta 4 four-five times shorter than seta 1. Inner limb portion of oval lobe, with setulated inner margin. At inner face, two setae, one equal in length to seta 2 of exopodite, other two times shorter. No filter plate. Ephippial female and male unknown. Differential diagnosis. Alona anamariae sp. nov. is a member of the pulchella - group of Alona s. lato and shares all distinctive features of the group. A unique feature of A. anamariae sp. nov. is a very long last seta in the anterior group of setae of ventral margin of valves and short, relatively wide, evenly narrowing distally postabdomen. A. anamariae sp. nov. differs from the most species of the group by the small size. From similarlysized A. altiplana it also differs by the different proportions of setae on exopodites III – IV, and by the shorter postanal denticles of postabdomen. In general morphology and shape of postabdomen A. anamariae sp. nov. is similar to A. barbulata Megard, 1967, North American species of unclear affinities, but clearly differs from it by the absence of setulation on distal portion of labrum, by the morphology of head shield and head pores (in A. barbulata posterior part of head shield is triangular, lateral head pores are located closely to major pores), and by the morphology of the lateral fascicles of setules on postabdomen (in A. barbulata all setules in the fascicle are of the similar thickness, longest setules are located in the middle of fascicle).	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867AFFE84FEEFDEDFA53B948.taxon	distribution	Distribution. A. anamariae sp. nov. so far is known only from Aguascalientes, where it is rare. A. anamariae sp. nov. was not recorded in any previous publications on Mexican Cladocera (Elías-Gutiérrez et al. 2006), so we expect it to be an endemic with a limited area of distribution, confined to the Central Plateau of Mexico. The species is encountered in two localities from the east part of the state (dry-hot and high temperature in summer); in contrast, the type locality, La Araña dam, is the only place where this species was found in cold, high altitude area.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867EFFEA4FEEFA58FB49BA60.taxon	materials_examined	Type locality of A. glabra is " Argentina ", no further information was given by Sars (1901). Lectotype. Female, GOS F 12326 a. Studied material: 12 parthenogenetic females, 2 males from pond between El Picacho and Loma La Plata mountains. Aguascalientes. 23.10.1988 AYS; 20 parthenogenetic females from pond beside highway Aguascalientes city – Calvillo city. Calvillo, Aguascalientes, 0 3.09.1991, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867EFFEA4FEEFA58FB49BA60.taxon	discussion	Comments. Both females (Figs. 7 A – B) and males (Fig. 7 C – E) were found. Morphology of the studied specimens completely agrees with the recent redescription of the species (Sinev 2001 a). In our material there were no specimens with tuberculated valves, reported by Kotov et al. (2010) for Andean populations. In course of the redescription of the species, Sinev (2001 a) did not provide a description of male antennule. In studied male specimens, antennule (Fig. 7 E) moderately thick, length about 2 widths, provided with two lateral and ten terminal aesthetascs of similar length, about 2 / 3 length of antennule. Male seta short and thick, arising at 3 / 4 distance from the base, not reaching to the end of antennule. Such morphology of antennule is typical for the group, recorded for all species with known males. In Aguascalientes, Alona glabra can be at first glance confused with A. aguascalientensis sp. nov. specimens without denticles on posteroventral corner of valves. But A. glabra clearly differs by connected major head pores, protruding distal angle of postabdomen and by the morphology of postanal marginal denticles of postabdomen. In A. glabra, two-three distalmost denticles are significantly larger than others, while in A. aguascalientensis sp. nov., all denticles are of the same size. Male of A. glabra clearly differs from that of A. aguascalientensis sp. nov. by a shorter basal spine of the postabdominal claw.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867EFFEA4FEEFA58FB49BA60.taxon	distribution	Distribution. Common in Neotropics, including Mexico (Sinev 2001 a; Elías-Gutiérrez et al. 2008 a), encountered in Chilean and Bolivian Andes as well as in lowland (Kotov et al. 2010; Coronel et al. 2007). In Aguascaliantes, A. glabra is found in the south of the state, close to the subtropical region.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFEA4FEEFDA5FCA5BE33.taxon	materials_examined	Type locality. A pond on the crest of Chuska Mountains, New Mexico, about 5 miles N of Washington Pass, U. S. A. Type material. Holotype. Parthenogenetic female; British Museum (Nat. Hist.), London, 1966.3.21.7. Studied material: 16 parthenogenetic females from Pond near road in Los Hoyos town. El Llano, Aguascalientes, 21.09.1991, AYS; 9 parthenogenetic females from pond near Laguna Seca pond, San Josй de Gracia, Aguascalientes, 25.09.1993, AYS; 4 parthenogenetic females from La Araña dam, Sierra Fría, San Josй de Gracia, Aguascalientes, 29.09.1993, AYS; 2 parthenogenetic females, 1 ephippial female from pond near road to Los Arquitos town (in El Cariñan farm), Jesús María, Aguascalientes. 0 7.07.1988, AYS; 18 parthenogenetic females from pond in San Miguel de los Sandovales town, El Llano, Aguascalientes, 12.10.1991, AYS; 1 parthenogenetic females from pool in El Huarache farm, Calvillo, Aguascalientes, 26.06.1987, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFEA4FEEFDA5FCA5BE33.taxon	discussion	Comments. Morphology of the studied specimens (Figs. 7 F – J) completely agrees with the recent redescription of the species (Sinev, 2009 b), morphology of postabdomen (Fig. 7 H – I) is quite variable. In Aguasclientes, A. setulosa can be confused with A. aguascalientensis sp. nov. specimens without denticle on posteroventral corner of valves. But A. setulosa clearly differs from the latter in major head pores with interrupted (not absent!) connection between middle and posterior pore, shorter and broader postabdomen, and in the morphology of postanal marginal denticles of postabdomen. In A. setulosa, like in A. glabra, two-three distalmost denticles are significantly larger than others, while in A. aguascalientensis sp. nov. all denticles are of the same size.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFEA4FEEFDA5FCA5BE33.taxon	distribution	Distribution. The taxon is distributed from North Canada (Chengalath 1982) to North Mexico (Elías- Gutiérrez et al. 1997). According to Chengalath (1982), it is a eurybiotic species, distributed in different types of lakes, which can inhabit brackish waters. At the moment Aguascalientes is the southernmost location of the species. Here it was found mostly in the dry and temperate region, however, two of the localities (Laguna Seca pond and La Araña dam) are from the high altitude cold region.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFF64FEEF95EFAB2BFAB.taxon	materials_examined	Studied material: 3 parthenogenetic females from Pond near Laguna Seca pond. San Josй de Gracia, Aguascalientes, 25.09.1993, AYS; 6 parthenogenetic females from La Araña dam. Sierra Fría, San Josй de Gracia, Aguascalientes. 29.09.1993, AYS; 2 parthenogenetic females from small pool near the curtain of El Jocoqui dam, San Josй de Gracia, Aguascalientes, 25.02.2001, AYS; 10 parthenogenetic females from Pond 1, 2.5 Kms north of La Congoja town. San Josй de Grácia, Aguascalientes. 16.03.1991, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFF64FEEF95EFAB2BFAB.taxon	description	Description. Parthenogenetic female. General. In lateral view body (Figs. 8 A – C, 9 A – B) regular oval, of moderate height, maximum height at middle of body, in adults height / length ratio 0.67 – 0.70. Dorsal margin uniformly curved; postero-dorsal and postero-ventral angles broadly rounded; posterior margin uniformly curved; ventral margin almost straight; antero-ventral angle rounded. Body moderately compressed laterally. Valves oblique or with weakly developed tubercules in some specimens. Ventral margin with about 30 – 35 setae, anterior ten setae short, not forming separate group, distal setae of moderate length (Fig. 8 D). Postero-dorsal angle (Figs. 8 E, 9 C) bears about 70 short, thin, hair-like setules of similar length, not organized in groups. A row of about 80 thin setules along the posterior margin on inner side of valve. Head of moderate size, triangle-round in lateral view, rostrum short, pointing downward. Eye larger than ocellus. Distance from tip of rostrum to ocellus in adults slightly greater than that between ocellus and eye. Head shield with maximum width behind mandibular articulation, without any sculpture; rostrum short, broadly rounded; posterior margin of head shield broadly rounded. Three connected major head pores, middle pore smaller than other, PP about 0.5 IP (Figs. 8 F, 9 D). Lateral head pores minute, located about 1.0 – 1.2 IP distance from midline, at the level between anterior and middle major head pores. Labrum (Figs. 8 G – H) of moderate size; labral keel narrow (height about 2 width), with rounded apex; anterior margin of keel convex, posterior margin with two clusters of short setules. Thorax 2 times longer than abdomen, dorsal surface of abdominal segments not saddle-shaped. Postabdomen (Figs. 8 I – J, 9 E) short, of moderate width, truncated with prominent distal angle, length about 2.5 height. Ventral margin straight. Base of claws separated from distal margin by clear incision. Distal margin straight; distal angle prominent, protruding before the base of claw, acute with rounded tip. Dorsal margin with distal part 1.6 – 1.7 times longer than preanal one, with postanal portion 1.3 – 1.5 times shorter than anal. Postanal portion of distal margin straight, anal portion weakly concave. Preanal angle well-defined, protruding, postanal angle weakly defined. 6 – 8 well-developed marginal denticles, decreasing in size basally and with three-four groups of marginal setules on anal margin. Each denticle with 3 – 6 spinules anteriorly, length of distal denticles exceed width of the postabdominal claw base. Eight-nine lateral fascicles of setules, six-seven distalmost fascicles wide, with longest setae in the middle, slightly shorter than longest marginal denticles. Several additional fascicles above the main row in anal portion. Postabdominal claw of moderate length, slightly longer than preanal portion of postabdomen. Basal spine about 0.2 of length of claw. Antenna I (Fig. 8 L) of moderate size, length about 2.5 width, with three clusters of long thin setules at anterior face. Antennal sensory seta slender, two times shorter than antenna I, arising almost at the middle of antenna. Nine terminal aesthetascs, two longest of them about 2 / 3 length of antennule. Antenna II (Figs. 8 K, 9 F) relatively short. Antennal formula, setae 0 – 0 – 3 / 1 – 1 – 3, spines 1 – 0 – 1 / 0 – 0 – 1. Basal segment robust, branches of moderate length and width, basal segments of both branches 1.5 times longer than others. Seta arising from basal segment of endopodite thin, not reaching the end of endopodite. Seta arising from middle segment of endopodite of similar size with apical setae. Spine on basal segment of exopodite slightly shorter than middle segment. Apical spines slightly shorter than apical segments. Six pairs of thoracic limbs. Limb I (Figs. 10 A – B) of moderate size. Epipodite ovoid with a long process two times longer than exopodite itself. Accessory seta about 1 / 3 length of ODL seta. ODL with a long naked seta. IDL with three setae and two-three clusters of small setules, setae 2 and 3 only slightly shorter than ODL seta, armed with thin setules in distal part, seta 1 very short. Endite 3 with four setae of similar size. Endite 2 with three setae (d – f), setae f very long, 1.5 times longer than ODL seta. Endite 1 with two 2 - segmented setae, both setulated in distal part, without a flat seta (I) shifted to limb base. No anterior naked setae found on endites 1 – 2. Six rows of thin long setules on ventral face of limb. Two long, slender ejector hooks, one of them larger than the other. Maxillar process elongated, with a short seta. Limb II (Fig. 10 C). Exopodite elongated, supplied with a single setulated seta of about 2 / 3 length of exopodite. Eight scraping setae (1 – 8), armed with spinules of similar shape, increasing in length distally. Distal armature of gnathobase with four elements. Filter plate with seven setae, the posteriormost two times shorter than others. Limb III (Figs. 10 D – F). Epipodite oval; exopodite subrectangular, with seven setae. Seta 3 being longest, setae 1, 4 and 6 about 1 / 3, 1 / 3 and 2 / 3 length of seta 3, respectively; other setae short. Setae 6 – 7 naked, all other setae plumose. Distal endite with three setae, two distalmost members slender, sharp, with distal parts unilaterally armed with sharp denticles; basalmost seta shorter, bilaterally armed with setules. Basal endite with four stiff setae, increasing in size toward the base, a small sensillum near the base of distalmost seta. Four soft setae increasing in size basally (a – d). Gnathobase not clearly separated from basal endite. Distal armature of gnathobase with four elements: an elongated, cylindrical sensillum; thin, bent seta; other two sharp spines. Filter plate III with seven setae. Limb IV (Figs. 10 G – H). Preepipodite setulated, epipodite with process two times longer than exopodite itself. Exopodite rounded, with six setae. Seta 3 longest, setae 1 – 2 slightly shorter than seta 3, setae 4, 5 and 6 of 1 / 3, 2 / 3 and 1 / 2 length of seta 3, respectively. Setae 1 – 4 plumose, seta 5 with short thick setules unilaterally, seta 6 naked. Inner-distal portion of limb IV with four setae and small cylindrical sensillum, seta 1 slender, sharp, with long denticles, first flaming-torch seta (2) broad, with 5 – 7 thick setules, two other thin, slender, with thin hair-like setules. Three soft setae of similar size. Gnathobase with a 2 - segmented seta, and a small hillock distally. Filter plate with five setae. Limb V (Fig. 10 I). Preepipodite setulated, epipodite with process two times longer than exopodite itself. Exopodite divided into two lobes, incursion between lobes very deep, with four plumose setae, decreasing in size basally, seta 4 long, only 1.5 times shorter than seta 1. Inner limb portion, an oval lobe, with setulated inner margin. At inner face, two setae, one equal in length to seta 1 of exopodite, other 1.5 times shorter. Filter plate with three setae, large triangular sensillum located near it. Limb VI (Fig. 10 J) as elongated rounded lobe with setulated margin, length about 2 widths. Ephippial females and males were not found. Size. In single studied juvenile female of instar I, length is 0.21 mm, height 0.13 mm; in juvenile females of instar II, length 0.25 – 0.27 mm, height 0.16 – 0.19 mm; in adult female length 0.31 – 0.38 mm, height 0.21 – 0.25 mm.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFF64FEEF95EFAB2BFAB.taxon	discussion	Comments. The guttata - group is one of poorly studied groups of Alona s. lato. Alona guttata Sars, 1862 was described from Norway. Presently, A. guttata is reported worldwide, but identity between Palearctic populations and populations from other regions is strongly questioned (Van Damme & Eggermont, 2011). The second species of the group, A. barbulata, was described from USA, and is similar to A. guttata in many features (Megard, 1967). A. barbulata differs from A. guttata by the shape of head shield and postabdomen, which has almost right, not prominent distal angle (see Megard 1967). Morphology of limbs of A. barbulata remains unknown, and its close relationship with A. guttata, presumed by Megard (1967), is not confirmed. The third species of this group is Palearctic A. werestschagini Sinev, 1999, it clearly differs from A. guttata by the greater size and by the postabdomen morphology, but have similar appendages (see Sinev 1999). Studied populations from Mexico are similar to A. guttata s. str. instead of A. barbulata, since they have postabdomen with a prominent, acute distal angles. We found no significant differences between studied specimens and those from Europe (Alonso, 1996; Hudec 2010). Unfortunately, a full redescription of A. guttata was never conducted. Frequently, sibling-species of Chydoridae from different continents have no significant differences in the morphology of parthenogentic females, but clearly differ by that of the males (see Frey, 1985; Sinev 1998, 2009 a; Sinev & Atroschenko, 2011). We expect that studied populations are not conspecific to the Palearctic A. guttata s. str., but the level of study of the latter does not allow us to verify this thesis. The problem can be solved after a study of gamogenetic specimens or genetic studies.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC867CFFF64FEEF95EFAB2BFAB.taxon	distribution	Distribution. In Aguascalientes, this species is found in the North-West region of the state, within the area of temperate climate, at the altitude 2000 – 3100 m. a. s. l., and not present in area with dry-hot climate. Such distribution suggests that the studied populations are conspecific to the populations of A. cf. gutatta from USA and Canada.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF74FEEFF5EFE30BB27.taxon	materials_examined	Type locality. Neighborhood of San Paolo, Brazil. Type material. Holotype. Male, Zoological Museum of Oslo University, GOS slide F 12324 a. Studied material. 5 parthenogenetic females from pond near Laguna Seca pond, San Josй de Gracia, Aguascalientes, 25.09.1993, AYS; 38 parthenogenetic females from Pond 4, Mesa Montoro, Calvillo, Aguascalientes, 0 5.10.1990, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF74FEEFF5EFE30BB27.taxon	discussion	Comments. Alona ossiani is a sibling-species to Palearctic Alona affinis (Leydig, 1860). These species clearly differs by the male morphology (see Sinev, 1998), but their parthenogenetic females are not obviously distinguishable (Sinev, 2009 a). According to Sinev (2009 a), A. ossiani is the only species of the affinis - group known from the Americas. Specimens in our material (Figs. 10 K – M) demonstrated no significant differences from those from the type population of A. ossiani (see Sinev, 1998).	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF74FEEFF5EFE30BB27.taxon	distribution	Distribution. Alona ossiani appears to be widely distributed in North and South America, but precise records of this species, with male morphology described, are sparse (Sinev, 2009 a). In Aguascalientes, it is found in cold regions in two mountainous areas: Mesa Montoro mountain, over 2,500 m. a. s. l., and Laguna Seca pond in Sierra Fría mountain, at 3,100 m. a. s. l.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF74FEEFC6DFA55BEBF.taxon	materials_examined	Type locality. Lake Itasca, Clearwater County, Minnesota, U. S. A. Holotype. Parthenogenetic female; British Museum (Nat. Hist.), London, 1966.3.21.3. Material studied. 5 parthenogenetic females from pond near road to Los Arquitos town (in El Cariñan farm). Jesús María, Aguascalientes, 0 7.07.1988, AYS; 2 parthenogenetic females from Pond near La Tomatina town. Jesús María, Aguascalientes, 12.12.1989, AYS; 1 parthenogenetic female from small pond near El Colorín farm, Jesús María, Aguascalientes. 0 9.04.1993, AYS; 7 parthenogenetic females from pond in Gracias a Dios town, Jesús María, Aguascalientes, 0 9.04.1988, AYS; 2 parthenogenetic females from Pond in San Miguel de los Sandovales town. El Llano, Aguascalientes, 12.10.1991, AYS; 3 parthenogenetic females from Pond near La Gloria town. Asientos, Aguascalientes. 18.12.1990, AYS; 8 parthenogenetic females from Pond beside Mesa Montoro, Calvillo, Aguascalientes. 0 6.10.1990, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF74FEEFC6DFA55BEBF.taxon	discussion	Comments. Morphology of the studied specimens (Fig. 11 A – D) completely agrees with the recent redescription of the species (Sinev, 2009 b).	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF74FEEFC6DFA55BEBF.taxon	distribution	Distribution. It is distributed from North Canada (Chengalath, 1982) to North Mexico (Elías-Gutiérrez, 1997). According to Chengalath (1982), it is a eurybiotic species, distributed in different types of lakes, including those with brackish water. An interesting feature of A. circumfimbriata is its ability to inhabit streams. In Indiana it is one of four most common species of Cladocera in such habitats (Vila 1989). In Aguascalientes, it is found in the dry and temperate regions, but one locality, a pond beside Mesa Montoro, Calvillo, is to close to the subtropical zone.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF04FEEF8D8FC75BF37.taxon	materials_examined	Type locality. " … une mare à Brouillard, près de Port-au-Prince ", Haiti. Type material. Lost — absent in the Richard's collection (Kotov & Ferrari 2010). Studied material. 4 parthenogenetic females from Pond near road in Los Hoyos town. El Llano, Aguascalientes, 21.09.1991, AYS; 16 parthenogenetic females from Pond near road to La Colorada town. El Llano, Aguascalientes. 12.09.1992, AYS; 1 parthenogenetic female from Pool in El Huarache farm, Calvillo, Aguascalientes, 26.06.1987, AYS.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF04FEEF8D8FC75BF37.taxon	discussion	Comments. Morphology of the studied specimens (Fig. 11 E – H) completely agrees with the recent redescription of the species (Sinev et al. 2005). Closely related species, L. chihuahuensis Elías-Gutiérrez & Valdez- Moreno, 2008, was recently described from Chihuahua desert of Mexico, it appears to be a local endemic of the latter. For differences between these species, see Elias-Gutiérrez & Valdez-Moreno (2008).	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
03AE87DC8661FFF04FEEF8D8FC75BF37.taxon	distribution	Distribution. L. davidi is widely distributed in the Neotropics, but is never recorded in the mountainous areas. In Aguascalientes, L. davidi is found mainly in the dry, low altitude region, with xerophytic vegetation (mainly Cactacea and Leguminosae), where the summer temperatures are high.	en	Sinev, Artem Y., Silva-Briano, Marcelo (2012): Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico. Zootaxa 3569: 1-24, DOI: 10.5281/zenodo.214760
