taxonID	type	description	language	source
A12C8793FF83FFA5FF67FC34FAFDFBA6.taxon	materials_examined	Material. 3 parthenogenetic females from Lake Kud-Thing in foodplain of the Mekong River, Nong Khai Province, Thailand, 28.11.1998, coll. C. Saeng-aroon, AAK 2003 - 033; 2 parthenogenetic females, Lake Bueng Khong Long in Nam Tok Tat Kham Forest Park, Nong Khai Province, Thailand, 31.08.2002, coll. J. Teeramaethee, AAK 2003 - 040; 6 parthenogenetic females, several exuvia from, paddy field II near Phitsanulok in foodplain of the River Nan, Phitsanulok Province, Thailand, 27.09.1996, coll. L. Sanoamuang, AAK 2004 - 050; 8 parthenogenetic females from littoral of Lake Tonle Sap, Cambodia, N 13 º 14 ’ 17.4 ’’, E 103 º 49 ’ 43.9 ’’, 30.01.2010, coll. A. Y. Sinev; 12 parthenogenetic females from a slow-through village pond in Ta Lai village near Cat Tien National park, Dong Nai Province, Vietnam, N 11 ° 22.354, E 107 ° 20.773, 13.05.2009, coll. A. Y. Sinev.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF83FFA5FF67FC34FAFDFBA6.taxon	description	Description of Indochinese populations. Parthenogenetic female. In lateral view, body oval, moderately high (Fig. 1 A – B), maximum height at the middle of the body. Height-length ratio about 0.64 – 0.68. Dorsal margin convex, postero-dorsal and postero-ventral angles broadly rounded. Posterior margin almost straight. Postero-ventral angle (Fig. 1 C) with about 40 setules not organized into groups. Ventral margin weakly convex, with about 35 – 40 setae. Anterior 7 – 10 setae long, next 10 – 12 setae very short, setae in the middle of anterior margin almost as long as anterior setae, toward posterior margin, length of setae gradually decreases. Antero-ventral angle rounded. Carapace sculpture as weakly defined longitudinal lines or tubercules. Head relatively small, triangle-round in lateral view. In lateral view rostrum protruding downwards. Ocellus of variable size, in some specimens almost as large as eye. Distance from tip of rostrum to ocellus about 1 – 1.5 times of that between ocellus and eye. Head shield (Fig. 1 D) of typical for genus shape, in some specimens covered by tubercules. Rostrum short and rounded. Posterior margin notched. Two main head pores with a narrow connection between them (Fig. 1 E), PP less than 0.3 IP. Lateral head pores located with bilobed, asymmetric cosmaria, at 0.5 – 0.7 IP distance from midline, at level before anterior main head pore. Labrum of moderate size, without lateral projections (Fig. 1 F). Labral keel wide, height about 1.5 times width. Anterior margin of keel convex, with small denticle in the upper third, apex rounded, posterior margin convex or wavy, without setules. Thorax two times longer than abdomen. Dorsal surface of abdominal segments not saddle-shaped. Postabdomen (Fig. 1 G) short and wide, maximum height at preanal angle. Length about 2.3 – 2.4 height. Ventral margin weakly convex. Basis of claws separated from distal margin by clear incision. Distal margin straight, distal angle broadly rounded. Dorsal margin weakly convex in postanal portion and concave in anal one, distal part less than 1.5 times longer than preanal one, postanal portion 1.5 times shorter than anal one. Preanal angle prominent, postanal angle weakly defined. Preanal margin almost straight. Postanal margin with 4 – 5 well-developed, single sharp denticles, each with several spinules along anterior margin, size of denticles increasing distally. Length of longest denticles slightly more than width of base of postabdominal claw, 2.5 – 3 times exceeding width of denticle base. Anal margin with 4 – 5 groups of marginal spinules and setules. About 10 moderately wide lateral fascicles, posteriormost setae of each fascicle longest, about 2 times longer than neighboring marginal denticles. Postabdominal claw slender, of moderate length, shorter than preanal portion of postabdomen. Basal spine short and slender, about 0.2 of the claw length. Antennule (Fig. 1 H) of moderate size, length about 2.5 width, with 3 clusters of short setules at anterior face. Antennular seta of about half length of antennule, arising at 2 / 3 distance from the base. Nine terminal aestetascs of similar size, about 2 / 3 length of antennule. Antenna short and massive (Fig. 1 I). Basal segment robust, with short seta between branches, branches relatively short, all segments cylindrical, subequal in length. Basal and middle segment of endopodite with clusters of moderately short hard setules. Seta arising from basal segment of endopodite (omitted on drawing) thin, almost reaching end of endopodite. Seta arising from middle segment of endopodite of similar size to apical setae. Spine on basal segment of exopodite slightly longer than middle segment. Spines on apical segments slightly longer than apical segments. Thoracic limbs: five pairs. Limb I (Fig. 2 A, B). Epipodite oval, with finger-like projection two times longer than epipodite itself. Accessory seta 2.5 times shorter than ODL seta. ODL seta with short setules in distal portion. IDL with two setae: seta 3 with massive, claw-like, longer than ODL seta, distal part of seta thin, with several setules; seta 2 similar to seta 3, but smaller, with additional straight spine at the middle. Endite 3 with four short setae. Endite 2 with three setae, two of them longer than ODL seta. Endite 1 with three setae, seta pointed to the limb base 1.5 times shorter than two others. Ventral face of limb with 5 – 6 clusters of long setules and 3 – 4 clusters of short setules below them. Limb II subtriangular (Fig. 2 C). Exopodite elongated, with short seta. Eight short scraping spines, spines 3 and 6 more massive than others, armed with 7 – 9 and 6 – 7 massive denticles, respectively. Distal armature of gnathobase with four elements. Filter plate II with seven setae, the posteriormost members much shorter than others. Limb III. (Fig. 2 D, E) Epipodite very long and narrow. Exopodite quadrangular, with six setae. Seta 3 longest, setae 4 and 5 about 1 / 3 and 1 / 2 length of seta 3, other setae short. Setae 1 – 4 plumose, seta 5 armed bilaterally with hard setules, seta 6 naked. Distal endite with 3 setae, two distalmost members scraping, slender, sharp, with denticles in distal part, short bottle-shaped sensillum located between their bases. Basal endite and gnathobase typical for the genus. Limb IV (Fig 2 F, G). Pre-epipodite setulated; epipodite with finger-like projection as long as epipodite itself. Exopodite subquadrangular, with six setae. Seta 1 – 3 long, of similar length, setae 4 – 6 about two times shorter, seta 5 longer than seta 6. Setae 1 – 4 flat, plumose, setae 5 – 6 thin, with short setules in distal portion. Inner portion of limb IV with four setae and small sensillum. Scraping seta slender, sharp, first flaming-torch much wider than two other. Three soft setae, basalmost seta significantly larger than others. Gnathobase with two-segmented seta and a small hillock distally. Filter plate IV with five setae. Limb V (Fig. 2 H). Preepipodite setulated, epipodite oval, with finger-like projection as long as epipodite itself. Exopodite oval, with four plumose setae. Seta 1 – 3 long, subequal in length, seta 4 short, three times shorter than seta 1. Inner lobe as oval lobe. At inner face, two setae, distal seta two times longer than basal. Filter plate V absent. Ephippial female and male: for description, see Van Damme et al. (2011). Size. Adult female 0.30 – 0.34 mm, male up to 0.23 mm.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF83FFA5FF67FC34FAFDFBA6.taxon	distribution	Distribution. Recorded from South Europe (Spain, Abkhazia), Africa, South-West Asia and Indochina. Taxonomic notes. Populations of A. harti harti from Indochina do not differ significantly from those from South Europe, Africa, and South-West Asia (Alonso 1996; Sinev 2002; Van Damme et al. 2011). Some minor structures of limbs, like sensillum of endite 1 of limb I and soft seta of limb II were not found in our material, but they are possibly overlooked beacause of their small size (we don’t have access to dark field vision optic, like Van Damme et al. (2011 )). It is apparent that Alona harti is widely distributed, including in the Mediterranean region, Africa, and, possibly, in tropical and subtropical Asia – there are no data concerning the taxonomic status of the “ A. verrucosa ” records from India and China. A similar wide distribution was already recorded for Alona cambouei Guerne & Richard, 1898 (Sinev 2001). In Indochina, A. harti harti is the most common species of Anthalona.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF84FFABFF67FB5DFC1AFE76.taxon	materials_examined	Type locality. A tributary of the Mekong River, Dong Luang District, Mukdahan Province, Thailand, 31.01.1998, coll. L. Sanoamuang. Holotype. Parthenogenetic female from the type location, MMU Ml- 110. Paratypes. Parthenogenetic female from the type location, MMU Ml- 111; parthenogenetic female from a roadside ditch in Dong Nai National Park, Dong Nai Province, Vietnam, 22.10.2009, coll. A. B. Vasilieva, MGU Ml- 112. A single parthenogenetic female from the type location and a single male from a roadside ditch in Dong Nai National Park, Dong Nai Province, Vietnam, 22.10.2009, coll. A. B. Vasilieva were dissected and discarded afterward, not deposited.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF84FFABFF67FB5DFC1AFE76.taxon	diagnosis	Diagnosis. Parthenogenetic female. In lateral view body oval, maximum height at the middle of body, length / height ratio 0.6 – 0.63. Dorsal margin curved, postero-dorsal and postero-ventral angles broadly rounded. Posterior margin weakly convex. Postero-ventral corner of valves with about 60 small setules of variable length. Ventral margin with about 45 short setae. Head typical for genus. Eye larger than ocellus. Shape of head shield typical for genus, posterior margin of head shield broadly rounded. Two main head pores, PP about 1 IP. Lateral head pores with trilobed cosmaria, located about 1 IP distance from midline, at level of anterior major head pore. Labrum without denticles on anterior margin of keel. Postabdomen moderately short and broad, with broadly rounded distal portion, length about 2.3 – 2.4 height; ventral margin straight; distal angle broadly rounded; dorsal margin concave in postanal part and convex in anal part, with distal part about 1.3 times longer than preanal one, with postanal portion slightly longer than anal one; preanal angle as long blunt protrusion; postanal angle weakly defined; 5 – 6 very short marginal postanal denticles; about ten well-developed lateral fascicles of setules; posteriormost setae of postanal fascicles three times longer than marginal denticles; Postabdominal claw weakly curved, slender, little shorter than preanal margin of postabdomen; basal spine moderately short, thin, about 1 / 4 length of claw itself. Antennule typical for the genus. Antenna with antennal formula setae 0 - 0 - 3 / 1 - 1 - 3, spines 1 - 0 - 1 / 0 - 0 - 1. Antennal setae thin. Spine on basal segment of exopodite 1.5 times longer than middle segment. Apical spines 1.5 times longer than apical segments. Clusters of very long setules at the base of basal segment and at the end of middle segment of endopodite. Limb I with IDL setae long and thin, armed with thin setules. Setae on limb I endites long, of different length. Exopodite of limb II without seta, scraping spines not differentiated. Exopodite of limb III with seta 4 and 5 of similar length. Endopodite IV with three flaming-torch setae, distalmost seta much larger than two others.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF84FFABFF67FB5DFC1AFE76.taxon	description	Male. Body oval, slightly lower than in female. Ocellus and eye larger than in female, eye two times larger than ocellus. Postabdomen narrow, weakly narrowing distally, not curved; ventral margin straight, with clear step in region of gonopores; gonopores located at 1 / 5 length of ventral margin from the end of postabdomen; distal angle broadly rounded, postanal and anal margin straight; postanal angle not defined, preanal angle as prominent as in female; clusters of short setules in place of marginal denticles, lateral fascicles of setules similar to those of female, but with thinner distal setules; postabdominal claw two times shorter than that of female, strongly curved, with long thin basal spine about 1 / 3 length of claw itself. Thoracic limb I with short U-shaped copulatory hook; IDL setae 2 and 3 setae subequal in length, much thinner than in female; male seta thick, almost straight, slightly shorter than seta 3. Differential diagnosis. A. sanoamuangae sp. nov. can be easily differentiated from most species of Anthalona by the morphology of IDL setae, which are thin, not hook-like, and bear short thin setules. The only other species with such IDL morphology is the Congolese Anthalona simplex Van Damme, Sinev & Dumont 2011, which differs from Alona sanoamuangae sp. nov. in: (1) the simple round cosmaria of lateral pores; (2) more short and robust scrapers 6 – 8 of limb II; (3) weakly developed first flaming-torch seta of limb IV; and (4) less prominent preanal angle of postabdomen. Description. Parthenogenetic female. General shape. In lateral view body oval, lower than in most other species of the genus, (Fig. 3 A, B, 4 A, 6 A) maximum height at the middle of body, length / height ratio 0.6 – 0.63. Dorsal margin curved, postero-dorsal and postero-ventral angles broadly rounded. Posterior margin weakly convex. Carapace. Postero-ventral corner of valves with about 60 small setules of variable length (Fig. 3 C), in posterior part organized into groups. A row of about 90 setules of variable length along posterior margin at some distance from one on inner side of carapace. Ventral margin almost straight, with about 45 short setae. Valves with several weak longitudal lines in posteroventral portion. Head triangle-round in lateral view. Eye larger than ocellus. Shape of head shield as usual for the genus, with maximum width behind the mandibular articulation. Rostrum short, broadly rounded (Fig. 4 B, C, 6 B). Posterior margin of head shield broadly rounded. Two main head pores with narrow connection between them (Fig. 3 D), posterior major head pore larger than anterior, PP about 1 IP. Lateral head pores with trilobed cosmaria, located about 1 IP distance from midline, at level of anterior major head pore. Labrum morphology usual for the genus. Labral keel with a blunt apex (Fig. 3 E). Anterior margin of keel convex, without denticles, posterior margin without any clusters of setules. Indentations on the lateral sides of labrum similar to those found in species of Karualona (see Dumont & Silva-Briano, 2000). Thorax and a bdomen subequal in length. Postabdomen (Fig. 3 F, 4 D, E, 6 D) moderately short and broad, with broadly rounded distal portion, length about 2.3 – 2.4 height. Ventral margin straight. Distal margin almost straight, rounded angle between distal and dorsal margins. Dorsal margin convex in postanal part and concave in anal part, with distal part about 1.3 times longer than preanal one, with postanal portion slightly longer than anal one. Preanal angle as long blunt protrusion, postanal angle weakly defined. Preanal margin weakly concave. Postabdomen provided with 5 – 6 very short marginal postanal denticles, and with 3 – 4 groups of marginal setules on anal margin. About ten well-developed lateral fascicles of setules (Fig. 6 E), posteriormost setae of postanal fascicles very thick and long, three times longer than marginal denticles. Postabdominal claw (Fig. 4 G) weakly curved, slender, little shorter than preanal margin of postabdomen. Basal spine moderately short, thin, about 1 / 4 length of claw itself. One-two small spines located near the base of claw before the basal spine. Antennule (Fig. 3 G, 4 H, 6 C) with four clusters of setules on inner face. Antennular sensory seta slender, two times shorter than antennule, arising at 2 / 3 distance from the base. Nine aesthetascs, longest of them subequal in length to antennule, others little shorter. All aesthetascs projecting beyond anterior margin of the head shield. Antenna (Fig. 3 H, 4 I) with antennal formula setae 0 - 0 - 3 / 1 - 1 - 3, spines 1 - 0 - 1 / 0 - 0 - 1. Basal segment massive, branches of moderate length, basalmost segments of both branches 1.5 times longer than others. Seta arising from basal segment of endopodite thin, not reaching tip of distal segment. Seta arising from middle segment of endopodite of similar size with apical setae. Apical setae of similar size and thickness. Spine on basal segment of exopodite 1.5 times longer than middle segment. Apical spines 1.5 times longer than apical segments. Clusters of very long setules at the base of basal segment, and at the end of middle segment of endopodite. Mandibles as for genus. Maxillae (Fig. 3 I) with two setae setulated in distal part. Thoracic limbs: five pairs. Llimb I (Fig. 4 J, 5 A, B) of moderate size. Epipodite oval, with short finger-like projection. Accessory seta not found. ODL seta with short setules in distal part. IDL setae long, longer as ODL seta, without any denticles, with strong setules in distal part. Endite 3 with four setae subequal in length. On endite 2 there are three setae of different length, middle of them (e) longer than ODL seta. Endite 1 with two 2 - segmented setae (g – h), and a flat, geniculated, plumose seta in distal part (i) shifted to the limb base. No naked setae on anterior face of limb were found. Six rows of long setules on ventral face of limb. Two ejector hooks, one of them 1.5 times longer than other. Limb II triangle-rounded (Fig. 5 C, D). Exopodite elongated, of irregular shape, no exopodite seta was found. Inner portion of limb with eight scraping spines increasing progressively in length distally, with exception of scraper 6, which is shorter than scraper 7. Scrapers 3 and 6 with denticles slightly larger than that of surrounding scrapers. Distal armature of gnathobase with four elements. Filter plate II with seven setae, two posteriormost member considerably shorter than others. Limb III (Fig. 5 E – F). Epipodite oval, without any projection. Exopodite elongated, with six setae. Seta 3 longest, 3 times longer than setae 4 and 5, seta 4 little shorter than seta 5, all other setae very short. Setae 1 – 4 plumose, seta 5 with thick setules in distal part, seta 6 naked. Distal endite with 3 setae, two distalmost members (1 – 2) slen- der, with denticles in distal part and small sensillum located between their bases; basalmost seta (3) small, flattened, bilaterally provided with setules. Basal endite with 4 setae. Four slender sharp soft setae; a small-sensillumlike element near the basalmost of them. Gnathobase with sensillum and geniculated seta. Filter plate III with seven setae. Limb IV (Fig. 5 H, I). Pre-epipodite setulated, epipodite oval, with short finger-like projection. Exopodite subrectangular. Setae 1 – 4 long, plumose, seta 3 being longest, setae 5 – 6 short, naked, 3 times shorter than seta 3. Inner portion of limb IV with four setae, a scraper (1) and three flaming torch setae (2 – 4), and a sensillum. Distalmost flaming-torch (2) seta 3 times larger than others. Three soft setae increasing in size basally. Gnathobase with a long 2 - segmented seta and a small projection distally. Filter plate with five setae. Limb V (Fig. 5 J). Pre-epipodite setulated. Epipodite oval, with short finger-like projection. Exopodite oval, not subdivided into two lobe, with four plumose setae. Setae 1 – 3 long, evenly decreasing in size basally, seta 4 short, 5 times shorter than seta 1. Inner lobe broad oval, with setulated inner margin. At inner face, two setae, one equal in length to seta 2 of exopodite, other 2.5 times shorter. No filter plate. Ephippial female. Unknown. Male. A single somewhat deformed specimen was studied and afterwards dissected. Body oval (Fig. 3 J), appear to be slightly lower than that of female. Ocellus and eye larger than in female, eye two times larger than ocellus. Postabdomen (Fig. 3 K) more narrow than in female, weakly narrowing distally, not curved. Ventral margin straight, with clear step in region of gonopores. Gonopores located at 1 / 5 length of ventral margin from the end of postabdomen. Distal angle broadly rounded, postanal and anal margin straight. Distal part of postabdomen 2 times longer than preanal part. Postanal angle not defined, preanal angle as prominent as in female. Clusters of short setules in place of marginal denticles, lateral fascicles of setules similar to these of female, but with thinner distal setules. Postabdominal claw two times shorter than that of female, strongly curved, with long thin basal spine about 1 / 3 length of claw itself. Thoracic limb I more stout than that of female (Fig. 5 K – L), with short U-shaped copulatory hook 2 times shorter than limb itself. Copulatory brush present, copulatory brush seta short. Ventral face of limb below them with ten long setules, followed by ten shorter setules. IDL setae 2 and 3 subequal in length, much thinner than in female, male seta thick, almost straight, slightly shorter than seta 3. Size: length of three adult female was 0.34 – 0.37 mm, in single deformed adult male length was about 0.32 mm.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF84FFABFF67FB5DFC1AFE76.taxon	distribution	Distribution. Recorded from North-East Thailand and South Vietnam. Possibly distributed all over Indochina. Taxonomic notes. Anthalona sanoamuangae sp. nov. shares numerous common features with A. simplex Van Damme, Sinev & Dumont, 2011, the presumed basalmost species of Anthalona (Van Damme et al. 2011). Three of them are unique for the genus: (1) no typical scraping modifications on the first and second limbs (IDL and P 2 scrapers); (2) an expanded gnathobase on the second limb, and (3) a cluster of long setules on basal segment of antennal exopodite. The two first features are adaptations for feeding on fine organic particles (Van Damme et al. 2011), while the significance of the third is unclear. Like in A. simplex, the fourth and fifth limbs in A. sanoamuangae sp. nov. have longer plumose setae than in other Anthalona species, required for obtaining oxygen in benthic environments. So, like A. simplex (see Van Damme et al. 2011), A. sanoamuangae sp. nov. is a presumable muddweller, specialized on feeding on a fine organic matter. It is well-known that the clusters of strong setules on the antenna exopodite are characteristic of bethic anomopods (Kotov 2006). A. simplex and A. sanoamuangae sp. nov. form a separate group within the genus, which is characterized by its own apomorphies, this clade is a sister group to the main branch of the Anthalona, which evolved as scrapping animals. Limited distribution and rarity suggest the relict nature of the simplex - branch sensu Korovchinsky (2006).	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8AFFAEFF67FB7CFE8DFC7E.taxon	materials_examined	Type locality. " Rantau Abang marshes, Terengganu, West Malaysia " (Idris & Fernando 1981) Holotype. A parthenogenetic female, CMN C 1984 - 1140. Paratypes (all from the type locality). 20 parthenogenetic females, CMN C 1984 - 1141. Material examined. Two specimens from the paratypes listed above.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8AFFAEFF67FB7CFE8DFC7E.taxon	description	Redescription. Parthenogenetic female. In lateral view, body low oval, maximum after the middle of the body (Fig. 6 F, 7 A). Height-length ratio about 0.58. Dorsal margin convex, postero-dorsal and postero-ventral angles broadly rounded. Posterior margin almost straight. Ventral margin weakly convex, with about 30 setae. Anterior 10 setae long, next 10 – 12 setae short, length of setae increasing distally, 15 posterior setae (Fig. 6 J) very long, longer than anterior setae. Antero-ventral angle rounded. Carapace sculpture as weakly defined longitudinal lines. Head large and narrow, triangle-round in lateral view (Fig. 6 G). Gap between rostrum and anterior margin of valves wider than in most Aloninae. In lateral view rostrum elongate, reaching as deep as ventral point of valves. Ocellus and eye of similar size. Distance from tip of rostrum to ocellus about 2 times of that between ocellus and eye. Head shield, according to Idris & Fernando (1981), broad, rostrum moderately elongated, with rounded tip. Posterior margin notched. Two major head pores with a narrow connection between them (Fig. 6 H), PP less than 0.5 IP. Lateral head pores minute, located at about 0.9 IP distance from midline, at level between main pores. Labrum of moderate size, without lateral projections (Fig. 7 B). Labral keel wide, height about 1.5 times width. Anterior margin of keel polygonal, apex rounded, posterior margin straight, with cluster of long setules. Thorax 1.5 times longer than abdomen. Dorsal surface of abdominal segments not saddle-shaped. Postabdomen (Fig. 6 I, 7 C) short and wide, maximum height at postanal angle. Length about two times height. Ventral margin weakly convex. Basis of claws separated from distal margin by clear incision. Distal margin convex, distal angle broadly rounded. Dorsal margin convex in postanal portion and concave in anal one, distal part less than 1.5 times longer than preanal one, postanal and anal portion of similar length. Preanal angle prominent, postanal angle weakly defined. Preanal margin almost sigmoid. Postanal margin with 5 well-developed, single sharp denticles, with several spinules along anterior margin. Longest denticles slightly longer than the width of base of postabdominal claw, 3 times exceeding the width of the denticle base. Anal margin with 4 groups of marginal spinules. About 10 moderately lateral fascicles of setules. Postanal fascicles narrow, consisting of 3 – 6 setules, with very long, thick posteriormost setule, 2 times longer than neighboring marginal denticles. Fascicles in anal portion short, moderately broad. Postabdominal claw (Fig. 6 G) slender, of moderate length, slightly shorter than preanal portion of postabdomen. Basal spine short and slender, about 0.2 of the claw length. Antennule long and narrow, with long aesthetascs protruding beyond tip of rostrum. Antenna moderately long, massive (Fig. 7 D). Basal segment robust, with well-developed seta between branches. Branches elongated, with basal segments 1.5 times longer than apical ones. Middle segment of endopodite with cluster of long setules. Seta arising from basal segment of endopodite thin, reaching the end of endopodite. Seta arising from middle segment of endopodite of similar size to apical setae. One of apical setae of endopodite much thicker and longer than others. Spine on basal segment of exopodite significantly longer than middle segment. Spines on apical segments significantly longer than apical segments. Limb I (Fig. 7 E, F) with rounded epipodite, with finger-like projection more than two times longer than epipodite itself. ODL seta of moderate length, with very long setules in distal portion. IDL with two setae and three well-developed clusters of setules. IDL seta 3 almost as long as ODL seta, seta 2 1.5 times shorter, both setae thin, armed with thin setules in distal portion. Ventral face of limb I with 6 clusters of long setules. Epipodites of limb IV and V with finger-like projection two times longer than epipodite itself. Male unknown. Size. Length of female 0.27 – 0.36 mm.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8AFFAEFF67FB7CFE8DFC7E.taxon	distribution	Distribution. So far known from Malaysia only. Taxonomic notes. Possible close relationship between Matralona freyi and M. simoneae was suggested by Van Damme & Dumont (2009). Our data fully confirm this opinion. M. freyi shares main diagnostic characters of the genus Matralona (see Van Damme & Dumont 2009): very small size; characteristic morphology of head and rostrum, unique for the subfamily; two main head pores with narrow connection between them; labrum with a single cluster of long setules on posterior margin; long finger-like projections on limb epipodites; very long apical spines of antenna; IDL of limb I with two setae armed with long setules, and ODL seta armed with long setules. This combination of traits in Matralona is unique among the alonines. Morphology of postabdomen is very similar in M. simoneae and M. freyi. These numerous common features justify a position of M. fryei within the genus Matralona in spite of incomplete study of thoracic limb of the species. M. freyi differs from M. simoneae in (1) absence of denticles on posteroventral corner of valves, (2) longer posterior setae of valves, (3) longer spine on basal segment of exopodite, (4) longer setules on ODL setae and (5) normal (not bifurcated) process on epipodite I. Such differences are common for the species of same genus within other genera of Aloninae. Interestingly, the distribution of Matralona is very similar to that of the simplex - group of Anthalona.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8FFFAFFF67FC6FFAA9FCCE.taxon	materials_examined	Type species. Celsinotum parooensis Frey, 1991 (see Frey 1991). Emended generic diagnosis. Female. Large to moderately sized Aloninae: body high, rounded, compressed laterally valves, but not head shield, with well-expressed keel. Dorsal and ventral margins of valves strongly convex, postero-dorsal, postero-ventral and anterior-ventral angles of valves broadly rounded. Postero-ventral angle of valves without denticles. Head small, triangle-rounded in lateral view; rostrum short, truncated. Eye larger than ocellus. Head shield broad, rostrum from very short to moderately long in dorsal view, but always truncated, posterior margin of head shield straight. Three narrowly connected major head pores of same size. Lateral head pores minute. Labrum with large, rounded keel, with rounded apex; its posterior margin without any clusters of setules. Thorax at least 2 times longer than abdomen. Abdomen without abdominal joint, its middle segment not saddle-shaped. Postabdomen moderately long, narrowing distally. Ventral margin straight. Basis of claws separated from distal margin by clear incision. Distal margin straight or convex, distal angle broadly rounded. Dorsal margin straight in both anal and preanal positions. Preanal angle well-defined to prominent; postanal angle defined. Marginal denticles in clusters, short, never exceeding width of postabdominal claw base. Lateral fascicles of setules numerous, short, of moderate width. Postabdominal claw of moderate size, with basal spine. Antennule with nine terminal aesthetascs. Antenna with formula: setae 0 - 0 - 3 / 1 - 1 - 3; spines 1 - 0 - 1 / 0 - 0 - 1. Seta of the basal endopod segment always reaching beyond the end of endopod. Seta of the middle endopod and segment, and apical setae of same morphology. Spine of basal exopod segment from very small to moderately long, but shorter than middle segment. Spines of apical segments short, always less than half length of these segments. Five pairs of thoracic limbs. Limb I with accessory seta. ODL with one long seta. IDL with seta 1 strongly reduced, minute, setae 2 – 3 armed with thin setules. Endite 3 with four setae, Endite 2 with three setae. Endite 1 with two 2 – segmented setae, third seta absent or present. No naked seta on anterior faces of endites 2 and 3. Ventral face of limb with rows of thin setules. Limb II. Exopodite with very short seta or without it. Inner portion of limb with eight non-differentiated scraping spines, no naked seta near the base of scraper 1. Filter plate II with seven setae, two posteriormost setae considerably shorter than others. Limb III exopodite with six setae, seta 3 being longest; terminal setae (4 – 6) long. Scrapers of distal endite long and slender. Filter plate III with seven setae. Limb IV exopodite with six plumose setae; seta 3 being longest. Inner lobe of limb IV with scraping seta, three flaming-torch setae and small cylindrical sensillum. Three short soft setae. Gnathobase with short 2 - segmented setae and a blunt process near it. Filter plate IV with five setae. Limb V exopodite not separated into two lobes, with 4 plumose setae. Inner limb portion as oval lobe. At inner face, two short setae of similar size. Filter plate V of 0 – 1 setae.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8FFFAFFF67FC6FFAA9FCCE.taxon	description	Male. Body of shape similar to female, with dorsal keel. Postabdomen similar to that of female, but less wide; sperm ducts openings located close to the end of postabdomen, in lateral position. Postabdominal claw much shorter than in female. Antennule with numerous lateral and terminal aesthetascs.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8FFFAFFF67FC6FFAA9FCCE.taxon	discussion	Comments. Our study revealed several new, previously undescribed features of “ Alona ” macronyx, including a well-developed keel on the valves. The male was described for the first time. Analysis of morphology shows that the species should be translocated into the genus Celsinotum Frey, 1991. The diagnosis of the genus is emended, as the original description of Frey (1991) encompasses only three Australian species, but two more species from Brazil were already described subsequently (Smirnov & Santos-Silva, 1995; Sinev & Elmour-Loureiro 2010).	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8EFFB6FF67FCFFFD14FE76.taxon	materials_examined	Material studied. 8 parthenogenetic females and 1 male from a paddy field II, near Phitsanulok, foodplain of the River Nan, Phitsanulok Province Thailand, 27.09.1996, coll. L. Sanoamuang, AAK 2004 - 050; 4 females from littoral of Bau Sau Lake, Cat Tien National park, Dong Nai Province, Vietnam, N 11 ° 45.908 ’ E 107 °. 34.475 ’, 8.05.2009, coll. A. Y. Sinev; 2 females from small forest pool near Bau Sau lake, Cat Tien National park, Dong Nai Province, Vietnam, N 11 ° 27.178, E 107 ° 20.328, 8.05.2009, coll. A. Y. Sinev.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8EFFB6FF67FCFFFD14FE76.taxon	description	Redescription. Parthenogenetic female. Body (Fig. 8 A – C, 9 A – D) high and rounded in lateral view, strongly compressed laterally, with expressed dorsal keel. Maximum height before the middle of the body, height / length ratio 0.85 – 0.9 in adults. Dorsal margin evenly arched, postero-dorsal angle not expressed, posterior margin almost straight. Postero-ventral angle (Fig. 8 F) broadly rounded, with about 20 short setules of variable thickness, forming weakly separated groups. A row of about 50 – 70 long, very thin setules along posterior margin on inner side of carapace, with smaller setules between. Ventral margin convex, with a distinctive outer flange in anterior part (Fig. 8 E), such flange was never recorded for any other Aloninae. About 40 ventral setae (Fig. 8 D), ten ateriormost setae long, with no recognisable setules, next five setae short, about 25 setae in central portion of margin of moderate length, densely setulated bilaterally, last 10 – 12 setae very short, similar in size to spines of postero-ventral angle. Antero-ventral angle rounded. Carapace ornamentation as well-developed non-anostomosing lines. Head (Fig. 8 G) elongated and narrow in lateral view, rostrum narrow, obliquely truncated, protruding forward and downwards. Ocellus small, eye two-three times larger than ocellus. Distance from tip of rostrum to ocellus 1.5 – 2 times larger than that between ocellus and eye. Head shield with ridge going along the midline, maximum width behind mandibular articulation, very wide if flattened (Fig. 8 H). Rostrum narrow, truncated (Fig. 9 F). Posterior margin straight in middle portion. Three major head pores with narrow connection between them, located on a flattened area of head shield (Fig. 8 I, 9 E). Middle pore smaller than two others. PP about 0.3 – 0.5 IP in adults. Lateral head pores at about 0.7 IP distance from midline, at level of central major head pore. Labrum of moderate size (Fig. 10 A, B). Labral keel oval, with rounded or blunt apex, height / width ratio about 2.5. Anterior margin of keel evenly convex, posterior margin convex without clusters of setae. Thorax three times longer than abdomen. Dorsal surface of abdominal segments not saddle-shaped. No abdominal projections. Postabdomen (Fig. 9 G, 10 C – D) of moderate length and width, strongly narrowing distally, length about 3.0 – 3.2 heights in adult. Ventral margin straight. Basis of claws separated from distal margin by deep incision. Distal margin convex, distal angle broadly rounded. Dorsal margin straight in both postanal and anal portions, with distal part about 4 times longer than preanal one, with postanal portion 2 times longer than anal one. Preanal angle weakly protruding, postanal angle well-defined. Preanal margin almost straight. Setae natatoriae about 2.5 length of preanal portion of postabdomen. Postanal margin with 11 – 14 clusters of 2 – 5 small, sharp, narrow denticles in each, size of denticles increasing distally, number of denticles per cluster decreasing distally, in some specimens several distalmost denticles are single. Length of longest denticles slightly smaller than width of base of postabdominal claw. Anal margin with 4 – 5 groups of marginal setules. Postanal portion with 8 – 10 moderately broad lateral fascicles, longest posteriormost setae of each fascicle, longer than nearby marginal denticles. Anal portion with several smaller fascicles, spaced irregularly in two rows. Postabdominal claw long, weakly curved, 1.7 – 2 times longer than preanal portion of postabdomen (Fig. 9 H). Basal spine very long, straight and slender, about 0.4 – 0.5 times claw length. Antennule (Fig. 10 E) long and narrow, not reaching tip of rostrum. Antennular seta thin, of about half length of antennule, arising at 2 / 3 distance from the base. Nine terminal aesthetascs, two longest longer than antennule itself. All aesthetascs projecting beyond anterior margin of head shield. Antenna relatively short (Fig. 10 F). Antennal formula setae 0 - 0 - 3 / 1 - 1 - 3, spines 1 - 0 - 1 / 0 - 0 - 1. Basal segment robust, branches relatively short, with basal segments 1.5 times longer than middle and apical segments. Setae arising from basal and middle segment of endopodite, 1.5 times longer than endopodite itself. Spine on basal segment of exopodite significantly shorter than middle segment, about 2 / 3 of its length. Spines on apical segments short, about 1 / 3 length of the segment. Maxillule (Fig. 11 A) with three setae. Thoracic limbs: five pairs. Limb I large, trunk clearly separated from its base (Fig. 11 B – C). Epipodite small, rounded, with long fingerlike projection 3 times longer than epipodite. Accessory seta short, about 1 / 4 length of ODL seta. ODL seta with thin setules in distal portion. IDL with three setae and two large clusters of stiff setules. IDL seta 1 very small, rudimentary; setae 2 and 3 without clearly defined annulus, armed with thick stiff setules in distal part, of similar length, slightly shorter than ODL seta. Endite 3 with four setae subequal in length. Endite 2 with three setae, longest of them (e) longer than ODL seta. Endite 1 with two 2 - segmented setae, and a stub-like rudiment of flat seta (i). Endites 1 and 2 both without naked seta or sensillum on anterior face. Seven-eight rows of thin setules on ventral face of limb. Two ejector hooks, one little shorter than other. Maxillar process elongated, with short setulated in distal part seta. Limb II subtriangular (Fig. 11 D – E). Exopodite elongated, setulated distally, without seta. Eight scraping spines, spines 1 – 2 long, spines 3 – 5 of moderate length, spines 6 – 8 short. Size of denticles on basal part of spines evenly decreasing from basal to distal spines. Distal armature of gnathobase (Fig. 9 G) with four elements: two lateral are minute, pointed; one of the middle elements geniculated, setulated in distal part; other broad, with two rows of denticles. Filter plate II with seven setae, two posteriormost members 3 – 4 times shorter than others. Limb III (Fig. 11 F – H). Epipodite very small, oval, with finger-like projection two times longer than exopodite itself. Exopodite very small in comparison with limb I, subquadrangular, with six setae. Seta 3 longest, seta 4 and 5 about 1 / 2 and 1 / 3 length of seta 3, respectively, other setae short. Setae 1 – 4 plumose, setae 5 with with short thick setules in distal part, seta 6 naked. Distal endite with 3 setae, two distalmost members scraping, slender, sharp, with spinules in distal part, short bottle-shaped sensillum located between their bases; basalmost seta two times shorter, with long setules on basal side. Basal endite with 4 plumose setae increasing in size basally. Four pointed soft setae increasing in size basally, a small sensillum near the distalmost seta. Distal armature of gnathobase with four elements: first one an elongated, narrowing distally sensillum; second strongly geniculated seta; third and fourthspines. Filter plate III with seven setae of equal length. Limb IV (Fig. 11 I – J). Pre-epipodite setulated. Epipodite oval with finger-like projection 1.5 times longer than epipodite itself. Exopodite very small in comparison with limb I, with six short setae. Setae 1 and 3 being longest, setae 2 and 5 little shorter about 2 / 3 length of seta 3, setae 4 and 6 about 1 / 3 length of seta 3. Inner portion of limb IV with four setae and small cylindrical sensillum. Scraping seta slender, without spinules in distal part, first flaming-torch seta large, with broad base, two other slender, with narrow bases. Small sensillum between the bases of middle and basal flaming-torch setae. Three soft setae slightly increasing in size basally. Gnathobase with short two-segmented seta and small hillock distally. Filter plate IV with five setae of equal length. Limb V (Fig. 11 K). Epipodite oval, with finger-like projection 1.5 times longer than epipodite itself. Exopodite very small in comparison with limb I, subrectangular, not divided into two lobes, with four short plumose setae, with length gradually decreasing basally. Inner limb portion as oval lobe, with setulated inner margin. At inner face, two setae densely setulated in distal part, of same length as exopodite seta 2. Filter plate consisting of single seta, small sensillum-like structure located between filter plate and gnathobase seta. Male. Similar in shape to juvenile female of instar II but slightly larger (Fig. 8 J). Dorsal keel developed. Maximum height before the midline, height / length ratio about 0.77. Eye and ocellus of same shape as in female. Postabdomen (Fig. 10 G) long, irregularly narrowing distally, maximum height at postanal angle. Length about 4 heights. Ventral margin wavy. Postabdominal claws situated on large protrusion. Sperm ducts open laterally, at some distance from the end of postabdomen. posteroventral and posterodorsal rounded. Dorsal margin weakly concave in both postanal and anal portions. Preanal angle well-defined, postanal angle weakly defined. Preanal margin almost straight. Clusters of thin setules in place of female marginal denticles. Lateral fascicles of setules same as in female. Postabdominal claw curved, much shorter than in female, length about 1.5 of that of postanal margin. Basal spine shorter than in female, straight, about 1 / 3 f length of claw itself. Antennule was not studied. Limb I (Fig. 11 L – M) with U-shaped copulatory hook. IDL with three setae: seta 1 absent; setae 2 and 3 similar to that of female. Male seta curved, about 2 / 3 length of seta 2. Copulatory brush seta about 1 / 2 length of IDL seta 2. Ventral face of the limb under copulatory brush with two rows of 20 – 25 short stiff setules. Unlike in female, endite 1 with three setae, flat seta (i) not reduced to a stub. Size. According to Rajapaksa & Fernando (1985), length of adult female is 0.41 – 0.52 mm, length of all studied adult specimens was within this range. Length of single studied adult male was 0.36 mm.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF8EFFB6FF67FCFFFD14FE76.taxon	distribution	Distribution. According to Rajpaksa & Fernando (1997), С. macronyx is widely distributed in the Oriental zone, inhabiting India and Sri Lanka, Indochina, Indonesia, Philippines, and South China. Here it is reported from Vietnam for the first time. Taxonomic notes. Our data on C. macronyx fully agrees with the redescription of the type material conducted by Rajapaksa & Fernando (1985), there is no doubt of the species identity. At the moment, genus Celsinotum includes three West Australian (C. hypsophilum Frey, 1991, C parooensis Frey, 1991, and C. platamoides Frey, 1991) and two Brazilian species (C. laticaudatum Smirnov & Santos-Silva, 1995, and C. candango Sinev & Elmoor-Loureiro, 2010). C. macronyx is the only species distributed in South-East Asia. Celsinotum is closely related to genus Leberis Smirnov, 1989, sharing numerous similarities with the latter (Sinev et al. 2005). Celsinotum macronyx shares distinctive features of trunk limb morphology of the Leberis - Celsinotum clade: (1) truncated rostrum, (2) reduced IDL setae 1, (3) exopodite II without setae, (4) filter plate II with two very short posteriormost setae, (5) six setae on exopodite III, (6) truncated postabdomen with numerous small marginal denticles, and others. There are four main characters suggesting the position of “ Alona ” macronyx in the genus Celsinotum: (1) A well-developed keel on the valves, characteristic of Celsinotum. Species of Leberis lack a keel, having only weekly developed dorsal ridge. (2) Lateral position of sperm ducts on male postabdomen. Such position is observed in the Australian species of Celsinotum (Frey 1991), while in all Leberis species sperm duct openings are located on the ventral margin of postabdomen (Frey 1998; Sinev et al. 2005; Elías-Guttiérez & Valdes-Moreno 2008). (3) Reduction of the third seta of endite 3 of limb I. This seta is present in Australian species of Celsinotum (Frey 1991), but in south American C. candango it is reduced to a small stub, similarly with C. macronyx. In contrast, in all species of Leberis this seta is always well-developed, long, reaching almost to the end of maxillar process (Frey 1998; Sinev et al. 2005; Elias-Guttierez & Valdes-Moreno 2008). (4) Posterior margin of the head shield straight, perpendicular to midline. In Leberis, posterior portion of the head shield is broadly rounded. Relationships between species within Celsinotum are not obvious yet. Apparently, Australian species are closely related to each others, having similar outer morphology and shape of postabdomen. But morphology of limbs was studied only for one species, C. parooensis, and some important features, including inner portions of limbs III – IV were not described (see Frey 1991). C. macronyx shares some affinities with South American C. candango, including similar shape of the postabdomen, a large spine on basal segment of antenna exopodite, reduction of a seta on endite III of limb I, and a transformed spine-like posteriormost ventral setae of valves. The description of C. laticaudatum (Smirnov & Santos-Silva 1999) is incomplete, and no information about the trunk limbs was provided, so relationships of this species are completely unclear.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF97FFB9FF67FDDDFE41FBCB.taxon	materials_examined	Material studied. A single adult parthenogenetic female from, a big pond Bung Jod in " Phoenix " factory, Khon Kaen Province Thailand, 11.04.2003, coll. A. A. Kotov, N. Phukman, sample not saved; a juvenile female from the Ping River, Chiang Mai Province, Thailand, 22.03.2003, coll. L. Sanoamuang.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF97FFB9FF67FDDDFE41FBCB.taxon	description	Description. Parthenogenetic female. In lateral view body low oval (Fig. 12 A, 13 A, E), maximum height at the middle of body, length / height ratio about 0.58. Dorsal margin curved, postero-dorsal and postero-ventral angles broadly rounded. Posterior margin convex. Postero-ventral corner of valves with about 15 small setules (Fig. 12 B). A row of about 80 setules, consisting of alternating very long and short setules along posterior margin at some distance from one on inner side of carapace. Ventral margin almost straight, with about 40 setae, first ten setae long, next ten setae very short, setae in posterior portion of margin as long as anterior setae. Valves without distinctive sculpture. Head (Fig. 13 D, H) triangle-round in lateral view. Eye and ocellus large, of similar size. Rostrum elongated, with rounded tip (Fig. 12 D). Two main head pores with narrow connection between them (Fig. 13 B), lateral pores without cosmaria. Labrum relatively small, with narrow oval keel. Thorax two times longer than abdomen. Postabdomen (Fig. 12 C, 13 C, G) elongated, with parallel margins, length about 2.3 – 2.4 height. Ventral margin weakly convex. Distal margin convex, distal angle rounded. Dorsal margin straight in postanal part and convex in anal part, with distal part about 2.3 times longer than preanal one, with postanal portion two times longer than anal one. Preanal and postanal angles well-defined. Preanal margin weakly concave. Postabdomen provided with 6 clusters of 2 – 3 very small margina denticles on postanal margin, and with 4 groups of marginal spinules on anal margin. Eleven lateral fascicles of setules, posteriormost setae of postanal fascicles very thick and long, in distal fascicles about 3 width of claw base. Postabdominal claw weakly curved, thin, longer than preanal margin of postabdomen. Basal spine very short, less than 0.1 length of claw itself. Antennule (Fig. 12 D) relatively small, not reaching the tip of rostrum by far. Antennular seta thin, of about half length of antennule, arising at 2 / 3 distance from the base; a cluster of long setules located near its base. Nine terminal aestetascs of similar size, about half length of antennules. All aesthetascs not reaching the tip of rostrum. Antenna relatively short and massive (Fig. 12 E, 13 F), antennal formula setae 0 - 0 - 3 / 1 - 1 - 3, spines 1 - 0 - 1 / 0 - 0 - 1. Basal segment robust, with cluster of long setules. Branches relatively short, with basal segments 1.5 times longer and more massive than middle and apical segments. Setae arising from basal segment of endopodite short, not reaching the end of endopodite. Setae arising from middle segment of endopodite of same size with apical setae. Spine on basal segment of exopodite 1.3 – 1.4 times longer than middle segment. Spines on apical segments 1.5 times longer than apical segments segment. Basal and middle segments of exopodite with clusters of long hard setules in distal portion. Thoracic limbs: five pairs, limb VI not found. Limb I (Fig. 12 F – G). Epipodite small, rounded. Accessory seta about 1 / 3 length of ODL seta. IDL with two setae (2 and 3), both of them long, slender, armed with long setules distally, seta 3 about 3 / 4 length of ODL seta, seta 2 about 2 / 3 length of ODL seta. Endite 3 with four setae, seta (c) significantly longer and thicker than others. On endite 2 there are three setae of different length, middle of them (e) as long as ODL seta. Endite 1 with two 2 - segmented setae (g – h), and a flat seta (i) shifted to the limb base. Both endite 1 and 2 with rudimentary naked setae on anterior face. Five rows of long setules on ventral face of limb. Two ejector hooks, one of them 1.5 times longer than the other. Limb II with eight scraping spines, spines 6 thicker and shorter than neighbours. Limb III (Fig. 9 H). Exopodite small, rounded, with six setae. Seta 3 longest, seta 4 and 5 about 1 / 3 and 1 / 2 length of seta 3, respectively, other setae short. Setae 1 – 4 plumose, setae 5 with with short thick setules in distal part, seta 6 naked. Distal endite with 3 setae, two distalmost setae scraping, slender, sharp, with spinules in distal part, seta 1 1.5 times longer than seta 2, basalmost seta (3) short, flattened. Limb IV. Exopodite rounded, with six setae, seta 3 being longest. Setae 1 – 4 long, plumose. Inner portion of limb IV (Fig. 12 I) with only three setae, a scraper (1) and two flaming torch setae (2 – 3), and a sensillum. Both flaming-torch setae broad, with short distal part 3 times larger than others. Three soft setae (a – c) (Fig. 12 J), increasing in size basally, seta c very large. Gnathobase with a long 2 - segmented seta and a large projection distally. Filter plate present. Limb V (Fig. 12 K). Pre-epipodite setulated. Epipodite oval, without finger-like projection. Exopodite oval, not subdivided into two lobes, with four plumose setae. Setae 1 – 3 long, evenly decreasing in size basally, seta 4 short, 4 times shorter than seta 1. Inner lobe broad oval, with setulated inner margin. At inner face, two setae, one equal in length to seta 2 of exopodite, other 2.5 times shorter. No filter plate. Ephippial female and male. Not known. Size: length of juvenile female was 0.33 mm; length of adult female 0.38 mm.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
A12C8793FF97FFB9FF67FDDDFE41FBCB.taxon	distribution	Distribution. So far known from North-West and North-East Tahiland. Taxonomic notes. Studied specimens obviously belong to an undescribed new species, but the inadequate material keeps us from making a full description. This taxon can be formally placed into Coronatella, as it shares most diagnostic features of the genus, as defined by Van Damme & Dumont (2008). But it has some interesting unique and rare features: rectangular postabdomen; very long and thin postabdominal claw; strongly developed lateral fascicles of setae on postabdomen, resembling these of Anthalona; cluster of long setules near the base of antennal seta, never observed within Aloninae; very long and thin IDL setae; only two flaming-torch setae on the limb IV (as in the genus Karualona and Anthalona brandorffi (Sinev & Hollwedel 2002 )). Probably, this species even belongs to a new genus.	en	Sinev, Artem Y., Kotov, Alexey A. (2012): New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina. Zootaxa 3334: 1-28, DOI: 10.5281/zenodo.210604
