Alloniscus buckupi Campos-Filho & Cardoso, 2018
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https://doi.org/10.1590/2358-2936e2018014 |
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https://treatment.plazi.org/id/AC1DF848-AE69-310B-A225-6461FEE6FB63 |
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Felipe |
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scientific name |
Alloniscus buckupi Campos-Filho & Cardoso |
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sp. nov. |
Alloniscus buckupi Campos-Filho & Cardoso View in CoL n. sp.
( Figs. 1 View Figure 1 –4)
Type material. Holotype: 1 ♂ (parts in micropreparations) ( MZUSP 36762 View Materials ), Brazil, Paraíba, João Pessoa, Praia de Cabo Branco , 7°07’25”S 34°49’23”W, VIII.2017, leg. S. Vaiciulyte. GoogleMaps Paratypes: 3♀ ( MZUSP 36763 View Materials ), same data as holotype GoogleMaps .
Description. Maximum body length: ♂ 5.5 mm, ♀ 6 mm. Body outline as in Fig. 1A View Figure 1 . Color light brown. Cephalon and antenna with irregular unpigmented spots; pereonites and epimera 1–7 gradually more pigmented on posterior portions, pereonites 1–3 with many unpigmented spots; pleon, telson and uropods strongly pigmented. Body convex; pereonites 1 and 2 epimera directed frontwards, 3–7 gradually more directed backwards; posterior margin of pereonite 7 strongly arched ( Fig. 1A View Figure 1 ). Dorsum covered with ovoid-shaped scale setae ( Fig. 1B View Figure 1 ), and fan-shaped narrowed on middle on posterior portions of pereonites ( Fig. 1C View Figure 1 ). Cephalon ( Fig. 1D View Figure 1 ) with lateral lobes welldeveloped, frontal line present, suprantennal line bent downwards on middle; eyes composed of eight ommatidia. Pleonites 3–5 epimera outline continuous with that of pereonite 7, acute and directed backwards. Pereonites bearing glandular pores ( Fig. 1E View Figure 1 ). Telson ( Fig. 1F View Figure 1 ) triangular, lateral sides strongly concave, apex acute. Antennula ( Fig. 1G View Figure 1 ) with articles subequal in length, distal article bearing many aesthetascs on distal margin. Antenna ( Fig. 1H View Figure 1 ) stout, not reaching the posterior margin of pereonite 1; flagellum of three articles subequal in length, second and third articles with lateral aesthetascs. Mandibles with molar penicil of 12 branches, left mandible ( Fig. 2A View Figure 2 ) with 2+1 penicils, right mandible ( Fig. 2B View Figure 2 ) with 1+1 penicils. Maxillula ( Fig. 2C View Figure 2 ) inner endite with two long hairy penicils, distal margin slightly triangular; outer endite of 4+5 teeth (2 or 3 slightly cleft on apex) plus accessory tooth and slender setae between inner and outer set of teeth. Maxilla ( Fig. 2D View Figure 2 ) outer lobe slightly wider than inner lobe, covered with thin setae; inner lobe rounded, covered with thick setae. Maxilliped ( Fig. 2E View Figure 2 ) endite subrectangular, distal margin slightly rounded, medial seta surpassing distal margin, small knob-like penicil on ventral margin without minute setae. Pereopods 1–7 short and stout, carpus 1 with longitudinal antennal grooming brush, pereopod 6 ischium and merus, and pereopod 7 base with water conducting system; dactylus with inner claw about half of outer claw length, ungual and dactylar seta simple. Uropod ( Fig. 2F View Figure 2 ) protopod subquadrangular, protopod and exopod grooved on outer margin bearing glandular pores, endopod inserted proximally, exopod and endopod subequals in length. Pleopods 1–5 exopods with large respiratory areas.
Male: Pereopods1–5merus and carpus densely fitted with long setae on sternal margin ( Fig. 3A View Figure 3 ); pereopod 7 ischium slightly depressed on proximal sternal margin
Campos-Filho et al. New species of Alloniscus from Brazil bearing many setae ( Fig. 3B View Figure 3 ). Genital papilla ( Fig. 3C View Figure 3 ) with triangular frontal shield and two subapical orifices. Pleopod 1 exopod ( Fig. 3D View Figure 3 ) heart-shaped bearing many setae on inner and outer margins; endopod ( Fig. 3C View Figure 3 ) almost twice as long as exopod, distal portion narrow bearing small setae on median margin. Pleopod 2 ( Fig. 3E View Figure 3 ) exopod triangular, outer margin strongly concave bearing many setae; endopod flagelliform, longer than exopod. Pleopod 3 and 4 exopods as in Fig. 3F, G View Figure 3 . Pleopod 5 exopod ( Fig. 3H View Figure 3 ) triangular, outer margin slightly convex bearing many setae, distal portion right-angled.
Etymology. The new species is named after Professor Dr. Ludwig Buckup for his contributions to the knowledge of Crustacea.
Remarks. As mentioned, the genus Alloniscus includes 23 species: Alloniscus allspachi Nunomura, 2001 from Saipan Island, Micronesia; Alloniscus balssi ( Verhoeff, 1928) from Japan and Korea; Alloniscus boninensis Nunomura, 1984 from Bonin Islands, Japan; Alloniscus gerardi Arcangeli, 1960 from Dar-es-Salaam, Tanzania; Alloniscus maculatus Nunomura, 1984 from Yonakuni Island, Okinawa, Japan; Alloniscus marinus Collinge, 1920 from South Africa; Alloniscus mirabilis ( Stuxberg, 1875) from California, USA; Alloniscus nacreus Collinge, 1922 from Madagascar; Alloniscus nicobaricus Budde-Lund, 1885 from Nicobar, Maldives and Andaman Islands, Indian Ocean; Alloniscus oahuensis Budde-Lund, 1885 from tropical coastal regions of the Indian and Pacific oceans; Alloniscus pallidulus Budde-Lund, 1885 from Australia, Indonesia, Malaysia and province of West Papua; Alloniscus pardii Arcangeli, 1960 from Indochina; Alloniscus perconvexus Dana, 1856 from Pacific coast of Canada to Mexico; Alloniscus pigmentatus Budde-Lund, 1885 from Madagascar, Indian Ocean (Aldabra, Chagos, Comoro, Maldives, and Seychelles), Mozambique and southern China; Alloniscus priolensis Arcangeli, 1960 from Priole Island, east coast of Sumatra; Alloniscus robustus Ferrara, 1974 from Sar Uanle, Somalia; Alloniscus ryukyuensis Nunomura, 1984 from Ryukyu Island, Japan; Alloniscus saipanensis Nunomura, 2001 from Saipan Island, Micronesia; Alloniscus salinarum Vandel, 1968 from Guayas, Ecuador; Alloniscus schaedleri Arcangeli, 1960 from Indonesia; Alloniscus silvestrii Arcangeli, 1960 from Taiwan; Alloniscus thalassophilus Rioja, 1964 from Guerrero, Mexico; and “ Alloniscus ” simplex Schmölzer, 1974,with dubious genus allocation (Fig.4) (see references in Schmalfuss, 2003).
The material of the new species was collected during a drizzle, which seems to have enable the animals to be exposed to the environment and becoming visible. Probably, this endogenous behaviour occurs in response to water loss due the high solar intensity of the place.
Alloniscus buckupi n. sp. differs from their congeners by antennula with aesthetascs inserted distally, shape of male pereopod 7 ischium, and shape of male pleopods 1–5.
As mentioned by Schmidt (2008), a taxonomic revision of the genus is necessary to determine the actual number of species. In addition, such revision would provide a better understanding of the morphological characteristics of the genus into an actual taxonomic context.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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