Proscina vinogradovi Shih &amp; Hendrycks 1996
Creators: name: Zeidler, Wolfgang
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Proscinidae
Proscina
Proscina vinogradovi

description: <i>Proscina vinogradovi</i> Shih &amp; Hendrycks, 1996 (Fig. 6) <i>Proscina vinogradovi</i> Shih &amp; Hendrycks, 1996: 592–596, figs. 1–3. <b>Type material.</b> This species was described from a sub-adult male, 4.7 mm in length (head to end of inner ramus of U3), from the North Pacific, off the Alaskan Peninsula (54°40’N 155°10’W); 700–900 m, 14 April 1930. The unique holotype is in the USNM (264246); the mouthparts and appendages from the right side, including the telson, are mounted on a microscope slide; the remainder is preserved in alcohol. <b>Material examined.</b> The unique type as detailed above. <b>Diagnosis.</b> Following examination of the holotype male, 4.7 mm, and according to Shih &amp; Hendrycks (1996). Pereon not inflated. Head rounded dorsally, without rostrum. Antennae 1 as long as head and first four pereonites combined; callynophore lanceolate, with serrated margins and numerous aesthetascs. Antennae 2 slightly shorter than first peduncular article of A1, consisting of three small articles. Gnathopod 1; basis relatively short, length 0.6x remaining articles combined, 1.6x carpus; propodus length about 1.4x carpus, with numerous long setae on lateral and medial surfaces, especially for distal half; dactyl relatively straight, length about one-third propodus. Gnathopod 2 slightly longer than G1; basis length twice carpus, similar in length to propodus; propodus slightly expanded medially with distinct postero-distal excavation, forming palm for dactyl, posterior margin and palm armed with several, relatively strong setae; dactyl strong, curved, length slightly more than one-third propodus. Pereopods not particularly slender. Pereopods 3 &amp; 4 similar in length and structure; basis length twice merus; carpus length about 1.4x merus; propodus as long as carpus, with few long setae on antero-distal corner; dactyl relatively strong, curved, length about one-quarter propodus. Pereopod 5 slightly more slender than P4 but of similar length; basis length twice merus; carpus length 1.3x merus; propodus as long as carpus, with tuft of long setae on postero-distal corner; dactyl curved, length 0.2x propodus. Pereopod 6 similar in length to P5; basis length almost twice merus; carpus length 1.3x merus; propodus length 0.8x carpus, armed with setae as for P5; dactyl as for P5. Pereopod 7 slightly shorter than P6; basis length 2.6x merus; merus relatively short, about 2.5x ischium; carpus slightly broader than other articles, length marginally more than twice merus; propodus length 0.7x carpus, armed with setae as for P6; dactyl as for P6 but slightly longer. Uropoda with lanceolate rami, with serrated margins; all with inner ramus distinctly longer than outer; both longer than peduncle. Uropod 1; inner ramus length 1.4x outer, almost twice peduncle. Uropod 2; inner ramus length 1.4x outer, and 1.6x peduncle. Uropod 3; inner ramus length 1.3x outer, and 1.9x peduncle; peduncle width marginally more than half length. Telson with rounded apex, 1.3x as long as broad, about half length of peduncle of U3. Colour not known for living specimen. <b>Remarks.</b> This species resembles <i>Mimonectes sphaericus</i> Bovallius, 1885 in many respects, particularly in regard to the characters listed by Shih &amp; Hendrycks (1996) to distinguish this species from other members of <i>Proscina</i>. Namely, the excavation on the distal margin of the outer lobe of the maxilliped; the propodus of gnathopod 2 is excavate postero-distally and is relatively long, about twice as long as the carpus and as long as the basis; the merus of pereopod 7 is relatively short and the carpus is relatively broader than in other pereopods. It differs primarily from <i>M. sphaericus</i> in having pereopods 3–7 with more robust dactyls and with a relatively longer propodus that is not especially tapering distally. With respect to the stronger dactyls, it also resembles <i>Mimonectes neosphaericus</i> <b>sp. nov.</b>, but in that species gnathopod 1 is sub-chelate and pereopods 3 &amp; 4, especially pereopod 4, are significantly longer than pereopods 5–7. Shih &amp; Hendrycks (1996) also note the similarity of <i>P. vinogradovi</i> to the specimen of <i>P. stephenseni</i> illustrated by Vinogradov (1957), which I believe most likely represents <i>M. sphaericus,</i> as noted previously. Thus, in consideration of the above, the status of <i>P. vinogradovi</i> is questionable but should be maintained pending the availability of more material of this, and related species. It is here transferred to the genus <i>Mimonectes</i>. <b>Distribution.</b> Known only from the type locality, from the unique type, as detailed above.
description: Published as part of <i>Zeidler, Wolfgang, 2012, A review of the hyperiidean amphipod families Mimonectidae and Proscinidae (Crustacea: Amphipoda: Hyperiidea: Scinoidea) 3533, pp. 1-74 in Zootaxa 3533</i> on pages 16-17
description: {"references": ["Shih, C. - T. &amp; Hendrycks, E. A. (1996) Proscina vinogradovi, new species, and Cheloscina antennula, new genus, new species (Amphipoda; Hyperiidea: Proscinidae) from the eastern North Pacific. Journal of Crustacean Biology, 16 (3), 591 - 601.", "Bovallius, C. (1885) Mimonectes, a remarkable genus of Amphipoda Hyperiidea. Nova acta Regiae Societatis scientiarum Upsaliensis, ser. III, 13, 1 - 15, plates 1 - 3.", "Vinogradov, M. E. (1957) Hyperiids (Amphipoda) of the Northwest Pacific Ocean. 1. Tribe Hyperiidea Physosomata. Trudy Instituta Okeanologii Akademiya Nauk SSSR, 20, 186 - 227. [In Russian]. English translation by American Institute of Biological Sciences, Washington D. C., 1959, Marine Biology, 149 - 184."]}