Haploniscus angolensis Brökeland, 2010, n. sp.
Creators: name: Brökeland, Wiebke
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Haploniscidae
Haploniscus
Haploniscus angolensis

description: Haploniscus angolensis n. sp.
(Figs 12–14)
Holotype: DIVA 1-HA213, adult male (stage VI), length 1.64 mm, coll.: RV Meteor, M48/1, DIVA 1 expedition, EBS station 344, 17°06.2’ S 4°41.7’ E, 5415 m, Angola Basin, southeast Atlantic, ZMH K- 42436.
Paratypes: DIVA 1-HA75, adult male, length 1.72 mm, same locality as holotype, ZMH K- 42437. DIVA 1-HA179, adult male, length 1.72 mm, coll.: RV Meteor, M48/1, DIVA 1 expedition, EBS station 348, 16°18.1’ S 5°27.2’ E, 5390 m, Angola Basin, ZMH K- 42438.
Etymology. Named after the type locality in the Angola Basin.
Diagnosis. Rostrum 0.5 head length. Pereonites 4 and 5 broadest, body tapering slightly anteriorly and posteriorly. Lateral margins of pleotelson tapering posteriorly; pleotelson process length 0.5 pleotelson length, 1.9 width. Pleopod 1 lateral margins tapering continuously into neck; distance basal margin–neck 0.7 total length, neck width 0.45 maximum width. Pleopod 2 endopod length 1.1 protopod length, 5.2 width; article 2 length 2.85 article 1 length.
Description (stage VI male). Body (Fig. 12 A–D) length 2.5 width. Head length 0.6 width. Posterior angles of pereonites 2–7 and anterior angles of pereonites 2–5 acute. Pleotelson length 0.3 body length, 0.8 width.
Antenna 1 (Fig. 13 B) peduncular article 1 length 1.5 width, with 3 penicillate setae and 1 simple seta distally; article 2 length 1.2 article 1 length, 2.0 width, with 3 penicillate setae distally; article 3 length 0.4 article 1 length, width 0.4 article 1 width, with 1 simple seta distally. Flagellum with 4 articles; article 1 shortest, with 1 penicillate seta; articles 2–4 of subequal length, about 2.9 article 1 length, articles 2 and 3 with 1 aesthetasc and 1 simple seta each; article 4 with 4 aesthetascs, 2 simple setae and 1 small penicillate seta.
Antenna 2 (Fig. 13 A) peduncular article 2 with 1 simple seta; article 3 length 1.65 width, dorsal tooth, with 2 simple setae (one broken off); article 4 0.6 article 3 length, 0.9 width; article 5 length 1.3 article 3 length, 2.2 width; article 6 length 1.5 article 3 length, 4.2 width, with at least 3 penicillate setae. Flagellum with 10 articles, each article with up to 6 simple setae.
Pereopods (Figs 13 C–G; 14A, B): Basis of all pereopods with 2 long simple setae ventrally; basis of pereopods 2–4 with 1–2 penicillate setae, of pereopods 5 and 6 with 2 or 3 penicillate setae, of pereopod 7 with 1 penicillate seta dorsally. Ischium with 1–2 simple setae dorsally and ventrally each. Merus with 2 setae of different length distoventrally and distodorsally. Carpus with 2 or 3 simple setae ventrally; distal carpus of pereopods 1–4 with 1 short simple seta (broken off on pereopods 5–7) dorsally, pereopods 2–7 with 1 penicillate seta (broken off on pereopod 3) distodorsally. Propodus with 3–5 setae ventrally, peropods 2–4 with 1 simple seta distodorsally (broken off on remaining pereopods), pereopods 2–7 with 1 penicillate seta distodorsally (broken off on some pereopods). Dactylus of pereopods 1 and 2 with 5, of pereopods 3–4 with 4 and of pereopods 5–7 with 1–2 setae near insertion of unguis.
Pleopod 1 (Fig. 14 D) length 0.7 pleotelson length, about 2.1 width; widest part after 0.15 of its length.
Pleopod 2 (Fig. 14 E) protopod length 1.8 width, with about 8 long setae along outer margin.
Pleopod 3 (Fig. 14 C) endopod length 2.2 width. Exopod length 0.7 endopod length, 1.9 width.
Pleopod 4 (Fig. 14 F) endopod length 1.8 width. Exopod length 0.6 endopod length, 2.7 width, plumose seta length about 1.8 exopod length.
Pleopod 5 (Fig. 14 G) length 1.9 width.
Uropod (Fig. 12 D) extending beyond posterior margin, not reaching tips of pleotelson processes.
Diagnosis. Found in the Angola Basin, Southeast Atlantic.
description: Published as part of Brökeland, Wiebke, 2010, Description of four new species from the Haploniscus unicornis Menzies, 1956 complex (Isopoda: Asellota: Haploniscidae), pp. 1-35 in Zootaxa 2536 on page 21, DOI: 10.5281/zenodo.196630