Haploniscus monoceros, Brökeland, Wiebke, 2010
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publication ID |
https://doi.org/ 10.5281/zenodo.196630 |
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DOI |
https://doi.org/10.5281/zenodo.6209455 |
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persistent identifier |
https://treatment.plazi.org/id/03D1713A-1C25-922D-9AE8-FF4D7EEF43B4 |
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treatment provided by |
Plazi |
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scientific name |
Haploniscus monoceros |
| status |
sp. nov. |
Haploniscus monoceros View in CoL n. sp.
( Figs 6–8 View FIGURE 6 View FIGURE 7 View FIGURE 8 )
Holotype: DIVA 2-HA549, adult male, length 1.66 mm, coll.: RV Meteor, M63/2, DIVA 2 expedition, MUC station 99, 0°37.20’ N 6°28.14’ W, 5167 m, Guinea Basin, southeast Atlantic, ZMH K- 42429.
Paratype: DIVA 2-HA234, adult male (stage VI), length 1.67 mm, coll.: RV Meteor, M63/2, DIVA 2 expedition, EBS station 89-6, 0°42.95’ N 5°31.29’ W, 5142 m, Guinea Basin, ZMH K- 42430.
Etymology. Monoceros is the Greek name of the constellation “Unicorn” and alludes to Haploniscus unicornis (Latin “single-horned”), the eponymous species of the complex.
Diagnosis. Rostrum length 0.5 head length. Pereonites 3–5 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 0.8 total length, neck width 0.3 maximum width. Pleopod 2 endopod only slightly elongated, total length 1.3 protopod length, 6.0 width; article 2 length 3.5 article 1 length.
Description (stage VI male). Body ( Fig. 6 View FIGURE 6 A–F) length 2.7 width. Head length 0.7 width. Posterior angles of pereonites 2–7 and anterior angles of pereonites 3–5 acute. Pleotelson length 0.3 body length, 0.8 width.
Antenna 1 ( Fig. 7 View FIGURE 7 G) peduncular article 1 length 1.6 width, with 3 penicillate setae distally; article 2 length 1.3 article 1 length, 2.45 width, with1 simple and 4 penicillate setae distally; article 3 length 0.3 article 1 length, width 0.5 article 1 width, with 2 simple setae distally. Flagellum with 4 articles; article 1 shortest, with 2 penicillate setae; article 2 longest, about 2.8 article 1 length, with 1 aesthetasc and 1 simple seta; article 3 with 2 aesthetascs and 1 simple seta, article 4 with 3 aesthetascs (one broken off), 2 simple setae and 1 small penicillate seta.
Antenna 2 ( Fig. 7 View FIGURE 7 F) peduncular article 2 with 2 simple setae; article 3 length 1.9 width, with 2 long simple setae dorsally, dorsal tooth with 2 simple setae; article 4 0.6 article 3 length, 1.1 width, with 2 simple setae distally; distal articles missing.
Pereopods ( Figs 7 View FIGURE 7 A–E; 8C, D): Basis of all pereopods with 2 long simple setae ventrally; basis of pereopods 2 and 3 with 2 penicillate setae, of pereopods 4–7 with 3 penicillate setae dorsally (2 broken off on pereopod 6). Ischium with 1–2 simple setae dorsally and ventrally each. Merus with 2 setae of different length distoventrally; pereopod 1 with 4, pereopod 2 with 3, pereopods 3–7 with 2 setae distodorsally, 1 dorsal seta of pereopod 1 long and stout. Carpus with 2 or 3 simple setae ventrally; pereopods 1–6 with 1 short simple seta (broken off on pereopod 7) distodorsally, pereopods 2–7 with 1 penicillate seta (broken off on some pereopods) distodorsally. Propodus with 3–5 setae ventrally, peropods 1–3 with 1 simple seta distodorsally (broken off on remaining pereopods), pereopods 2–7 with 1 penicillate seta distodorsally. Dactylus of pereopod 1 with 5, of pereopods 2–3 with 4 and of pereopods 6–7 with 2 setae near insertion of unguis (distal propodus and dactylus missing on pereopods 4 and 5).
Pleopod 1 ( Fig. 8 View FIGURE 8 A) length 0.8 pleotelson length, about 2.3 width; widest part after about 0.20 of its length.
Pleopod 2 ( Fig. 8 View FIGURE 8 B) protopod length 1.9 width, with about 9 long setae along outer margin.
Pleopod 3 ( Fig. 8 View FIGURE 8 E) endopod length 1.6 width. Exopod length 0.7 endopod length, 2.0 width.
Pleopod 4 ( Fig. 8 View FIGURE 8 F) endopod length 2.1 width. Exopod length 0.6 endopod length, 3.1 width, plumose seta length about 1.7 exopod length.
Pleopod 5 ( Fig. 8 View FIGURE 8 G) length 2.4 width.
Uropod ( Fig. 6 View FIGURE 6 E) extending beyond posterior margin, not reaching tips of pleotelson processes.
Distribution. Found in the Guinea Basin, Southeast Atlantic.
| ZMH |
Zoologisches Museum Hamburg |
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.