Heteromesus frigidus , Hansen 1916

• Main Authors: Cunha, Marina R., Wilson, George D. F.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Ischnomesidae; Heteromesus; Heteromesus frigidus; Iceland; Norwegian Sea
• Online Access: https://doi.org/10.5281/zenodo.5064420; http://treatment.plazi.org/id/EB65B41CFFBCE4236A4DFCDBD77F94D8

Heteromesus frigidus Hansen, 1916 (Figs 15–16) Heteromesus frigidus Hansen 1916: 71–72, pl. VI, figs 4a–t; Gurjanova 1932: 46, tabl. XVI, 57, 1933: 411, 1964: 259; Menzies 1962: 122; Wolff 1962: 73, 85, 216, 260; Svavarsson 1984: 35; Kussakin 1988: 478–480, figs. 391–392. Material examined Syntypes: 12 females, 2 males, 1 manca III male, 6 manca, Norwegian Sea, north of the Faeroes, 63°36’N, 7°30’W, 1895–1896, R / V Ingolf, stn 139, 1322 m (702 Danish fathoms) (ZMUC CRU­9234); 1 female, 1 manca III female, 2 manca III males, 11 manca, several fragments, same locality, 63°22’N, 6°58’W, 1895–1896, R / V Ingolf, stn 141, 1279 m (679 Danish fathoms) (ZMUC CRU­9235); 1 female, Norwegian Sea, East of Iceland, 66°23’N, 12°05’W, 1895–1896, R / V Ingolf, stn 101, 1012 m (537 Danish fathoms) (ZMUC CRU­9236). 1 female, 1 manca, same locality, 66°23’N, 10°26’W, 1895–1896, R / V Ingolf, stn 102, 1413 m (750 Danish fathoms) (ZMUC CRU­6468); 1 female, same locality, 65°34’N, 7°31’W, 1895–1896, R / V Ingolf, stn 105, 1435 m (762 Danish fathoms) (ZMUC CRU­3764); 5 females, 4 manca, 1 fragment (head), Norwegian Sea, North of Iceland, 67º40’N, 15º40’W, 1895–1896, R / V Ingolf, stn 124, 932 m (495 Danish fathoms) (ZMUC CRU­9233). Remarks on type material. Numerous syntype specimens, mostly mancae and females and only two males in CRU­ 9234. Several females and mancae were intact but most were mutilated or fragmented specimens. The male illustrated here is lacking part of the left antenna and the right uropod. The other male lacked pleopods; these were possibly removed by Hansen for illustration. An intact female from the same sample (CRU­ 9234) was selected for the illustration. Diagnosis Pereonite 1 in female with no median dorsal tubercles or spines; pereonite 5 in female length 2.2 width. Male with rook spines on peronites 1–4. Pereonite 5 in female length 2.2 width, in male length 4.4 width. Pleotelson posterolateral margin anterior to uropods without spines or tubercles. Antennula with 3 articles altogether. Pereopods II– VII ...