Spectrarcturus hystrix Stransky & Svavarsson & Poore & Kihara 2020, comb. nov.

• Main Authors: Stransky, Bente, Svavarsson, Jörundur, Poore, Gary C. B., Kihara, Terue Cristina
• Format: Text
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Arcturidae; Spectrarcturus; Spectrarcturus hystrix; Greenland; Pacific; Norway; Jörundur; Nordic Seas; North Atlantic; Sakhalin
• Online Access: https://dx.doi.org/10.5281/zenodo.4332812; https://zenodo.org/record/4332812

Spectrarcturus hystrix (Sars, 1877) comb. nov. (Figs 29–30) Arcturus hystrix Sars, 1877: 250–251 (erroneously labelled 350–351).— Sars, 1885: 104–106, pl. IX, figs 23–26.— Norman, 1904: 446. Pleuroprion hystrix. — Hansen, 1916: 194–195, pl. XV, fig. 6a–b.— Gurjanova, 1936: 200, fig. 128.— Kussakin, 1982: 421–424, figs 313–314. Material examined: Syntypes , F1683, Norwegian North-Atlantic Expedition 1876–1878, stations 18, 124, 164, 4 females. Other material . Female, WH 233, stn. 1023; male, Voucher 52975, POS 456 IceAGE 2, stn. 873-6 EBS from DZMB 43.916. Diagnosis: Body with several long and slender, bluntly pointed spines; pair on anterior part of head; posteriorly row of spines across head; pereonite 1 with row of spines across pereonite; pereonites 2 and 3 with row of spines across pereonites; two rows of spines on pereonite 4; pereonite 4 0.2 times body length; trapezoid, 2.1 times longer than third pereonite. Pleotelson intermediate in length, with 5 pairs of long and slender spines near midline of pleotelson, lateral margins with spines; posterior part of pleotelson tapering towards bifid apex; pleotelson upturned distally. Antennula short, reaching little beyond distal end of second peduncular segment of antenna. Antenna short, about 0.6 of total body length; slender, with 3 large spines on second segment; large spine laterodistally on third segment, spine laterodistally on fourth segment. Spines present on basis of pereopods 5–7. Oostegites present on pereopod 1–5. Male smaller than female. Pattern of spination as in females, spines smaller than in females and more robust; middle part of pereonite 4 narrow, without spines. Posterior part of pleotelson tapering towards bifid apex; cleft of apex not as pronounced an in females. Endo- and exopod fringed with fine setae, distally with plumose setae; endopod with 7 setae; exopod with 11 setae; endopod slightly longer than exopod; pleopod 2 appendix masculina long and curved in distal half, about 1/3 longer than expodite, fringed with fine setae. Remarks: The species differs from all other Spectrarcturus species in the pattern of spination of the body. Other characteristics are the shape of the pleotelson and the long distolateral spine on article 3 of the antenna. Distribution: Northernmost North Atlantic, Nordic Seas: the Faeroe Islands, Norway, Greenland, at depths between 600–1150 m (Hansen 1916). : Published as part of Stransky, Bente, Svavarsson, Jörundur, Poore, Gary C. B. & Kihara, Terue Cristina, 2020, Revision of Pleuroprion zur Strassen, 1903 (Holidoteidae) and re-evaluation of Spectrarcturus Schultz, 1981 (Arcturidae) (Crustacea, Isopoda, Valvifera), pp. 1-52 in Zootaxa 4894 (1) on pages 37-42, DOI: 10.11646/zootaxa.4894.1.1, http://zenodo.org/record/4315364 : {"references": ["Sars, G. O. (1877) Prodromus descriptionis crustaceorum et pycnogonidarum, quae in expeditione norvegica anno 1876 observavit. Archiv for Mathematik og Naturvidenskab, 2, 237 - 271.", "Sars, G. O. (1885) Den Norske Nordhavs-expedition, 1876 - 1878. Vol. 6. Zoology, Crustacea, 1, 1 - 280.", "Norman, A. M. (1904) British Isopoda of the families Aegidae, Cirolanidae, Idoteidae, and Arcturidae. Annals and Magazine of Natural History, Series 7, 14, 430 - 450. https: // doi. org / 10.1080 / 03745480409443033", "Hansen, H. J. (1916) Crustacea Malacostraca III, Isopoda. The Danish Ingolf Expedition, 3 (5), 1 - 262.", "Gurjanova, E. F. (1936) Isopodes des Mers Orienalis. Fauna de L'URSS, Crustacees, 7 (3), i-XII + 1 - 279. [in Russian, Summary in German]", "Kussakin, O. G. (1982) Morskye I solonovatovodnye ravnonogie rakoobrasnye (Isopoda) cholodnix I umerennix vod severnogo polushariya [Marine and brackish water like-footed crustaceans (Isopoda) of cold and temperate waters of the North- ern Hemisphere]. Podotryadi Anthuridea, Microcerberidea, Valvifera, Tyloidea. Opredeliteli po Faune SSSR, Izdavaemye Zoologicheskim Institutom Akademii Nauk SSSR, 131 (2), 1 - 463. [in Russian]", "Gurjanova, E. F. (1955) The isopod crustacean fauna (Isopoda) of the Pacific Ocean VI. New species of Valvifera from the Kurile-Sakhalin Region. Trudy Instituta Zoologii Akademia Nauk USSR, 21, 208 - 230. [in Russian]"]}