Spectrarcturus hystrix (Sars 1877) Stransky, Svavarsson, Poore, and Kihara 2020
- Dataset
- Revision of Pleuroprion zur Strassen, 1903 (Holidoteidae) and re-evaluation of Spectrarcturus Schultz, 1981 (Arcturidae) (Crustacea, Isopoda, Valvifera)
- Rank
- SPECIES
- Published in
- 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). Zootaxa 4894 (1): 1-52, DOI: 10.11646/zootaxa.4894.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Isopoda
- family
- Arcturidae
- genus
- Spectrarcturus
- species
- Spectrarcturus hystrix
description
(Figs 29 – 30)
diagnosis
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.
discussion
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
Distribution: Northernmost North Atlantic, Nordic Seas: the Faeroe Islands, Norway, Greenland, at depths between 600 – 1150 m (Hansen 1916).
materials_examined
Material examined: Syntypes, F 1683, 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.