Asterostegus Mortensen, 1933

Okanishi, Masanori & Fujita, Toshihiko, 2014, A taxonomic review of the genus Asterostegus (Echinodermata: Ophiuroidea), with the description of a new species, European Journal of Taxonomy 76, pp. 1-18 : 3-4

publication ID

https://doi.org/ 10.5852/ejt.2014.76

publication LSID

lsid:zoobank.org:pub:01BEFFB2-2E53-4B1E-A7BC-36702313BBF8

DOI

https://doi.org/10.5281/zenodo.3851749

persistent identifier

https://treatment.plazi.org/id/03917D3B-D906-F771-B730-7A56FA810A29

treatment provided by

Tatiana

scientific name

Asterostegus Mortensen, 1933
status

 

Genus Asterostegus Mortensen, 1933 View in CoL

Asterostegus Mortensen, 1933a: 4, 40; 1933b: 297.

Asterostegus – Fell 1960: 10. — McKnight 2003: 385-386.

Type species: Asterostegus tuberculatus Mortensen, 1933 View in CoL , by monotypy.

Diagnosis

Arms simple, not branching. Tubercles present on radial shields and aboral arms. Oral interradial plates present on distal side of adoral shields. Teeth triangular. Oral papillae domed, granule-shaped, present laterally on the jaws. Tentacle pores with two (rarely three) arm spines from fourth arm segment. Oral side of vertebrae with an oral bridge. Lamina of distal arm spines smooth.

Remarks

Based on this study, Asterostegus is currently composed of three species, A. sabineae sp. nov., A. maini McKnight, 2003 and A. tuberculatus Mortensen, 1933 . A tabular key to the species of Asterostegus is provided ( Table 1 View Table 1 ).

Species of this genus are distributed in the Indian Ocean, off Madagascar ( Mortensen 1933b) and in the Western Pacific, south-east of New Caledonia ( McKnight 2003), at a depth of 382-500 m ( Fig. 1 View Fig ).

Table 1. A tabular character key to the species of Asterostegus.

  Tubercles on aboral surface of the disc Numbers and arrangement of oral interradial plates
Species Number and arrangement of tubercles on aboral disc Number of tubercles on top of each lateral bar Length of tubercles on periphery of radial shields
A. sabineae sp. nov. Two to four, in a line on the radial shield One or two ca. 1–1.2 mm One in each interradius
A. maini McKnight, 2003 Ca. 10, only on periphery of radial shield Three to five ca. 250–300 µm Three to five arranged in one row
A. tuberculatus Mortensen, 1933 Scattered over entire radial shield and peripheral part of aboral disc Two or three ca. 350 µm Five to eight arranged in two rows

Kingdom

Animalia

Phylum

Echinodermata

Class

Ophiuroidea

Order

Euryalida

Family

Euryalidae

Loc

Asterostegus Mortensen, 1933

Okanishi, Masanori & Fujita, Toshihiko 2014
2014
Loc

Asterostegus Mortensen, 1933a: 4 , 40
1933b: 297
Fell 1960: 10
McKnight 2003: 385-386
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