Euryalid brittle stars from the International Indian Ocean Expedition 1963 - 64 (Echinodermata: Ophiuroidea: Euryalida)
Author
Baker, Alan N.
Author
Okanishi, Masanori
Author
Pawson, David L.
text
Zootaxa
2018
2018-03-08
4392
1
1
27
journal article
28700
10.11646/zootaxa.4392.1.1
6251bf04-bedf-44cf-92b2-73e551eb56f6
1175-5326
1194434
B6A80A66-E868-4578-A5E5-655E0F18AA84
Astroboa clavata
(
Lyman, 1861
)
(
Fig. 5D–J
)
Astrophyton clavatum
Lyman, 1861
: 85
.
Astroboa clavata
.
—
Döderlein, 1911
: 80
. Pl. 5, figs 6,6a; 1912: 269, pl.16, figs 1, 1b, 16, pl. 18, fig. 8; 1927: 38, pl.5, figs 5,6;
Putchakarn and Sonchaeng, 2004
: 421
;
Venkatraman
et al
, 2013
: 208
.
Material Examined.
Anton Bruun
Cruise 9,
Indian Ocean
,
Comoro islands
,
Mayotta Island
,
Bandeli Reef
,
13° 30’ S
,
045°16’ E
, 23
–
26
November 1964, 1
specimen, now lost
;
USNM 1072477
,
Anton Bruun
Cruise
9
Station
465, off NE
Somalia
,
11° 37’ N
51° 27’ E
,
67–72 m
, 18
December 1964, 1
specimen (
Fig. 5D–J
).
Remarks.
This species is characterised by having prominent radial shields and a covering of minute thorny granules (
Fig. 5D, F, G
). Similar granules extend into the oral interbrachial areas.
The arm segments are separated by marked depressions with thickened edges (
Fig. 5H
). There is also a median furrow along the aboral sutures of each arm (
Fig.
5I
). Girdle bands with hooklets occur terminally on each arm (
Fig. 5J
).
A. clavata
was first collected off
Zanzibar
, and has subsequently been found in the waters of the Persian Gulf,
Bay
of Bengal,
Mauritius
, and northwestern
Australia
(
Rowe & Gates, 1995
).