New records of deepsea spider crabs of the genus Cyrtomaia Miers, 1886, from the Pacific Ocean, with description of a new species (Crustacea: Decapoda: Brachyura: Majidae)
Author
Forges, Bertrand Richer De
Author
Ng, Peter K. L.
text
Zootaxa
2008
1861
17
28
journal article
10.5281/zenodo.183679
601caac8-7023-4c2c-997e-42fd7524058e
11755326
183679
Cyrtomaia ericina
Guinot & Richer
de Forges, 1982
Cyrtomaia ericina
Guinot & Richer
de
Forges, 1982a
: 1089, fig. 1, 5A, B. pl. II, 3, 3a, 3b. Guinot & Richer de
Forges 1982b
: 18, figs. 8, 9, 17 A, B, B1. –
Griffin & Tranter 1986
: 29.
–
Ng et al. 2008: 111.
Material examined
.
Tonga
: BORDAU 2, stn. CP 1575,
19°41.75’S
–
174°21.21’W
,
232–295 m
,
11 June 2000
:
1 male
(11.1 x
12.2 mm
) (MNHNB30733). – Stn.
CH
1579,
19°41.88’S
–
174°26.05’W
,
332 m
,
11 June 2000
:
5 males
(14.0 x 17.0 mm, 16.2 x 24.0 mm, 17.2 x
22.2 mm
, 14.0 x 16.0 mm, 13.2 x
16.8 mm
),
1 female
(16.8 x
22.9 mm
),
3 juveniles
(12.2 x
15.6 mm
, 14.0 x 16.0 mm, 11.0 x 13.0 mm) (MNHNB30734). – Stn. CP 1641,
21°09.31’S
–
175°22.04’W
,
395 m
,
21 June 2000
:
3 males
(15.1 x
22.7 mm
, 14.1 x
19.8 mm
, 9.0 x 13.0 mm) (
ZRC
2008.0745).
Remarks
. This species belongs to the group of
Cyrtomaia
species which have a preocular spine. The first species of this group that was described,
C. murrayi
Miers, 1886
, was collected by the
Challenger
Expedition in
Indonesia
but has since been reported from
Philippines
,
Taiwan
and
Japan
(
Sakai 1976
; Guinot & Richer de
Forges 1986
;
Ng & Huang 1997
; Richer de Forges & Ng 2007b). Guinot and Richer de
Forges (1982a)
described another smallsize species from
New Caledonia
,
C. ericina
. The main differences between these two species are the presence of one supraorbital sharp spine in
C. murrayi
(a small tubercule in
C. ericina
) and the presence of spinules on P4 and P5 carpi in
C. murrayi
(smooth in
C. ericina
) (Guinot & Richer de
Forges 1982b
: 18, 20, figs. 6, 8A).
The material examined of
C. ericina
is from
Tonga
, more than
2000 km
to the east of
New Caledonia
. A detailed study of the specimens from
Tonga
attributed to
C. ericina
and numerous specimens of
C. murrayi
from the
Philippines
reveals more differences. There is one large supraorbital spine in
C. murrayi
(in contrast to a small spine in
C. ericina
), the ambulatory legs are relatively stronger and more spiny in
C. murrayi
than in
C. ericina
, the P3 propodus of
C. murrayi
has a row of very long spines on the lower border (only seven relatively shorter spines in
C. ericina
), the P3 carpus has 18 spines on the upper border (eight in
C. ericina
), the P4 carpus is spiny along the entire upper border (only three small spines in
C. ericina
), the P5 carpus is spiny (smooth in
C. ericina
), and the basal antennal article has three teeth (two in
C. ericina
).