Taxonomic revision of the genus Paramunida Baba, 1988 (Crustacea: Decapoda: Galatheidae): a morphological and molecular approach
Author
Cabezas, P. E.
text
Zootaxa
2010
2010-12-03
2712
1
60
journal article
11755334
Paramunida stichas
Macpherson, 1993
(
Figs. 15E
,
18G
)
Paramunida stichas
Macpherson, 1993: 465
, figs 9, 15 (in part,
New Caledonia
,
Philippines
,
Fiji
and
Japan
,
210–590 m
); 1996: 417 (SW Pacific (Field Bank,
Wallis
Islands, and Bayonnaise Bank),
400–430 m
); 2004: 290 (
Fiji
and
Tonga
,
371-591 m
). —
Baba 2005: 304
(key, synonymies). —
Poore
et al.
2008: 22
(SW
Australia
,
388–404 m
). —
Baba
et al.
2008: 174
(list of occurrences).
Not
Paramunida stichas
Macpherson, 1993: 465
(in part, specimens from
Indonesia
=
P. salai
Cabezas, Macpherson & Machordom, 2009
).
Material examined.
New Caledonia
. MUSORSTOM 4.
Stn
170,
18°57.00’S
,
163°12.60’E
,
17 September
1985
, 485 m: 1 M
10.4 mm
, 4 ov. F
8.3–11.2 mm
. HALIPRO 1.
Stn CP
877,
23°03.51'S
,
166°59.20'E
,
31 March 1994
, 464–
480 m
: 1 M
8.7 mm
, 3 ov. F 9.8–11.0 mm. NORFOLK 1.
Stn DW
1694,
24°40'S
,
168°39'E
,
24 June 2001
, 575–
589 m
: 1 ov. F
8.6 mm
.
Vanuatu
. MUSORSTOM 8.
Stn CP
974,
19°21.51'S
,
169°28.26'E
,
22 September 1994
, 492–
520 m
: 5 M
Solomon Islands
. SALOMON 1.
Stn CP
1831,
10°12.1'S
,
161°19.2'E
,
05 October 2001
, 135–
325 m
: 4 M
8.4–12.6 mm
, 2 ov. F
8.1–9.6 mm
, 2 F
9.4–10.5 mm
.
Tonga
Islands.
BORDAU 2
.
Stn CP
1510,
21°04.65’S
,
175°22.52’W
,
31 May 2000
, 461–
497 m
: 2 M
9.2– 12.7 mm
, 3 ov. F
10.9–12.1 mm
.
Diagnosis.
Rostrum spiniform, larger than supraocular spines, with thin dorsal carina; margin between rostral and supraocular spines straight or slightly concave. Spinules on gastric and hepatic regions forming groups arising from scale-like striae and with few short uniramous setae. Mesogastric region with row of 3 well-developed spines. Cardiac region with 3 well-developed spines. Few and short setae along anterior branch of cervical groove. Sternal plastron with some short striae on sternite 4, and few short striae on each side of sternites 5–7. Lateral margin of antennular segment 1 with distal slender portion about half as long as proximal inflated portion. Antennal peduncle with anterior prolongation of segment 1 spiniform; segment 2 slightly longer than broad with distomesial spine mucronated, clearly overreaching segment 3, distolateral spine nearly reaching end of segment 3; segment 3 1.5 times longer than broad. Base of P1 carpus without bundle of setae P2 propodus about 15 times as long as wide, and 1.5 times dactylus length.
Remarks.
Paramunida stichas
belongs to the group of species with the rostral spine longer than the supraocular spines, and with the distomesial spine of antennal segment 2 mucronated. The species is closely related to
P. proxima
from
Philippines
, off
Zamboanga
, Mindanao, north of the Admiralty Islands,
Indonesia
, Kei Islands,
Solomon Islands
, and
Vanuatu
. These species can be differentiated by the number of spines in the mesogastric region: a row of 3 well-developed spines in
P.stichas
and only 1 (rarely 2) well-developed spine in
P. proxima
.
The genetic divergences between
P.stichas
and
P. proxima
were 2.87% (16S rRNA) and 6.47% (ND1).
The high degree of intraspecific variability in the species
P. stichas
can lead to misidentification when only morphological characters are used. Therefore, a re-examination of the material from
Philippines
and
Japan
(
Macpherson 1993
) using a combining approach (morphological and molecular information) would be desirable in order to confirm their taxonomic identity.
Distribution.
Solomon Islands
,
Vanuatu
,
New Caledonia
,
Fiji
, Field Bank,
Wallis
Islands, Bayonnaise Bank, southwestern
Australia
,
Philippines
, and
Japan
between 135 and
591 m
.