Stylodactylidae and Bathypalaemonellidae (Crustacea: Decapoda: Caridea) from the PANGLAO 2004 and 2005 expeditions to the Philippines, with description of a new species of Stylodactylus A. Milne - Edwards, 1881
Author
Cleva, Régis
text
Zootaxa
2008
1813
29
41
journal article
10.5281/zenodo.182835
67839419-f50b-4289-b6f5-90181ff366f6
1175-5326
182835
Parastylodactylus longidactylus
Cleva, 1990
a
(
Figs. 2A
,
3
D)
Parastylodactylus longidactylus
Cleva 1990a
: 125
, figs. 12d, 15a, b, 16 a–d.
Material examined.
Philippines
, Panglao I., stn. CP2343,
9°27.4’N
–
123°49.4’E
,
273–302 m
, sandy/muddy substrate,
23 May 2005
: 1 ovig. female CL
5.9 mm
.
MUSORSTOM 2, stn. 83,
13°55.2’N
–
120°30.5’E
, 320–
318 m
, 0
2 December 1980
: 1 ovig. female
5.5 mm
,
holotype
(MNHN-Na10871); 4 ovig. females 5.0–
6.5 mm
,
paratypes
(MNHN-Na 4333).
Japan
, R.V.
Yoko-maru
, stn. F300–3, East
China
Sea west of Okinawa I.,
26°33.8’N
–
127°49.7’E
,
302 m
, 25 October
1997
,
coll. T
.
Kosuge
:
1
female
4.5 mm
(CBM-ZC 5401).
Comparative material.
Parastylodactylus richeri
Cleva, 1990a
:
New Caledonia
:
BIOCAL, stn. 42,
23°45’S
–
167°12’E
,
380 m
,
30 August 1985
: 1 ovig. female
4.5 mm
,
holotype
(MNHN-Na10872);
1 male
4.5 mm
, 1 ovig. female 5.0 mm,
paratypes
(MNHN-Na 10873). – BATHUS 1, stn. CP 670,
20°54’S
–
165°53’E
,
394–397 m
,
14 March 1993
: 1 ovig. female
5 mm
(with
Bopyridae
) (MNHN-Na14631). – Stn. DW 687,
20°34’S
–
165°07’E
,
408–440 m
,
16 March 1993
:
1 male
3.0 mm (MNHN-Na 14645). – RFO, 22°33, 41’S–
166°25.74’E
,
300 m
,
12 September 1994
: 1 ovig. female
4.5 mm
,
1 female
3.5 mm
(MNHN-Na13221).
Vanuatu
, MUSORSTOM 8: stn. CP 980,
19°21’S
–
169°25’E
,
433–450 m
,
22 September 1994
: 1 ovig. female 5.0 mm (MNHN-Na 14468). – Stn. CP 1024,
17°48’S
–
168°38’E
,
335–370 m
,
28 September 1994
: 1 ovig. female
4.5 mm
(MNHN-Na 14470). – Stn. CP 1025,
17°49’S
–
168°39’E
,
385–410 m
,
28 September 1994
: 1 ovig. female 6.0 mm (MNHN-Na 14469). – Stn. CP 1137,
15°41’S
–
167°02’E
,
360–371 m
,
11 October 1994
: 1 ovig. female
5.5 mm
(MNHN-Na 13222).
Remarks.
Of the six described species of
Parastylodactylus
,
P. bimaxilllaris
(
Bate, 1888
)
,
P. tranterae
Cleva, 1990
,
P. semblatae
Cleva, 1990
,
P. moluccensis
Cleva, 1997
,
P. longidactylus
Cleva, 1990
, and
P. r i c h - eri
Cleva, 1990, only the last two,
P. longidactylus
,
from
Philippines
, and
P. richeri
, from
Indonesia
,
Vanuatu
and
New Caledonia
display long and slender dactyls on P3 to P5 (specially P3 and P4), these articles being shorter and stouter in the four other species.
Parastylodactylus longidactylus
can be distinguished from
P. richeri
by its slenderer P3–P5, with longer dactyls, those of P3 and P4 being devoid of accessory spinules. The propodus/dactylus ratio of the last three pairs of pereopods are: P3: 1.5–1.6; P4: 1.7–1.8; P5:
4.5–4.8 in
P longidactylus
versus P3: 1.8–3.1; P4: 2.2–3.6; P5:
5.2–7.8 in
P. richeri
(see
Cleva, 1990a
: 127, figs. 15c, 16 e– h;
Cleva, 1997
: 397, fig. 4 G–H).
Observation of the Panglao specimen, unfortunately damaged, combined with careful examination of the photo shows that: the long dactyls are devoid of accessory spinules; the propodus/dactylus ratio of P3 and P4 are respectively 1.5 and 1.5 (estimated from the photo); the propodus/dactylus ratio of P5 is 4.0 (measured on the specimen). The rostrum is 1.25 times longer than the carapace. It bears 25 dorsal spines (six on the carapace proper) and three ventral.
FIGURE 2.
A,
Parastylodactylus longidactylus
, ovigerous female 5.9 mm, PANGLAO 2005, stn. CP2343, anterior portion of cephalothorax, lateral view; B,
Bathypalaemonella
aff.
hayashii
, male 9.5 mm, PANGLAO 2005, stn. CP2362, anterior portion of cephalothorax, lateral view; C,
Bathypalaemonetes brevirostris
, ovigerous female 9.9 mm, PANG- LAO 2005, stn. CP2343, anterior portion of carapace, lateral view.
One of several specimens from
Japan
and East
China
Sea sent by T. Komai appears to belong to
P. longidactylus
, never recorded before from this area.
Colouration.
Body pinkish, with some reddish patches. Rostrum translucent with apex pinkish. Pereopods pale pinkish, with some pale reddish stripes; part of ischio-merus of P3 and P4 red.
Distribution.
Philippines
,
273–320 m
;
Japan
,
302 m
.
First record for
Japan
.
The PANGLAO specimen represent the second record for the
Philippines
.