Taxonomy of deep-sea shrimps of the Superfamily Oplophoroidea Dana 1852 (Decapoda: Caridea) from Southwestern Atlantic
Author
Alves-Júnior, Flavio De Almeida
Author
Silva, Elinai Dos Santos
Author
Araújo, Marina De Sá Leitão Câmara De
Author
Cardoso, Irene
Author
Bertrand, Arnaud
Author
Souza-Filho, Jesser F.
text
Zootaxa
2019
2019-06-06
4613
3
401
442
journal article
26580
10.11646/zootaxa.4613.3.1
d8341546-2e59-43e5-b4b3-5bae0dfe6462
1175-5326
3239769
99A88354-3C2D-4D5A-A1DB-658CAE100F4A
Oplophorus gracilirostris
A.
Milne-Edwards, 1881
(
Fig. 31
A–B,
32
,
40
F)
Oplophorus longirostris
Spence Bate, 1888
: 765
, pl. 127, fig. 2.
Hoplophorus smithii
Wood-Mason & Alcock, 1891
: 194
.
Oplophorus gracilirostris
A.
Milne-Edwards, 1881
: 6
.—
de Man 1920
: 48
.—
Chace 1947
: 44
, figs 4–7; 1986: 59, fig. 32a–e. —
Vereshchaka 1990
: 140
.—
Poupin 1998
: 9
.—
Ramos-Porto
et al
. 2000
: 77
.—
Cardoso & Young 2005
: 52
, figs. 39–43.
Material examined
. 1 F,
Rio
Grande do
Norte
,
Potiguar Basin
MT# 64-2
,
Bottom
trawl, m
416 m
,
04° 36,24’ S
/
036° 45,73’ W
;
04° 36,52’ S
/
036° 44,58’ W
,
12 May 2011
,
MOUFPE
:
15.673. 2 M and 1 F,
Rocas Atoll
,
Abracos
1 ST# 14/ leg. 1,
Midwater
tow,
510 m
,
03°58,97’ S
/
034°03,37’ W
, 0
6 October 2015
,
MOUFPE
:
15.663. 1 F,
Rocas Atoll
,
Abracos
1 ST# 22/
Leg.
1,
Midwater
tow,
57 m
,
04°07,72’ S
/
033°47,45’ W
, 0
8 October 2015
,
MOUFPE
: 15.595. 1 F,
Rio
Grande do
Norte
,
Abracos
1 ST# 25/
Leg.
1,
Midwater
tow,
75 m
05°48,14’ S
/
034°57,11’ W
,
11 October 2015
,
MOUFPE
: 15.576. 3 M and 2 F,
Paraiba
,
Abracos
1 ST# 28/
Leg.
1,
Midwater
tow,
57 m
06° 37,30’ S
/
034° 45,53’ W
,
13 October 2015
,
MOUFPE
: 15.668. 1 M,
Pernambuco
,
Abracos
1 ST# 51/
Leg.
2,
Midwater
tow,
570 m
,
08° 56,49’ S
/
034° 29,05’ W
,
19 October 2015
,
MOUFPE
: 15.591.
Diagnosis
: Carapace with rostrum overreaching scaphocerite, ventral margin with six teeth; antennal spine present; branchiostegal spine present, without distinct carina; with sharp tooth near posterior end of ventral margin; with posterior extensions of upper lateral rostral carina subparallel in dorsal aspect. Scaphocerite with 14 teeth on outer margin, without barb near apex of inner margin. Abdomen not dorsally carinate on somite 6; pleura of somite 1 with small tooth on ventral margin; somites 3–5 with posteromesial tooth, the one of somite 3 distinctly strong (modified by
Cardoso & Young 2005
).
Distribution
: Western Atlantic: Gulf of
Mexico
,
Bahamas
, off
Dominica
, Lesser Antilles, Caribbean Sea,
Brazil
(
Amapá
, Pará,
Ceará
,
Rio Grande do Norte
,
Rocas Atoll
,
Paraíba
,
Pernambuco
and
Bahia
). Indo-Pacific Oceans: southeastern Africa,
Indonesia
,
Philippines
, southern
Japan
,
Fiji Islands
, Hawaii,
French Polynesia
, Seamounts Sala y Gòmez, Nazca ridge (
Chace 1986
;
Kensley 1987
;
Vereshchaka 1990
;
Cardoso & Young 2005
) (
Fig. 32
).
Bathymetric distribution
:
100–2400 m
depth (
Chace 1986
;
Vereshchaka 1990
;
Ramos-Porto
et al
. 2000
), herein this species was collected between
57–570 m
, thus extending its bathymetric distribution from shallow waters.
Remarks
: The material examined agrees with the description and figures of
Chace (1947
;
1986
) and
Cardoso & Young (2005)
. Two species of
Oplophorus
are recorded from Brazilian waters:
O. gracilirostris
and
O. spinosus
(
Brullé, 1839
)
. These species differ from each other by (characters of
O. spinosus
in parentheses): carapace with a
posteroventral tooth (
vs
without a posteroventral tooth), scaphocerite without a barb on the distal inner margin (
vs
with a barb on the distal inner margin) and first abdominal somite with a ventral tooth (
vs
somite without ventral tooth or with reduced ventral tooth) (Cardoso & Young 2005). This species occurs in mesopelagic zones from In- dian, Pacific and Atlantic oceans (Chace 1986; Kensley 1987). From Brazilian waters, the species
O. gracilirostris
was recorded by Ramos-Porto
et al
. (2000) and Cardoso & Young (2005). This paper reports
O. gracilirostris
for the first time in an oceanic island (Rocas Atoll).