Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean
Author
TAVARES, MARCOS
0000-0002-7186-5787
Museu de Zoologia, Universidade de São Paulo. CEP 04263 - 000, São Paulo, SP, Brazil
mdst@usp.br
Author
MENDONÇA, JOEL BRAGA DE JR.
0000-0002-4593-8495
Museu de Zoologia, Universidade de São Paulo. CEP 04263 - 000, São Paulo, SP, Brazil
text
Zootaxa
2022
2022-06-02
5146
1
1
129
http://dx.doi.org/10.11646/zootaxa.5146.1.1
journal article
53704
10.11646/zootaxa.5146.1.1
3b24340c-ddcb-45bc-a12b-a3f21832e794
11755334
7626155
52C3E5E3-80B6-49DB-BC9C-194560D491F7
Portunus anceps
(
Saussure, 1857
)
(
Fig. 29A–F
)
Lupea anceps
Saussure, 1857: 502
[
Type
locality:
Cuba
].
Lupea anceps
Saussure, 1858: 434
(18) [see
Hollier, 2018
].
Trindade and Martin Vaz specimens.
1 male
(
MZUSP 33826
),
Brazil
, off
Espírito Santo
,
Trindade Island
,
Praia do Lixo
, 20°31’29.8’S, 29°19’43.9”W,
J.B. Mendonça
coll.,
25.x.2014
,
13.7 m
.
1 juvenile
(
MZUSP 40185
),
ibidem
,
J.B. Mendonça
coll.,
22.xi.2017
,
12.7 m
.
1 female
(
MZUSP 40178
),
ibidem
,
Ponta Norte
,
20°29’18.7”S
,
29°20’18.3”W
,
J.B. Mendonça
coll.,
27.xi.2017
,
10.7 m
.
1 male
(
MZUSP 40184
),
ibidem
,
Enseada
das
Orelhas
,
20°29’40.2”S
,
29°20’32.9”W
,
J.B. Mendonça
coll.,
27.xi.2017
,
10.3 m
.
2 juveniles
(
MZUSP 40181
),
ibidem
,
Enseada dos Portugueses, R
/V “Marion Dufresne”,
TAAF
MD55/Brésil
Expedition
coll.,
22.v.1987
, vacuum suction sampler,
10 m
. 3 juveniles (
MZUSP 41464
),
ibidem
, off
Trindade Island
, stn 36 DC61,
20°29’S
,
29°18’W
,
22.v.1987
,
63 m
. 1 juvenile (
MZUSP 40183
),
ibidem
,
Ponta da Calheta
,
20°30’18.72S
,
29°18’31.6”W
,
J.B. Mendonça
coll.,
24.xi.2017
,
17 m
. 1 juvenile (
MZUSP 41470
), R/V “Marion Dufresne”,
TAAF
MD55/Brésil
Expedition
,
Ponta
da Calheta
, stn 35 DC59,
20°30.37’S
,
29°18.55’W
,
22.v.1987
,
60 m
. 1 male (
MZUSP 40176
),
Martin Vaz Archipelago
,
20°28’42.74’’S
,
28°51’8.98’’W
,
J.B. Mendonça
coll.,
25.i.2019
,
10.6 m
.
Size of largest male: cl
8.9 mm
, cw
17 mm
; female: cl
10.6 mm
, cw
21.9 mm
.
Comparative material examined.
Portunus anceps
:
Central Atlantic
:
1 male
(
USNM 252328
),
Ascension Island
,
North
edge of
Southwest
Bay
,
McArthur Point
,
Turtle Shell Beach
, stn ASC-22,
R.B. Manning
coll.,
v.1971
.
Brazil
:
Par
:
1 female
(
USNM 15258
), off
Carutapera, R
/V “
Oregon
”, stn 4220,
00°01’N
,
45°48’W
, dredge,
54.8 m
.
Ceará
:
1 male
(
MZUSP 8940
), R/V “Almirante Saldanha”, stn DG 01,
3°32.5’S
,
38°39.5’W
,
19.vii.1987
.
São Paulo
:
1 female
(
MZUSP 13086
),
Ubatuba
,
v.1998
.
Distribution.
Bermuda
, North Carolina, Gulf of Mexico, Antilles to
Brazil
(
Amapá
to
Ceará
,
Pernambuco
to
Bahia
,
Rio de Janeiro
,
São Paulo
) (
Melo 1996
;
Felder
et al.
2009
;
Mantelatto
et al.
2020
). Brazilian oceanic islands: Fernando de Noronha and Rocas Atoll (
Coelho Filho 2006
;
Alves
et al.
2008
;
Alves
et al.
2017
), Trindade (
Serejo
et al.
2006
) and Martin Vaz (this study). Central Atlantic:
Ascension Island
(
Manning & Chace 1990
).
Ecological notes.
Portunus anceps
inhabits a variety of bottom
types
more commonly sand, shell, under rocks in sandy bottoms, rubble, macro- and calcareous algae, and rarely mud, between
1m
and
130 m
, occasionally
510 m
(
Coelho & Ramos 1972
;
Coelho & Ramos-Porto 1992
;
Melo 1996
;
Felder
et al.
2009
;
Alves
et al.
2017
).
Portunus anceps
has also been reported from pelagic
Sargassum
(see
Fine 1970
).
Manning & Chace (1990)
found
P. anceps
in protected tide pool with coarse sand bottom. In Trindade it has been found under rocks in sandy bottoms between 10 and
17 m
; the juvenile MZUSP 41470 was dredged at
60 m
. The mottled color pattern of the carapace dorsal surface enables the crabs to conceal themselves by matching the colors and patterns of the substrate, whereas the crab’s ventral surface is uniformly whitish (
Fig. 29A–F
).
Remarks.
Manning & Chace (1990)
reported that the
Ascension
specimens have larger carapace submedian frontal teeth when compared to specimens from elsewhere. The Trindade specimens differ from the male USNM 252328 from
Ascension
in that the carapace submedian frontal teeth are only slightly less advanced than the outer teeth (vs comparatively much less advanced in the
Ascension
specimen). The specimens from Trindade and
Ascension
otherwise agree well with each other. The shape of the carapace and the development of the submedian frontal teeth (more advanced in the younger stages) actually change considerably with the growth (
Fig. 29A, C–E
).