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
10.11646/zootaxa.5146.1.1
3b24340c-ddcb-45bc-a12b-a3f21832e794
11755334
7626155
52C3E5E3-80B6-49DB-BC9C-194560D491F7
Microcassiope minor
(
Dana, 1852
)
(
Figs. 37A–F
,
38A–E
,
39A–C
)
Xantho minor
Dana, 1852a: 169
[
Type
locality: “
Probably
Madeira
”; possibly the
Cape
Verdes
, v. original description].
Trindade specimens.
1 female
(
MZUSP 41070
),
Brazil
, off
Espírito Santo
,
Trindade Island
,
Ponta da Calheta
,
20º30’18.72”S
,
29º18’31.6”W
,
J.B. Mendonça
coll.,
25.vii.2018
,
15.6 m
.
1 male
(
MZUSP 40847
),
1 female
(
MZUSP 41292
),
ibidem
,
Praia do Noroeste
,
20º29’46.4”S
,
29º20’35.4”W
,
J.B. Mendonça
coll.
30.vii.2018
,
9 m
. 1 female (
MZUSP 40845
),
ibidem
,
28.xi.2017
,
9.4 m
.
2 males
,
4 females
(
2 juveniles
) (
MZUSP 40323
),
ibidem
,
20º29’48.14”S
,
29º20’35.21”W
,
J.B. Mendonça
coll.,
13.ii.2019
,
4 m
.
1 male
,
2 females
(
MZUSP 41294
),
ibidem
,
Enseada da Cachoeira
,
Farrilhões
,
20º31’22.4”S
,
29º19’52.0”W
,
J. M. Mendonça
coll.,
9.vii.2013
,
10.4 m
.
1 male
(
MZUSP 41295
),
ibidem
,
4.iv.2014
,
12.2 m
.
1 male
(
MZUSP 41296
),
ibidem
,
20º29’52.3”S
,
29º19’15.6”W
,
J. M. Mendonça
coll.,
17.iv.2014
,
13.3 m
.
1 ovigerous female (
MZUSP 40935
),
ibidem
,
20º31’29.8”S
,
29º19’52.0”W
,
J. M. Mendonça
coll.,
21.xi.2017
,
11.3 m
.
1 male
,
1 female
(
MZUSP 41297
)
,
1 female
(
MZUSP 41300
),
ibidem
,
Praia da Calheta
,
20º30’29.5”S
,
29º18’37.0”W
,
J.B. Mendonça
coll.,
20.vi.2016
,
8.2 m
.
4 males
,
4 females
(
MZUSP 41092
),
ibidem
,
20º30’18.72”S
,
29º18’31.67”W
,
J.B. Mendonça
coll.,
26.x.2014
,
9.9 m
.
1 male
(
MZUSP 41081
),
ibidem
,
Enseada Praia
do Príncipe, Ilha
Sul
,
20º31’34.32”S
,
29º19’27.98”W
,
J.B. Mendonça
coll.,
6.xi. 2014
,
17.6 m
.
1 male
(
MZUSP 33734
),
ibidem
,
Enseada
das
Orelhas
,
20º29’40.2”S
,
29º20’32.9”W
,
J.B. Mendonça
coll.,
18.iv.2014
,
12.1 m
.
1 female
(
MZUSP 33829
),
ibidem
,
1.xi.2014
,
12 m
.
1 ovigerous female (
MZUSP 33820
),
ibidem
,
21.vii.2015
,
15 m
.
1 male (
MZUSP 40842
),
ibidem
,
6.xii.2017
,
8.4 m
.
1 female
(
MZUSP 33728
),
ibidem
,
Enseada dos Portugueses
,
Farol
,
20º29’52.3”S
,
29º19’15.6”W
,
J.B. Mendonça
coll.,
20.v.2014
,
13.1 m
.
1 male
(
MZUSP 33819
),
ibidem
,
4.viii.2015
,
10 m
.
1 female (
MZUSP 40937
),
ibidem
,
4.xii.2017
,
12.7 m
.
2 males
(
MZUSP 41032
),
ibidem
,
Ponta do Monumento
,
20º30’10.3”S
,
29º20’36.1”W
,
J.B. Mendonça
coll.,
30.vi.2013
,
19.5 m
.
Size of largest male: cl
6 mm
, cw
8.9 mm
; largest female: cl
8.1 mm
, cw
11.1 mm
.
Comparative material examined.
Microcassiope minor
:
East Atlantic
:
Gulf
of Guinea,
4 males
,
2 females
(
USNM 170123
), southwest of Annobon,
01º28’S
,
05º36’E
, R/V “Pittsbury”, stn 282,
21.v.1965
,
23 m
.
Central Atlantic
:
1 male
(
USNM 256635
), Ascension Island,
English
Bay
,
Rocky Spit, R.B
. Manning coll.,
22.v.1971
, intertidal pool and rocky shore, some coarse sand bottom [
R
.
B. Manning
det.].
1 male
(
USNM 112506
), St. Helena Island, Ruperts
Bay
,
15º55’S
,
05º43’W
,
A. Loveridge
coll.,
18.iii.1960
[
R
.
B. Manning
det.]
.
Distribution.
Amphi-Atlantic. Western Atlantic:
Bahamas
, Gulf of Mexico,
Cuba
,
Curaçao
, and
Venezuela
(
Felder
et al.
2009
). This is the first record of
M. minor
from
Brazil
(Trindade Island). Central Atlantic:
Ascension
(
Manning & Chace 1990
) and
Saint Helena
(
Chace 1966
). Eastern Atlantic: from the eastern Mediterranean, Azores, Canary Islands, Madeira,
Cape Verde
, and Gulf of
Guinea
(
Manning & Holthuis 1981
, and references therein).
Ecological notes.
Shallow waters, usually from shore under stones to depths of
45 m
(
Manning & Holthuis 1981
), occasionally
220 m
(
Türkay1976
). Ovigerous females were recorded from
Saint Helena
in January and April (
Chace 1966
).
Microcassiope minor
is very common in Trindade where it was commonly associated with calcareous algae, between 4 and
19.5 m
. Its first zoeae stage was decribed by
Clark
et al.
(2004)
. The variable color pattern is illustrated in
Fig. 37A–E
.
FIGURE 37.
A–F,
Microcassiope minor
(
Dana, 1852
)
. A, B, Female, cl 5.3 mm, cw 7.6 mm (MZUSP 40937). C, Ovigerous female, cl 5.9 mm, cw 8 mm (MZUSP 33820). D, Female, cl 4.9 mm, cw 6.9 mm (MZUSP 33728). E, Male, cl 4.5 mm, cw 6.1 mm (MZUSP 33819). F, Male (USNM 256635). Habitus, dorsal (A, C–E) and ventral (B) aspects. F, Carapace dorsal view (cropped electronically). Photographs (A, E) by A. Pol.
Remarks.
The taxonomy of
Xantho minor
Dana, 1852
was stabilized by
Monod (1956)
, who clarified that
X. minor
(currently
Microcassiope minor
) is conspecific with
Xanthodes rufopunctatus
A.
Milne-Edwards, 1869
(
type
species of
Microcassiope
Guinot, 1967
), and also by
Chace (1966)
who showed that the western Atlantic
Pilumnus granulimanus
Stimpson, 1871a
, is a more recent synonym of
M. minor
.
Guinot (1971: 1076) removed
M. granulimana
(Stimpson)
from the synonym of
M. minor
(Dana)
while providing no reasons to support her judgement.
Manning & Holthuis (1981)
reduced again
M. granulimana
into a junior synonymy of
M. minor
.
The general aspect of the carapace and first male gonopod of the Trindade specimens agree well with the Ascension and eastern Atlantic specimens (Figs. 37A–F, 38A–E, 39–C).