Pelagic amphipods (Crustacea: Amphipoda: Hyperiidea) in western Mexico. 7 Superfamily Platysceloidea. Family Oxycephalidae
Author
Gasca, Rebeca
0000-0002-9716-1964
El Colegio de la Frontera Sur, Unidad Chetumal, Av. del Centenario km 5.5, Chetumal, Quintana Roo, 77014, Mexico. rebegasca @ gmail. com; https: // orcid. org / 0000 - 0002 - 9716 - 1964 & Currently retired.
rebegasca@gmail.com
Author
Hendrickx, Michel E.
Laboratorio de Invertebrados Bentónicos, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, PO Box 811, Mazatlán, 82000 Sinaloa, Mexico.
text
Zootaxa
2022
2022-03-03
5105
2
219
236
journal article
20349
10.11646/zootaxa.5105.2.3
d9ad8d5b-dd70-4efe-8a01-76ea5babc6b8
1175-5326
6332529
2B46C765-C80B-437B-B8C2-95335D589E9F
Oxycephalus clausi
Bovallius, 1887
Oxycephalus clausi
Bovallius, 1887: 35‒36
;
Brusca, 1981: 12
(list), 33 (key), 44‒45, fig. 20a, 20e; Siegel Causey, 1982: 330 (key), 331;
Vinogradov
et al
., 1996: 504
, fig. 219;
Zeidler, 1999: 394
(key), 411‒416, figs. 1C, 12‒15; 2016: 73 (passim), 76 (key); García Madrigal, 2007: 157 (list);
Guillén Pozo, 2007: 18
(key), 98‒100, fig. 34;
Valencia & Giraldo, 2009: 268
(tab. 1); 2012: 1493 (tab. 1); Gasca, 2009: 89 (tab. 1);
Lavaniegos & Hereu, 2009: 142
(tab. 1), 146 (tab. 2), 152 (appendix);
Gasca
et al
., 2012: 126
(tab. 1), 127‒134 (passim), 132 (tab. 3), 133 (tab. 4), 134 (tab. 5), 135 (tab. 6);
Lavaniegos, 2014: 5
(tab. 1);
Valencia
et al
., 2013: 52
(tab. 1);
Violante-Huerta
et al
., 2021: 81
(tab. 1).
Oxycephalus erythraeus
Cecchini, 1929: 482‒483
, pl. 2.
Material examined
. 50M, 102F in 24 localities (
Fig. 2
).
TALUD
I. St. 6 (
23°15’54”N
,
107°31’12”W
),
December 12, 1989
, 1M, BO, from surface to
1550 m
(TD>
2000 m
) (ICML-EMU-12950).
TALUD III
. St. 3B (
22°36’36”N
,
106°35’54”W
),
August 17, 1991
, 1M, 4F, I-K from surface to
275 m
(TD,
1585 m
) (ICML-EMU-12951-A); St. 5 (
23°22’N
,
107°10’W
),
August 24, 1991
, 1F, I-K, from surface to
365 m
(TD,
698 m
) (ICML-EMU-12951-B); St. 6 (
23º17’54”N
,
107º30’18”W
),
August 18, 1991
, 1F, AD from surface to 996‒1148 (ICML-EMU-12951-C); St. 10B (
23°43’24”N
,
107°39’06”W
),
August 18, 1991
, 3F, I-K from surface to
630 m
(TD, ca.
900 m
) (ICML-EMU-12951-D); St. 19 (
25°12’00”N
,
109°07’00”W
),
August 20, 1991
, 2M, I-K, surface to
410 m
(TD,
920 m
) (ICML-EMU-12952-A); St. 19B (
25°18’24”N
,
109°18’36”W
),
August 20, 1991
, 1M, 4F, I-K from surface to
600 m
(TD,
1890 m
) (ICML-EMU-12952-B); St. 25A1 (
25°51’00”N
,
109°57’00”W
),
August 21, 1991
, 4M, 3F, I-K from surface to ca.
200 m
(TD,
1280-1360 m
) (ICML-EMU-12952-C); St. 25A2 (
25°50’54”N
,
109°56’54”W
),
August 21, 1991
, 1M, 4F, I-K from surface to
230 m
(TD, ca.
1200 m
) (ICML-EMU-12952-D).
TALUD IV
St. 7 (
22°00’22”N
,
106°49’18”W
),
August 23, 2000
, 4M, 11F,
MN
from surface to
500 m
(TD,
1970 m
) (ECOSUR-10559); St. 15 (
23°23’30”N
,
107°47’48”W
),
August 24, 2000
, 2M, 2F,
MN
from surface to
1500 m
(TD,
2350 m
) (ICML-EMU-12953-A); St. 22 (
24°17’20”N
,
108°50’30”W
),
August 26, 2000
, 5M, 3F,
MN
from surface to
1325 m
(TD, ca.
1800 m
) (ICML-EMU-12953-B); St. 25A2 (
25°50’54”N
,
109°56’54”W
),
August 21, 2000
, 3F, I-K from surface to
230 m
(TD, ND) (ICML-EMU- 12954-A); St. 36 (
25°51’59”N
,
110°11’00”W
),
August 27, 2000
, 1M, 1F,
MN
from surface to ca.
1300 m
(TD,
2100 m
) (ICML-EMU-12954-B)
.
TALUD
V
. St. 5 (
22°00’57”N
,
106°40’00”W
),
December 13, 2000
, 7M, 9F,
MN
from surface to ca.
1400 m
(TD>
1600 m
) (ICML-EMU-12955-A); St. 29 (
25°14’36”N
,
109°24’15”W
),
December 17, 2000
, 2F,
MN
from surface to
1290 m
(TD,
2040 m
) (ICML-EMU-12955-B)
.
TALUD
VI
. St. 7 (
22°21’39”N
,
107°01’42”W
),
March 14, 2001
, 19M, 40F,
MN
from surface to
1305 m
(TD,
2100 m
) (ICML-EMU-12956); St. 15 (
23°14’42”N
,
107°30’W
),
March 14, 2001
, 1M, 1F,
MN
, surface to
1300 m
(TD,
2390 m
) (ICML-EMU- 12957-A); St. 22 (
24°17’34”N
,
108°50’25”W
),
March 15, 2001
, 2M, 1F,
MN
from surface to
1410 m
(TD,
1760 m
) (ICML-EMU-12957-B); St. 29 (
25°16’24”N
,
109°24’54”W
),
March 16, 2001
, 1F,
MN
from surface to
1440 m
(TD,
2080 m
) (ICML-EMU-12957-C)
.
TALUD XI
. St. 6A (
16°58’00”N
,
100°57’00”W
),
June 7, 2007
, 1M, 1F,
MN
from surface to
1400 m
(TD,
1960 m
) (ICML-EMU-12958-A); St. 19B (
17°56’00”N
,
103°10’00”W
),
June 9, 2007
, 1M, 3F,
MN
from surface to
1490 m
(TD,
1750 m
) (ICML-EMU-12958-B)
.
TALUD XII
. St. 4 (
16°59’39”N
,
100°58’07”W
),
March 28, 2008
, 3F,
MN
from surface to
1200 m
(TD,
1995 m
) (ICML-EMU-12959); St. 15C (
17°27’51”N
,
102°10’43”W
),
March 31, 2008
, 1M, 4F,
MN
from surface to
1530 m
(TD,
1880 m
) (ICML-EMU- 12960-A); St. 28B (
18°56’00”N
,
104°59’57”W
),
April 2, 2008
, 1M, 1F,
MN
from surface to
1425 m
(TD,
2041 m
) (ICML-EMU-12960-B)
.
Distribution
. Circumtropical and in the Mediterranean Sea. In the eastern Pacific from California to
Costa Rica
,
Panama
,
Colombia
, and
Chile
(
Vinogradov
et al
. 1996
, García Madrigal 2007,
Valencia & Giraldo 2009
,
Valencia
et al
., 2013
,
Violante-Huerta
et al
. 2021
, this study).
Remarks
.
Oxycephalus clausi
is easily recognized for the presence of a medial tooth on the ventral margin of pleonites 1‒3, and by the shape of the anterodistal corner of the carpus gnathopods 1 and 2 which are produced in a sharp point.
Siegel-Causey (1982)
reported
Oxycephalus clausi
as common in the Gulf of
California
, where it was collected in the northern, central and southern Gulf. Our results indicated a similar pattern (
Fig. 2
). In the Mexican portion of the
California
Current, it has been reported as rare by
Lavaniegos & Hereu (2009)
and by
Lavaniegos (2014
; 7.5% of the samples). It inhabits predominantly in surface waters (
Zeidler 1999
).