Euryplax nitida Stimpson, 1859

CASTRO, PETER & NG, PETER K. L., 2010, Revision of the family Euryplacidae Stimpson, 1871 (Crustacea: Decapoda: Brachyura: Goneplacoidea), Zootaxa 2375 (1), pp. 1-130 : 47-49

publication ID

https://doi.org/ 10.11646/zootaxa.2375.1.1

persistent identifier

https://treatment.plazi.org/id/03F487A8-3972-4214-7D8C-FB79F6CDFE21

treatment provided by

Felipe

scientific name

Euryplax nitida Stimpson, 1859
status

 

Euryplax nitida Stimpson, 1859 View in CoL

( Figs. 16A–F View FIGURE 16 ; 17A–G View FIGURE 17 ; 18A, B View FIGURE 18 ; 20A–C View FIGURE 20 ; 39A, B View FIGURE 39 )

Euryplax nitidus Stimpson, 1859: 60 View in CoL [Florida Keys]. — Smith 1870: 162 [Florida, Gulf of Mexico].

Euryplax nitida Stimpson 1871: 150 View in CoL [Florida Keys]. — Rathbun 1918: 34 [in key], 34, fig. 11, pl. 7 [Florida, Puerto Rico]; 1933: 78, fig. 69 [ Puerto Rico]. — Boone 1927: 14 [ Cuba]. — Williams 1965: 202, fig. 185; 1984: 431 [in key], 432, fig. 343 [Atlantic coast of the U.S.]. — Guinot 1969b: 512 [discussion], figs. 39, 41, 47, 56, 57; 1971: 1080 [in list]; 1984: pl. 1, figs. F, G. — Felder 1973: 70 [in key], pl. 10, fig. 1 [in list] [Gulf of Mexico]. — Powers 1977: 113 [in list] [Gulf of Mexico]. — Camp 1998: 148 [in list]. — Karasawa & Kato 2003b: 130 [in list]. — McLaughlin et al. 2005: 257 [in list]. — Hernández-Ávila et al. 2007: 35, 40 [in list] [ Venezuela]. — Ng et al. 2008: 78 [in list]. — Coelho et al. 2008: 12 View Cited Treatment [in list] [ Brazil].

Type material. Lost; type locality: Florida, Florida Keys.

Neotype of Euryplax nitidus Stimpson, 1859 : male, 7.1 mm × 11.3 mm ( UF 15166 ; Figs. 16 View FIGURE 16 , 39A View FIGURE 39 ); type locality: Florida, Gulf of Mexico, west of St. Petersburg , 27.4815°N, 82.8872°W, 0–12 m. GoogleMaps

Material examined. Florida. Gulf of Mexico, west of St. Petersburg , 27.4815°N, 82.8872°W, Capetown dredge, 0–12 m, G. Paulay coll., 12.11.2007: male neotype (here designated), 7.1 mm × 11.3 mm ( UF 15166 ); male, 4.4 mm × 7.0 mm ( UF 15168 ) GoogleMaps .

Gulf of Mexico, Marco Beach, L. B. Holthuis coll., 12.09.1960: 2 males, 7.2 mm × 10.4 mm, 4.2 mm × 5.6 mm, 1 pre-adult female, 3.9 mm × 5.8 mm, 1 female, 4.2 mm × 6.6 mm ( RMNH D 15769) .

Off southern Florida, 25°17.32’N, 81°39.49’W, 13 m, Suncoaster , 10.12.1983: 1 female ( USNM 276579 View Materials ) GoogleMaps .

Colombia. Off Bahía Honda , stn. A15–39, 5– 6 m, 8.04.1939: 3 males, 6.2 mm × 9.6 mm, 6.3 mm × 9.5 mm, 7.5 mm × 11.3 mm, 2 ovigerous females, 6.0 mm × 8.8 mm, 6.4 mm × 9.8 mm ( LACM); 16–18 m, 8.04.1939: 12 males, 1 pre-adult female, 7 females, 7 ovigerous females ( LACM) .

SW of Cape de la Vela, stn. A1339, CN 106, 5– 7 m, 8.04.1939: 1 male, 6.4 mm × 10.2 mm ( LACM); 18– 24 m, 2 males, 2 pre-adult females, 3 ovigerous females ( LACM) .

Venezuela. North of Coche I., stn. A32–39, 35– 60 m, 8.04.1939: 1 female ( LACM) .

North of Margarita I., stn. A42–39, 21.04.1939: 1 female, 1 ovigerous female ( LACM) .

Cubagua I., stn. A28–39, 4 m, 15.04.1939: 1 pre-adult female ( LACM).

Trinidad. Gulf of Paria near San Fernando, 4.5 m, Shell Expedition , 02.05.1952: 1 male ( RMNH D 9764 View Materials ) .

Curaçao. Prof. Boeke coll., 26.05.1905: 1 ovigerous female, 10.3 mm × 16.2 mm ( RMNH D 2263 View Materials ) .

Brazil. Dertero (?), M. Muller leg.: 1 male, 13.9 mm × 23.2 mm, 1 male, 9.8 mm × 16.4 mm (MNHN- B8732) .

Santos, 20.04.1961, L. R. Tommasi leg.: 1 female ( RMNH D 18755) .

Unknown location, identified as “ Frevillea rosaea ”: 1 male, 28.3 mm × 16.9 mm (NHM 1850.32).

Diagnosis. Outer orbital angle typically reduced, acuminate ( Figs. 16A View FIGURE 16 ; 17A, B, E View FIGURE 17 ). Dorsal surface of cheliped merus with depression near anterior margin.

Remarks. Euryplax nitida , which is Western Atlantic in distribution, is very close to E. polita , a species that is restricted to the Tropical Eastern Pacific region. Both species may be distinguished from each other by the shape of the outer orbital angle: typically reduced and acuminate in E. nitida ( Figs. 16A View FIGURE 16 ; 17A, B, E View FIGURE 17 ; Guinot 1969b: fig. 41) but more expanded anteriorly and broader in E. polita ( Fig. 18C View FIGURE 18 ; Guinot 1969b: fig. 1). The shape of the anterolateral teeth varies in both species, varying from obtuse to slender. The dorsal surface of the cheliped merus of E. nitida has a depression near its anterior margin, which is absent in E. polita . In the male neotype (7.1 mm × 11.3 mm; UF 15166) a triangular, setose tooth is located at the proximal margin of the depression. The depression is referred to as a “deep pit” by Rathbun (1918: 34) and “fosette” by Guinot (1969b: 512). The eye peduncles are noticeably shorter in E. nitida ( Fig. 16A, C View FIGURE 16 ) than in E. polita ( Fig. 18C View FIGURE 18 ), and the suborbital border is nearly straight, with two small lobes in E. nitida ( Figs. 16C View FIGURE 16 ; 17E View FIGURE 17 ; 18A View FIGURE 18 ), but with two lobes folded ventrally in the largest individuals of E. polita .

Some of the characters given by Rathbun (1918: 34, 36) to differentiate between the two species (i.e. carapace anterolateral borders converging anteriorly and fingers with white tips in E. nitida ; anterolateral borders parallel and fingers with brown tips) do not agree with all the material examined. In fact, the anterolateral borders of the carapace are parallel in the specimens of E. nitida examined ( Figs. 16A View FIGURE 16 ; 17A, B View FIGURE 17 ) as well as in the photograph given by Rathbun (1918: pl. 7) but they converge in at least some specimens of E. polita ( Fig. 18C View FIGURE 18 ). The photograph of the holotype of E. polita given by Guinot (1969b: fig. 1) nevertheless shows straight anterolateral borders.

The type material of Stimpson’s species, as with most of his material (see Evans 1967; Deiss & Manning 1981; Manning 1993; Manning & Reed 2006) is almost certainly lost. In the interest of long-term nomenclatural stability, we hereby designate a male neotype for Euryplax nitidus Stimpson, 1859 (7.1 mm × 11.3 mm; UF 15166; Figs. 16 View FIGURE 16 ; 39A View FIGURE 39 ). It was collected in the Gulf of Mexico off St. Petersburg, Florida, approximately 358 km north of the Florida Keys, the type locality of Stimpson’s species.

Colour pattern. Irregular dark gray spots across tan to light yellow dorsal surface of carapace; irregular spots on chelipeds, dark purple blotch at the base of each finger, and banded ambulatory legs (male neotype, UF 15166) ( Fig. 39A View FIGURE 39 ). Spots were relatively smaller in a smaller male (UF 15168) ( Fig. 39B View FIGURE 39 ).

Distribution. Western Atlantic from North Carolina, Bermuda and Gulf of Mexico to southern Brazil ( Coelho et al. 2008). Depth: shallow subtidal to 90 m ( Powers 1977).

RMNH

National Museum of Natural History, Naturalis

LACM

Natural History Museum of Los Angeles County

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Euryplacidae

Genus

Euryplax

Loc

Euryplax nitida Stimpson, 1859

CASTRO, PETER & NG, PETER K. L. 2010
2010
Loc

Euryplax nitida

Ng, P. K. L. & Guinot, D. & Davie, P. 2008: 78
Coelho, P. A. & Almeida, A. O. & Bezerra, L. E. A. 2008: 12
Hernandez-Avila, I. & Gomez, A. & Lira, C. & Galindo, L. 2007: 35
McLaughlin, P. A. & Camp, D. K. & Angel, M. V. & Bousfield, E. L. & Brunel, P. & Brusca, R. C. & Cadien, D. & Cohen, A. C. & Conlan, K. & Eldredge, L. G. & Felder, D. L. & Goy, J. W. & Haney, T. & Hann, B. & Heard, R. W. & Hendrickx, E. A. & Hobbs, H. H. & Holsinger, J. R. & Kensley, B. & Laubitz, D. R. & LeCroy, S. E. & Lemaitre, R. & Maddocks, R. F. & Martin, J. W. & Nikkelsen, P. & Nelson, E. & Newman, W. A. & Overstreet, R. M. & Poly, W. J. & Price, W. W. & Reid, J. W. & Robertson, A. & Rogers, D. C. & Ross, A. & Schotte, M. & Schram, F. R. & Shih, C. - T. & Watling, L. & Wilson, G. D. F. & Turgeon, D. D. 2005: 257
Karasawa, H. & Kato, H. 2003: 130
Camp, D. K. 1998: 148
Powers, L. W. 1977: 113
Felder, D. L. 1973: 70
Guinot, D. 1969: 512
Williams, A. B. 1965: 202
Boone, L. 1927: 14
Rathbun, M. J. 1918: 34
Stimpson, W. 1871: 150
1871
Loc

Euryplax nitidus

Smith, S. I. 1870: 162
Stimpson, W. 1859: 60
1859
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