Merhippolyte americana Holthuis, 1961,

Pachelle, Paulo P. G., Anker, Arthur, Mendes, Cecili B. & Bezerra, Luis E. A., 2016, Decapod crustaceans from the state of Ceará, northeastern Brazil: an updated checklist of marine and estuarine species, with 23 new records, Zootaxa 4131 (1), pp. 1-63: 12-16

publication ID

http://doi.org/10.11646/zootaxa.4131.1.1

publication LSID

lsid:zoobank.org:pub:48CA9FCC-8044-448D-8CA5-5CD5B403D884

persistent identifier

http://treatment.plazi.org/id/03B787CC-B262-9E7E-FF55-BA4C7711FD7C

treatment provided by

Plazi

scientific name

Merhippolyte americana Holthuis, 1961
status

 

Merhippolyte americana Holthuis, 1961 

( Figures 7View FIGURE 7, 8View FIGURE 8)

Merhippolyte americana Holthuis 1961: 1  , fig. 1.

Material examined. Brazil, Ceará: 1 male, 1 ov. female, MZUSP 31505, 222 km (120 nautical miles) off Fortaleza, Banco Canopus, 60–70 m, coll. J. Coltro, 20.xi. 2005.

Distribution. Western Atlantic: USA (North Carolina), Brazil (Ceará, São Paulo, Rio Grande do Sul), Argentina (Buenos Aires) ( Christoffersen 1998; present study).

Remarks. The present material from Ceará agrees well with the description of Merhippolyte americana  provided by Holthuis (1961), except for a few morphological details. For instance, in the Ceará specimens, the rostrum bears three dorsal teeth (vs. four in Holthuis’ material); the second pereiopod carpus has 12 joints (vs. 13- 14 in Holthuis’ material), whilst the ischium is articulated (vs. not articulated in Holthuis’ description); the third pereiopod merus bears only one spiniform seta (vs. two in Holthuis’s material); the appendix masculina on the second male pleopod is shorter than appendix interna (vs. slightly longer than appendix interna in Holthuis’ description); and finally, the distal margin of the telson is shorter, about the same length as the lateral pair of distal spiniform setae (vs. longer, at least twice the length of these spiniform setae in Holthuis’ material) (cf. Figs. 7View FIGURE 7 B, E, J, 8 A, E, F and Holthuis 1961: fig. 1 a, c, m, n, p). In addition, the third maxilliped bears one small spiniform seta on the distolateral margin of the antepenultimate article ( Fig. 7View FIGURE 7 G), which, however, may have been overlooked by Holthuis (1961). For the time being, these differences are considered to be part of intraspecific variation of the species; however a further, more detailed comparison (including COI gene) between the populations from Brazil and the eastern USA is highly desirable. To our knowledge, the present material represents the first record of M. americana  from northeastern Brazil.

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

COI

University of Coimbra Botany Department

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Hippolytidae

Genus

Merhippolyte

Loc

Merhippolyte americana Holthuis, 1961

Pachelle, Paulo P. G., Anker, Arthur, Mendes, Cecili B. & Bezerra, Luis E. A. 2016
2016
Loc

Merhippolyte americana

Holthuis 1961: 1
1961