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

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Merhippolyte americana Holthuis, 1961


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.


Museu de Zoologia da Universidade de Sao Paulo


University of Coimbra Botany Department














Merhippolyte americana Holthuis, 1961

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

Merhippolyte americana

Holthuis 1961: 1