Synalpheus cf. pandionis Coutière, 1909

Almeida, Alexandre Oliveira De, Guerrazzi, Maria Cec Lia & Coelho, Petr Ȏ Nio Alves, 2007, Stomatopod and decapod crustaceans from Camamu Bay, state of Bahia, Brazil, Zootaxa 1553, pp. 1-45 : 15

publication ID

https://doi.org/10.5281/zenodo.178168

DOI

https://doi.org/10.5281/zenodo.6249165

persistent identifier

https://treatment.plazi.org/id/E218B402-FFFD-517A-FF73-FF19491CCDE7

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Plazi (2016-04-05 19:31:21, last updated 2024-11-26 11:05:03)

scientific name

Synalpheus cf. pandionis Coutière, 1909
status

 

Synalpheus cf. pandionis Coutière, 1909 View in CoL

( Figs. 3–4 View FIGURE 3 View FIGURE 4 )

Material examined (N=2). 1f, 24/III/2005, St. 0 4 ( MZUESC #661); 1f, 30/X/2004, St. 0 4 ( MZUESC #709).

Distribution. Western Atlantic – Florida, Gulf of Mexico, Puerto Rico, Virgin Islands, Barbados, Curaçao, off Panama, and Venezuela ( Chace 1972; Dardeau 1984). Brazil (Ceará) ( Coelho Filho 2006).

Ecological notes. Under rocks, in seagrass meadows, sponges, and dead and living coral. From shallow waters to 73 m ( Dardeau 1984).

Previous records in Bahia. None.

Remarks. Synalpheus pandionis is a western Atlantic species complex within the S. longicarpus (Herrick, 1891) clade (see Morrison et al. 2004).

Dardeau (1984) resurrected S. pandionis from the synonymy of S. longicarpus , originally proposed by Christoffersen (1979). The morphology of two females (MZUESC#661: 4.0 mm CL, not ovigerous; MZUESC#709: 4.7 mm CL, ovigerous) examined by us agrees well with the diagnosis of S. pandionis provided by Dardeau (1984). The orbital hoods and the rostrum are subequal in length; they are also rounded and broader than the rostrum; the space between the orbital teeth and the rostrum is U-shaped ( Figs. 3 View FIGURE 3 A, B). The antennal scaphocerite and basicerite are subequal in length ( Fig. 3 View FIGURE 3 A). The palm of the major chela bears a blunt dorsodistal tubercle, which is armed with a secondary, ventrally directed tooth ( Figs. 3 View FIGURE 3 H, I). The dactylus of the minor first chela is distally bidentate; the fixed finger is simple ( Fig. 4 View FIGURE 4 C). The pereiopods 2–5 are very similar to those illustrated by Dardeau (1984) ( Figs. 4 View FIGURE 4 D, E, G, I). The uropodal exopod is armed with 5 fixed teeth proximal to the movable spine ( Fig. 3 View FIGURE 3 F). The dactyli of pereiopods 3–5 are biunguiculate, with the tooth on the flexor margin being smaller and slightly divergent from the distal tooth ( Figs. 4 View FIGURE 4 F, H, J). The main difference between the two females examined by us lies in the rostrum length. A subtle variation was observed in the length of the rostrum relative to the orbital hoods length: in the ovigerous female (MZUESC#709), the rostrum is narrower at base (spine-like in dorsal view) and slightly longer than the orbital hoods ( Fig. 3 View FIGURE 3 B), whereas in the non-ovigerous female (MZUESC#661), the rostrum and orbital hoods are equal in length and the rostrum has a wider base (more triangular) ( Fig. 3 View FIGURE 3 A). The herein reported occurrence of S. cf. pandionis in Camamu Bay extends the southern range limit of this species complex.

Chace Jr., F. A. (1972) The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a summary of the West Indian shallow-water species (Crustacea: Decapoda: Natantia). Smithsonian Contributions to Zoology, 98, 1 - 179.

Christoffersen, M. L. (1979) Decapod Crustacea: Alpheoida. Campagne de la Calypso au large des cotes atlantiques de l'Amerique du Sud (1961 - 1962). I. 36, Annales de l'Institute Oceanographique, Monaco, (Suppl.), 55, 297 - 377.

Coelho Filho, P. A. (2006) Checklist of the Decapods (Crustacea) from the outer continental shelf and seamounts from Northeast of Brazil - REVIZEE Program (NE III). Zootaxa, 1184, 1 - 27.

Coutiere, H. (1909) The American species of the snapping shrimps of the genus Synalpheus. Proceedings of the United States National Museum, 36, 1 - 93.

Dardeau, M. R. (1984) Synalpheus shrimps (Crustacea: Decapoda: Alpheidae). The Gambarelloides group, with a description of a new species. Memoirs of the Hourglass Cruises, 7 (2), 1 - 125.

Morrison, C. L., Rios, R. & Duffy, J. E. (2004) Phylogenetic evidence for an ancient rapid radiation of Caribbean spongedwelling snapping shrimps (Synalpheus). Molecular Phylogenetics and Evolution, 30, 563 - 581.

Gallery Image

FIGURE 3. Synalpheus cf. pandionis Coutière, 1909, from Camamu Bay, Bahia, Brazil. A, D – F, H, I: non-ovigerous female (MZUESC # 661); B, C, G, ovigerous female (MZUESC # 709). A. anterior region of carapace and frontal appendages, dorsal view; B. anterior region of carapace, dorsal view; C. same, lateral view; D. abdomen and telson, lateral view; E. telson, dorsal view; F. uropod, left exopod, dorsal view; G. left major chela, lateral view; H. left major chela, lateral view of distal portion; I. same, mesial view; Figures A, C, E – G — setae omitted. Scale bars: A, C, D, H, I = 1 mm; B, E, F = 0.5 mm; G = 2 mm.

Gallery Image

FIGURE 4. Synalpheus cf. pandionis Coutière, 1909, ovigerous female (MZUESC # 709), from Camamu Bay, Bahia, Brazil. A. right minor chela, lateral view; B. same, dorsal view; C. same, detail of chela, mesial view. D. right pereiopod 2; E. right pereiopod 3; F. same, distal portion; G. right pereiopod 4; H. same, distal portion; I. right pereiopod 5; J. same, distal portion. Scale bars: A, B, D, E, G, I = 1 mm; C = 0.5 mm; F, H, J = 0.25 mm.

MZUESC

Museu de Zoologia da Universidade Estadual de Santa Cruz

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Alpheidae

Genus

Synalpheus