Fenneralpheus chacei Felder & Manning, 1986

Anker, Arthur, 2011, Six new species and three new records of infaunal alpheid shrimps from the genera Leptalpheus Williams, 1965 and Fenneralpheus Felder & Manning, 1986 (Crustacea, Decapoda), Zootaxa 3041, pp. 1-38 : 28

Fenneralpheus chacei Felder & Manning, 1986

Figs. 20–22

Fenneralpheus chacei Felder & Manning 1986: 498 , figs. 1–3.

Material examined. 1 female (cl 8.5 mm), OUMNH.ZC. 2011-06-019, Panama, Caribbean coast, Bocas del Toro, Isla Colón, Boca del Drago, sand flat with large seagrass patches, yabby pump, 0.5–1 m, leg. A. Anker, J.A. Vera Caripe, J.A. Baeza, 16.11.2006 [fcn 06-589]; 1 female (cl 6.0 mm), MNHN-IU-2011-5236, Panama, Caribbean coast, Bocas del Toro, Isla Carenero, sand flat with seagrass, 0.5–1 m, leg. A. Anker, I. Marin, 0 2.05.2007 [fcn 07- 158].

Description. For full description and illustrations see Felder & Manning (1986); illustrations of the Panamanian material are provided in Figs. 20–22 .

Size. The two females from Bocas del Toro, at cl 6.0 and 8.5 mm, are somewhat smaller than the type specimens from Florida, at 9.2 and 12.8 mm ( Felder & Manning 1986).

Colour in life. Uniform pink or pale reddish, due to numerous red chromatophores forming broad but diffuse bands on the abdomen; antennular and antennal peduncles and tail fan with higher concentration of red chromatophores; chelipeds with red chromatophores on distal merus and carpus; chelae mostly hyaline-white; walking legs mostly colourless ( Fig. 20 ).

Type locality. USA, Florida (holotype: Fort Pierce Inlet; paratype: off Key West).

Distribution. Western Atlantic: Florida: Indian River lagoon and Florida Keys ( Felder & Manning 1986); Panama: Bocas del Toro (present study).

Ecology. The Bocas del Toro specimens were collected on shallow sand and seagrass flats, from burrows of unknown hosts.

Remarks. The Panamanian specimens of F. chacei , both females, correspond closely to the holotype female of this species from Florida, including the very characteristic oblique-transversely ridged teeth on the major cheliped fingers ( Fig. 21 E, F; Felder & Manning 1986, fig. 3b).

Figures

FIGURE 20. Fenneralpheus chacei Felder & Manning, 1986, female from Bocas del Toro, Caribbean coast of Panama (OUMNH. ZC. 2011 - 06 - 019): A, frontal region, dorsal view; B, same, lateral view; C, telson, dorsal view; D, ventromesial tooth on first article of antennular peduncle, lateral view; E, scaphocerite, dorsal view; F, minor cheliped, lateral view; G, same, chela, lateral view; H, same, detail of cutting edge of dactylus; I, second pereiopod, lateral view; J, third pereiopod, lateral view; K, uropod, dorsal view (setae omitted).

FIGURE 21. Fenneralpheus chacei Felder & Manning, 1986, female from Bocas del Toro, Caribbean coast of Panama (OUMNH. ZC. 2011 - 06 - 019): A, major cheliped, lateral view; B, same, mesial view; C, same, carpus and chela, lateral view; D, same, mesial view; E, major chela fingers closed, lateral view; F, same, fingers opened, lateral view; G, detail of teeth on cutting edge of pollex.

FIGURE 22. Fenneralpheus chacei Felder & Manning, 1986, female from Bocas del Toro, Caribbean coast of Panama (OUMNH. ZC. 2011 - 06 - 019): A, right lateral view; B. left lateral view; C, dorsal view.