Synalpheus yano ( Ríos & Duffy, 2007 )

Anker, Arthur, Pachelle, Paulo P. G., Grave, Sammy De & Hultgren, Kristin M., 2012, 3598, Zootaxa 3598 (1), pp. 1-96 : 76-80

Synalpheus yano ( Ríos & Duffy, 2007)

( Fig. 50 )

Zuzalpheus yano Ríos & Duffy 2007: 69 , figs 31–34, pl. 5.

Synalpheus yano — Hernáez et al. 2010: 692, fig. 2; Hultgren et al. 2010: 234.

Not Synalpheus yano — Macdonald et al. 2009: 51, pl. 6A, B (= S. ul, see Hultgren & Duffy 2010: p. 3)

Material examined. Panama: 1 ov. female (with hemiarthrine parasite), RMNH D54858, Bocas del Toro , Isla Colón, Punta Caracol, 1–3 m, in Lissodendoryx colombiensis , coll. A. Anker et al. (shrimp taxonomy class), 08.08.2008 [fcn 08-230A*]; 1 female, OUMNH. ZC.2012-07-079, Bocas del Toro, Cayo Solarte, Hospital Point , 1–2 m, in various sponges, coll. A. Anker et al. (shrimp taxonomy class), 04.08.2008 [fcn 08-223*]; 1 female, MNHN-IU-2010-4160, Bocas del Toro , Cayo Solarte , Hospital Point , in sponge, coll. C. Hurt, 10.09.2006 [fcn 06- 467]; 3 males, 2 ov. females, MNHN-IU-2010-4161, Bocas del Toro , sponges, coll. A. Anker et al. (shrimp taxonomy class), 08.2008 [fcn 08-298, 08-299, 08-300, 08-301, 08-302]; ~ 50 specimens of both sexes, MNHN-IU- Colón , Punta Caracol , 1–3 m, in sponge ( Lissodendoryx colombiensis or another sponge), coll. A. Anker, J.A. Baeza, 28.04.2007 [fcn 07-150B*]; 1 male, 1 ov. female, RMNH D54859, same collection data [fcn 07-138B*]; 1 male, MNHN-IU-2010-4163, same collection data [fcn 07-148C]; 1 male, UP, Bocas del Toro , Cayo Solarte, Hospital Point, cryptic sponge in rubble, coll. C. Hurt, 10.09.2006 [fcn 06-466]; 1 ov. female, UP , Isla Grande, between main village and Playa de la Punta, cryptic sponge in coral rocks, 1–1.5 m, coll. A. Anker, 04.09.2006 [fcn 06-460*] . Mexico: 1 ov. female, OUMNH. ZC.2012-07-115, Gulf of Mexico, Arrecife Alacranes off Yucatan Peninsula , sta ALP20, 22.383420, -89.681530, sponge, coll. J. Duarte-Gutiérrez, 08.08.2009 [fcn JD-066C*] .

Material tentatively identified as Synalpheus yano (?): Panama: 1 male, OUMNH. ZC.2012-07-078, Bocas del

Description. For detailed description and illustrations see Ríos & Duffy (2007).

Size range. Males, 4.0– 6.3 mm cl; females, 3.5–6.1 mm cl.

Colour in life. Semitransparent to pale orange, diffusely covered with reddish chromatophores, sometimes more intense orange; ovaries and fresh eggs red-orange ( Fig. 50 ).

Type locality. Carrie Bow Cay , Belize .

Distribution. Western Atlantic: Gulf of Mexico: Alacranes Reef; Caribbean Sea: Belize [Carrie Bow Cay], Panama [Bocas del Toro, Isla Grande], Jamaica [Discovery Bay] ( Ríos & Duffy 2007; K. Hultgren, pers. obs.; present study; see map in Fig. 53).

Ecology. Subtidal reef habitats and adjacent area with abundance of rubble and sponges, sometimes close to mangroves or seagrass beds; known depth range: 1–3 m; obligate symbiont of demosponges Lissodendoryx cf. strongylata , L. colombiensis , Hymeniacidon caerulea and Calyx podatypa ( Ríos & Duffy 2007; present study); typically in heterosexual pairs.

Remarks. Within the S. longicarpus species complex, S. yano is characterised mainly by the squarish to broadly rounded orbital teeth and by the absence of a blade on the scaphocerite. However, in some Panamanian specimens, especially males, the orbital teeth appear to be slightly more triangular.

One specimen (OUMNH.ZC.2012-07-078) was tentatively identified as S. yano despite having four articles in the carpus of the second pereiopod. Using the key in Ríos & Duffy (2007), this specimen would key out to S. barahonensis Armstrong, 1949 , which, however, is different from S. yano in having a scaphocerite blade and single distolateral tooth on the uropodal exopod ( Armstrong 1949). In Bocas del Toro, Panama, S. yano is often parasitised by an abdominal parasitic isopod from the bopyrid subfamily Hemiarthrinae ( Hernáez et al. 2010) , which remains to be identified.

Figures

FIGURE 50. Synalpheus yano (Ríos & Duffy, 2007): a, b, male from Bocas del Toro, Panama (D54857) on black (a) and white