Arenopontia? gussoae Cottarelli, 1973a sensu Mielke (1982b)

Sak, Serdar, Karaytuğ, Süphan & Huys, Rony, 2024, Review of Neoleptastacus Nicholls, 1945 (Harpacticoida, Arenopontiidae), including an updated key to species and proposal of Phreatipontia gen. nov., Zootaxa 5525 (1), pp. 1-66 : 45

Arenopontia? gussoae Cottarelli, 1973a sensu Mielke (1982b) [partim]

Original description. Mielke (1982b: 203; Figs 6B ; 7E ) [Playa Nueva Gorgona]. Mielke (1982b: 204) [Playa Avenida Balboa].

Body length. 360 μm (♀), 300 μm (♂) [Playa Nueva Gorgona material]; 360 μm (♀) [Playa Avenida Balboa material] ( Mielke 1982b).

Remarks. In addition to the material from Isla Melones (here treated as N. abbreviatus sp. nov. —see above), Mielke (1982b) also reported “ Arenopontia? gussoae ” from two other localities along the Pacific seaboard of Panamá. Compared to N. abbreviatus sp. nov., the specimens (3 ♀♀, 4 ♂♂) from Playa Nueva Gorgona ( PNG) display a number of differences: (1) rostrum not tapered to the same extent, (2) P4 exp-2 relatively stouter and exp-3 shorter, (3) inner spinous process of P5 with weak contours, (4) paired lateral spinous processes on anal somite pointed, and (5) caudal rami more square than rectangular. A single female from Playa Avenida Balboa agreed with the PNG material in the morphology of the rostrum, P5 and caudal rami but exhibited a P4 exp-3 that is stouter. It is unlikely that either population belongs to N. abbreviatus sp. nov. Pending the arrival of new morphological data based on a larger set of specimens both remain as taxa of uncertain status.

Martínez Arbizu & Moura (1994) reported A.? gussoae from Isla Margarita in Venezuela (Nueva Esparta State) and from Lima (Playa S. Bartolo) in Peru but did not make any morphological comparisons.

Figures

FIGURE 6. Neoleptastacus emendatus sp. nov. (♀): (A) habitus, dorsal; (B) habitus, lateral; (C) anal somite and caudal rami, dorsal; (D) anal somite and right caudal ramus, lateral.

FIGURE 7. Neoleptastacus emendatus sp. nov. (♀): (A) urosome, ventral; (B) antennule, dorsal; (C) antenna, outer; (D) antennary endopod, medial; (E) rostrum, dorsal; (F) midventral hook-like processes [indicated by arrows] on pedigerous somites; (G) hook-like process, lateral. [lateral endopodal spines indicated by arrows in C–D]