Apolochus cf. picadurus ( Barnard, 1962 )

Dugger, Abigail R. & White, Kristine N., 2025, Caribbean Amphipoda (Crustacea) of Panama. Part V: parvorder Amphilochidira, ZooKeys 1259, pp. 57-102 : 57-102

Apolochus cf. picadurus ( Barnard, 1962)

Figs 4 , 22 B

Amphilochus picadurus Barnard, 1962: 126–129, fig. 4.

Apolochus picadurus : Hoover and Bousfield 2001: 15.

Material examined.

Panama • 1–2 mm • 3 ♀; Bocas del Toro, Pigeon Key Reef ; 9.2693°N, 82.2489°W; depth 0.5–1 m; among Halimeda and Thalassia ; 9 Aug 2005; E. Baiser, T. A. Haney, S. LeCroy leg.; GCRL 6673 • 2 ♀; Bocas del Toro, Crawl Caye ; 9.2476°N, 82.1290°W; depth 5–8 m; among coral rubble; 26 June 2023; K. N. White leg.; USNM 1762915 .

Diagnosis.

Head anteroventral margin acute. Antenna 1 shorter than peduncle of antenna 2, lacking accessory flagellum. Gnathopod 2 carpal lobe nearly reaching palmar angle; propodus lacking anterolateral spines, with anterodistal projection. Pereopods 3 and 4 dactyli slender.

Distribution.

USA: Southern California ( Barnard 1962); Panama: Bocas del Toro (present study).

Ecology and remarks.

This species occurs among coral rubble, Halimeda , and Thalassia at depths of 0.5–8 m in Panama and among green mud and rock in Southern California at depths from 3.6–36 m ( Barnard 1962). Panamanian specimens agree closely with the original description. However, the mandibular molar was broken during dissection and cannot be confirmed in Panamanian specimens. The current distribution of this species is from central to Southern California ( Barnard 1962). This finding extends the range of this species to include the Caribbean Sea. Analysis of more specimens is needed to confirm the species. Color of living specimens is unknown, ethanol-preserved specimens retain a brown spotted pattern.

Figures

Figure 4. Apolochus cf. picadurus, female, 1.9 mm, gnathopod 2 lateral, pereopod 3, head, and antennae 1. Scale bars: 0.5 mm.

Figure 22. Photographs of living specimens unless noted. A. Apolochus dragensis sp. nov.; B. Apolochus pillaii; C. Apolochus cf. picadurus (ethanol-preserved specimen); D. Seba cf. tropica (ethanol-preserved specimen); E. Stenothoe gallensis; F. Stenothoe minuta; G. Stenothoe valida (ethanol-preserved specimen). Scale bars: 1.0 mm.