Anamixis cavatura Thomas, 1997

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

Anamixis cavatura Thomas, 1997

Figs 10 , 23 A, B

Leucothoides pottsi : Shoemaker 1933: 249–250, fig. 3; Ledoyer 1967: 127, fig. 5 b; Ruffo 1969: 12–13; Sivaprakasam 1967 (1969): 373, fig. 1 e – g; Ledoyer 1978 a: 375; Ledoyer 1978 b: 300 –301; Ledoyer 1979 a: 169; Ledoyer 1979 b: 111, fig. 68 (II); Thomas 1979: 107–109; Barnard 1979: 130.

Anamixis pottsi : Ortiz and Lemaitre 1994: 124.

Anamixis hanseni : Pearse 1912: 370; Thomas 1979: 107–109; Thomas and Taylor 1981: 462–467, figs 1–5; Thomas and Barnard 1983: 154–157 [not A. hanseni Stebbing, 1897 ].

Anamixis cavatura Thomas, 1997: 47–50, figs 3, 4; LeCroy 2007: 506, fig. 447; White 2011: 25, fig. 1.

Material examined.

Panama • 1.7–4.9 mm • 2 anamorph ♂; Bocas del Toro, Cayo Solarte ; 9.3336°N, 82.2189°W; depth 2 m; among red algae and Halimeda ; 07 Aug 2005; R. Collin, M. Faust, E. Gaiser, S. LeCroy, S. Richardson, M. Sorenson leg.; GCRL 6678 • 1 leucomorph ♀; Bocas del Toro, mangrove island next to Isla Solarte ; depth 2 m; among coral rubble; 08 Aug 2021; K. N. White leg.; USNM 1762922 • 1 leucomorph ♀; Bocas del Toro, Drago Beach ; 9.4181°N, 82.3375°W; depth 2–3 m; among red algae; 09 Aug 2021; K. N. White leg.; USNM 1762923 • 1 leucomorph ♀; Bocas del Toro, San Cristobal ; 9.2625°N, 82.2350°W; depth 15 m; among coral rubble; 10 Aug 2021; K. N. White leg.; USNM 1762924 • 1 leucomorph ♂, 2 leucomorph ♀; Bocas del Toro, Crawl Caye ; 9.2376°N, 82.1438°W; depth 1.5–3 m; among Halimeda ; 11 Aug 2021; K. N. White leg.; USNM 1762925 • 1 anamorph ♂, 1 leucomorph ♂, 16 leucomorph ♀; Bocas del Toro, Crawl Caye ; 9.2475°N, 82.1290°W; depth 5 m; among coral rubble; 12 Aug 2021; K. N. White leg.; USNM 1762926 • 1 anamorph ♂; Bocas del Toro, Hospital Point , 9.3319°N, 82.2148°W; depth 1–3 m; among Halimeda ; 22 June 2023; K. N. White leg.; USNM 1762927 • 2 anamorph ♂; Bocas del Toro, Crawl Caye ; 9.2459°N, 82.1369°W; depth 1–4 m; among coral rubble and Halimeda ; 25 June 2023; K. N. White leg.; USNM 1762928 • 1 anamorph ♂; Bocas del Toro, Cayo Zapatilla 1; 9.2699°N, 82.0587°W; depth 10–11 m; among coral rubble; 28 June 2023; K. N. White leg.; USNM 1762929 .

Diagnosis.

Anamorph male. Head anterior margin with small tooth-like projection; ventral keel elongate, subtriangular with pointed tip. Gnathopod 2 basis anteromedial margin with acute projection; propodus palm with several teeth; dactylus with distal serrations.

Leucomorph male and female. Head anterior margin quadrate; ventral keel subrectangular. Gnathopod 1 carpus finely serrate, apex with two serrate spines, larger spine with bifid tip. Gnathopod 2 palm transverse, irregularly serrate.

Distribution.

USA: Dry Tortugas, Florida ( Shoemaker 1933), Fort Pierce to Tampa, including the Florida Keys ( Thomas 1997; LeCroy 2007), Mississippi Delta ( Pearse 1912); Colombia: Isla Barú ( Ortiz and Lemaitre 1994); Bahamas; Mexico: Yucatan; Belize: Carrie Bow Caye; Cuba: Guanahacabibes ( Varela et al. 2003); Venezuela ( Martín et al. 2013); Honduras; Jamaica; Greater and Lesser Antilles ( Thomas 1997); Panama: Bocas del Toro ( White 2011; present study).

Ecology and remarks.

This species occurs among red algae, Halimeda , and coral rubble at depths of 1– 11 m. Panamanian anamorph males differ from the original description in having the gnathopod 2 basis and ischium bare (vs each with one seta) and dactylus distally serrate (vs entire margin serrate). Living anamorphs are translucent white with brown splotches and have a red eye. Living leucomorphs are translucent white with magenta stripes.

Figures

Figure 10. Anamixis cavatura, leucomorph female (l), 3 mm, gnathopod 1 medial, gnathopod 2 medial, head; anamorph male (a), 3.1 mm, head, gnathopod 1 medial, gnathopod 2 medial; Scale bars: 0.5 mm.

Figure 23. Photographs of live specimens unless noted. A. Anamixis cavatura anamorph; B. Anamixis cavatura leucomorph; C. Anamixis vanga anamorph (ethanol-preserved specimen); D. Anamixis vanga leucomorph; E. Leucothoe alata (ethanol-preserved specimen); F. Leucothoe ashleyae; G. Leucothoe barana; H. Leucothoe flammosa. Scale bars: 1.0 mm.