Brachiopods from off the San Bernardo Archipelago (Colombian Caribbean), with comments on specific synonymies in Tichosina Cooper, 1977 Author Rojas, Alexis Author Gracia, Adriana Author Patarroyo, Pedro text Zootaxa 2015 3914 1 55 63 journal article 36737 10.11646/zootaxa.3914.1.3 7418bedf-9a0a-40af-bdb3-8653e268b66a 1175-5326 287726 F3B758CA-3C6C-42EF-91D6-6ECD84449122 Tichosina plicata Cooper, 1977 ( Fig. 2 A–E) 1977 Tichosina bullisi Cooper , p. 66–67, pl. 6, figs 1–8. 1977 Tichosina dubia Cooper , p. 68–69, pl. 12, fig. 18; pl. 19, figs 2–7; pl. 21, figs 1–5. 1977 Tichosina plicata Cooper , p. 82–83, pl. 5, figs 9–15; pl. 21, figs 6–11. v2009 Tichosina sp. indet.—Rojas et al ., figs. 2a–c. Occurrence . Off the San Bernardo Archipelago, Colombian Caribbean: MARCORAL stations D3 (N 9° 48.88'; W 76° 12.47'), D12 (N 9° 47.10'; W 76° 13.28'), D28 (N 9° 46.64'; W 76° 13.86'). MACROFAUNA II stations E–155 ( 9° 47' 12" N ; 76° 13' 45" W ) and E–156 ( 9° 47' 0.9" N ; 76° 14' 12" W ) from Reyes et al . (2005) . Material . Two conjoined shells INV BRA 5, INV BRA 6. A total of 33 conjoined shells are available. Description . External characters: shell large (maximum observed length 36.2 mm ), rounded-pentagonal in outline, longer than wide, gently ventribiconvex, maximum width anterior to midlength; beak suberect, foramen moderate in size, labiate, permesothyrid; anterior commissure strongly uniplicate, lateral commissure nearly straight, folding develops in juvenile growth stages; numerous growth lines concentrated toward anterior and anterolateral margins. Internal characters: dorsal valve with cardinal process elliptical, outer hinge plates moderately long, wide, deeply concave; crural bases flat, elevated; crural processes flat, curved inward, bluntly pointed; loop short (<25% of dorsal valve length), wide (20% of dorsal valve width), transverse band wide, broad, slightly arched. Remarks . The available material is similar in both internal and external characteristics with those for the species T. plicata in Cooper (1977) , however, the Colombian specimens are slightly larger. The studied material is similar to Cooper’s illustrations (pl. 5, figs. 9–15; pl. 21, figs. 6–11). Tichosina plicata has been recorded in the southeastern Caribbean (e.g. Venezuela , Trinidad ) and the northeastern Atlantic coast of South America ( Logan 1990 ). Cooper (1977) erected seventeen species of the genus Tichosina from the modern Caribbean Sea. Two of the Cooper’s species, i.e. T. bullisi and T. dubia , show the same general characteristics as T. plicata , and therefore were synonymized. The material studied in the present study consisted of empty and complete (soft bodied) specimens.