Excorallana berbicensis Boone, 1918

Material Examined: CNCR­20401; number of specimens: 1, 1; PR station; collection date: 28/11/98.

Type locality: Guyana, South America.

Distribution: This species occurs in Guyana, French Guiana, Guadeloupe (Kensley & Schotte, 1989); Brazil (Thatcher, 1995) and the Gulf of California (Delaney, 1984).

Range extension: This is the first record for the Gulf of Mexico at PR inlet, Términos Lagoon, Campeche State, Mexico.

Remarks: Members of the genus Excorallana are known to be parasites on fishes, including sharks and rays (Delaney, 1984). There are 25 species included in the genus Excorallana (Kensley & Schotte, 2000) . Of these, eight species have been reported in the Gulf of Mexico (Cantú­Díaz & Escobar­Briones, 1992). However, this is the first record of E. berbicensis in this region.

The salinity and temperature range measured at the collection site were 25 to 27 %o and 25 to 26 °C, respectively.