摘要：Two field trips were made during 2017 to Cayo Arenas and Cayo Arcas, southern Gulf of Mexico. Direct and
indirect sampling methods focused on shell-less marine heterobranchs were carried out. As a result, 30 species of
sea slugs are reported for the first time from these 2 remote reefs off the Yucatán Peninsula. From these, 7 species
hold new distribution records for the Gulf of Mexico: Sclerodoris worki, Platydoris angustipes, Polycera odhneri,
Hexabranchus morsomus, Limenandra nodosa, Petalifera ramosa, and Hermaea cruciata. Hexabranchus morsomus is
a considerable west geographical range extension from the known distribution range, so far restricted to the Caribbean
Sea. Nine specimens were identified up to genus level: Cuthona sp., Haminoea sp., Petalifera sp. and Elysia sp. With
the present contribution, the sea slug richness in the Campeche Bank increases to 94 species.
关键词：Inventories; Biodiversity; Coral reefs; Opisthobranchs; Mollusks; Campeche Bank
其他关键词：Inventories;Biodiversity;Coral reefs;Opisthobranchs;Mollusks;Campeche Bank
