Abstract
A new species of a free-living marine nematode found in Brazil is described: Trileptium ribeirensis sp. nov. The type material is deposited in the Nematoda collection of the Museu de Historia Natural da Bahia, located at the Universidade Federal da Bahia. Trileptium includes eleven valid species of nematodes that have teeth and jaws positioned forward. The species was collected with the help of corers (3.5 cm in diameter and 30 cm long) on a sandy beach in Bahia. This species is distinguished from its congeners based on a combination of characters of the male (cuticle, buccal cavity, supplement and gubernaculum). An updated taxonomic key to the genus is presented.
Highlights
Enoplida are aquatic free-living nematodes, most of which occur in marine environments. Lorenzen (1994) considered this order as monophyletic in view of the presence of metanemes
Ribeira beach is located on the Itapagipe Peninsula (12°55’S, 38°30’W), east coast of Todos os Santos Bay (TSb), west coast of Salvador, state of Bahia, Brazilian northeast (Fig. 1)
The species’ name honors the site where the animals were collected. This is the first description of a new species of Nematode for Ribeira Beach, Salvador, Bahia, Brazil
Summary
Ribeira beach is located on the Itapagipe Peninsula (12°55’S, 38°30’W), east coast of Todos os Santos Bay (TSb), west coast of Salvador, state of Bahia, Brazilian northeast (Fig. 1). Holotype (male): Brazil, Bahia: Salvador (Ribeira Beach, 12°55’S, 38°30’W), 10-20 cm depth, collected with a corer, middle region, coarse sand, 45 μm sieve), 11.II.2009, Alves, O.F.S. et al leg., Museu de História Natural da Bahia, Brazil (UFBA NEM01063). Paratypes: Brazil, Bahia: Salvador (Ribeira Beach, 12°55’S, 38°30’W, 0-30 cm depth, collected with a corer, middle region, medium sand, 45 and 500 μm sieves), 9 males and 4 females, 11.II.2009; Alves, O.F.S. et al leg., Museu de História Natural da Bahia, Brazil (UFBA NEM00509, UFBA NEM00963, UFBA NEM01036, UFBA NEM01055, UFBA NEM01166, UFBA NEM01171, UFBA NEM01217, UFBA NEM01224, UFBA NEM01351, UFBA NEM01357, UFBA NEM01358, UFBA NEM01366, UFBA NEM01388). Nov.: anterior region showing setae (2), cephalic ring and amphid (3), orthometaneme (4) and teeth and jaws (5); posterior region with emphasis on the supplement (6) and the spicules and gubernaculum (7). This is the first description of a new species of Nematode for Ribeira Beach, Salvador, Bahia, Brazil
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