Abstract
Enhydrosoma texana sp. nov. is described from the northern Gulf of Mexico. The new species is closely related to E. parapropinquum Gómez, 2003 from northwestern Mexico. Both species share several characters including an elongated cylindrical caudal ramus, an abexopodal seta of antennae, the structure of mouthpart appendages, seta formula of thoracic legs P1–P4, the shape of the P5 exopod in the female and the apophysis structure of P3 in males. However, the new species is distinguishable from E. parapropinquum by the shape of the rostrum, number of the antennular segments, the shape of the mandibular palp, the relative lengths of the thoracic legs, the shape of the apophysis of P3 in the male, setal number and length of the P5 exopod of the female, the length of the seta on P5 in the male and the relative lengths of the caudal ramus in both sexes. This is the deepest record of a species in the genus Enhydrosoma.
Highlights
Enhydrosoma Boeck, 1872 is one of the biggest genera in the family Cletodidae T
During a survey of the meiofauna of the northern Gulf of Mexico, a new species of Enhydrosoma was collected from a sediment sample
We provide a detailed description of the new species and discuss its relationship with the congeners
Summary
Enhydrosoma Boeck, 1872 is one of the biggest genera in the family Cletodidae T. Gee [1] partially reviewed the taxonomic characters of the genus Enhydrosoma in the Cletodidae. Enhydrosoma species have been moved to other genera or newly erected genera within Cletodidae on several occasions [1,2,3,4,5]. There are few reports of species in the genus Enhydrosoma from the Gulf of Mexico; only four species Gómez [8,9] described four species During a survey of the meiofauna of the northern Gulf of Mexico, a new species of Enhydrosoma was collected from a sediment sample. We provide a detailed description of the new species and discuss its relationship with the congeners.
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