Crustacean Research
Online ISSN : 2189-5317
Print ISSN : 0287-3478
ISSN-L : 0287-3478
Original article
A new species and new host records of the genus Elthusa (Crustacea: Isopoda: Cymothoidae) from Japan
Nobuhiro Saito Takeo Yamauchi
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JOURNAL FREE ACCESS

2016 Volume 45 Pages 59-67

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Abstract

Elthusa moritakii sp. nov., a branchial parasite of the deepwater bullhead sculpin Ereunias grallator, is described from Japan. The new species is morphologically similar to Elthusa propinqua (Richardson, 1904), but can be distinguished from the congener by a combination of characteristics of ovigerous females, including pereopods 5–7 with unexpanded carina, number of robust setae on maxilla, greatest width of pleon, shape of pleopods, and length of pleotelson. Further, new host records of E. propinqua are here reported. This species was recently collected from five macrourid fish species from Japan, including the grenadiers, Coelorinchus jordani, C. longissimus, the spearnose grenadier, C. multispinulosus, the unicorn grenadier, C. productus, and the Sagami grenadier, Ventrifossa garmani.

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© 2016 The Carcinological Society of Japan
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