Elthusa Schioedte & Meinert, 1884

Hadfield, Kerry A., Tuttle, Lillian J. & Smit, Nico J., 2017, Elthusawinstoni sp. n. (Isopoda, Cymothoidae), a new fish parasitic isopod from Hawaii, ZooKeys 661, pp. 125-135 : 125

publication ID

https://dx.doi.org/10.3897/zookeys.661.11251

publication LSID

lsid:zoobank.org:pub:5BD8A826-DA7D-4C70-A078-290ED7B600AA

DOI

https://doi.org/10.5281/zenodo.3508653

persistent identifier

https://treatment.plazi.org/id/147B692B-63AF-6532-F38A-B6C2636E4DFC

treatment provided by

ZooKeys by Pensoft

scientific name

Elthusa Schioedte & Meinert, 1884
status

 

Genus Elthusa Schioedte & Meinert, 1884 View in CoL

Elthusa Schioedte & Meinert, 1884: 337.- Bruce 1990: 254.- Trilles 1994: 164.- Trilles and Randall 2011: 453-454.

Type species.

Livoneca emarginata Bleeker, 1857, by monotypy ( Schioedte and Meinert 1884).

Remarks.

Diagnostic characters for Elthusa include a weakly vaulted body; pleonite 1 as wide as or slightly narrower than pleonite 2; posterior margin of cephalon not trilobed; wide pleon; antennula shorter than antenna, bases not in contact (varying from close together to wide apart); and pleopods all simple, lamellar. A revised diagnosis of the genus was provided by Bruce (1990) as well as Trilles and Randall (2011).

Elthusa can be regarded as one of the most morphologically varied cymothoid genera, with many Elthusa species still requiring detailed study and redescription. The antennula position (being close together or far apart), shape of the cephalon anterior margin, as well as the width of the pleon and pleonite 5 are some of the varying characters noted within species of this genus ( Bruce 1990). This variation can cause confusion in genus identifications and may lead to incorrect species placement if not taken into account with all of the other genus characters.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Isopoda

Family

Cymothoidae