Caligus selenecola sp. nov. (Siphonostomatoida, Caligidae) parasitic on the hairfin lookdown Selene brevoortii (Gill) from the Gulf of California, Mexico, with some comments on Caritus tolii Rangnekar, 1984

By

Morales-Serna, Francisco Neptali
Yáñez-Rivera, Beatriz
Gómez, Samuel

Type

Article

Date of Publication

2024

Original Publication

ZooKeys

Volume

1209

Pages

43--68

Subjects

Biodiversity , Carangidae , Copepoda , Crustacea , parasite , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1209.120812

 

Abstract

Specimens of a caligid copepod (Siphonostomatoida) were found on the gills of the hairfin lookdown Selene brevoortii (Gill) (Carangidae) from off Mazatlán, Sinaloa (north-western Mexico). This material represents a new species of Caligus, C. selenecolasp. nov., and is assigned to the diaphanus species group. Within this group, only C. kapuhili Lewis, 1967, C. laticaudus Shiino, 1960, C. macrurus Heller, 1865, and C. selenecolasp. nov., have been described with a reduced outer spine 1 on the second exopodal segment of leg 1. These four species can be readily separated by the relative length of the abdomen, and the presence/absence of a process on the myxal area of the female maxilliped, the sternal furca, the postantennal process, and the spiniform process on the basal antennary segment. A full description of the new species is given with some comments on Caritus tolii Rangnekar, 1984.