New species of Cletocamptus and a new and fully illustrated record of C. sinaloensis (Copepoda: Harpacticoida) from Brazil

Abstract

Two new species of harpacticoid copepods, Cletocamptus levis sp. nov. and Cletocamptus nudus sp. nov. are described from Brazil. Cletocamptus nudus sp. nov. seems to be closely related to C. schmidti based on the armature formula of mouth parts, P3 and P4, but can be separated based on the ornamentation of the anal operculum, relative length of exopodal and baseoendopodal setae of the female P5, and length ratio of the female P1 EXP:ENP. Cletocamptus levis sp. nov. seems to be more closely related to C. axi by the combination of a P1 ENP shorter than the P1 EXP, the armature formula of the mandibular palp, length: width ratio of caudal rami, and relative length of the female P3 ENP 2, male P2–P4 EXP 1, and number of segments of the male P3 ENP. It can be separated by the spinule ornamentation on the anal operculum, shape of female rostrum, relative length of outer spinules of female P2–P4 EXP, relative length of the setae on the male P5 EXP, armature of male P6, and by the dimorphic male rostrum of C. levis sp. nov. which is similar to that observed for C. retrogressus and C. albuquerquensis. Additionally, a fully illustrated record of the Mexican C. sinaloensis is reported for the first time from Brazilian waters, and C. affinis mongolicus Stěrba, 1968 is given full species status.