Anisonyches, Pollock, 1975

Pérez-Pech, Wilbert Andrés, Jesús-Navarrate, Alberto De, Demilio, Erica, Anguas-Escalante, Abril & Hansen, Jesper Guldberg, 2020, Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae), Zootaxa 4731 (4), pp. 492-508 : 494

Anisonyches sp.

1 specimen ( ML: 1 indeterminable gender)

Remarks: The single specimen possesses primary and secondary clavae, median cirrus, eyes, and accessory hooks only on the internal claws. It belongs to the group of Anisonyches species that possess primary clavae ( A. diakidius Pollock, 1975 ; A. mauritianus Grimaldi de Zio, D’Addabbo Gallo, Morone De Lucia & D’Addabbo, 1987 ; A. eleutherensis Bartels, Fontoura & Nelson, 2018 ). Yet, the elongated dome shape of the primary clavae is unique among all described Anisonyches . In addition, the scapus of the internal and external cirri is short, bulbous and nearly spherical. The claws are of the mauritianus - type with basal spurs narrowly diverging from each other. Of the four claws on legs I–III, the outermost internal claw is the longest and the innermost external claw is the shortest, being less than half the length of the internal claws. These characters indicate that the specimen represents an undescribed species but the presence or absence of leg sense organs cannot be determined with certainty. Consequently, a formal description awaits the finding of further specimens.