Onycocaris anomala sp. nov., a new pontoniine shrimp from the Northern Territory, Australia

Abstract

A new species of pontoniine shrimp, Onycocaris anomala sp. nov., from Port Darwin, Australia, is described and illustrated. The specimens are incomplete but the morphological features of systematic value can be discerned. The specimens, probably associates of sponges, are most closely related to the incompletely known Typton dentatus Fujino and Miyake, particularly on account of the characteristic morphology of the endites of the maxilla and first maxilliped, and it is considered probable that further material of T. dentatus may indicate that a new genus is necessary for the inclusion of these two species, which are atypical of both Onycocaris Nobili and Typton Costa, as at present defined.