Transkalliapseudes, Drumm, David T. & Heard, Richard W., 2006

Drumm, David T. & Heard, Richard W., 2006, Transkalliapseudes spinulata, new genus, new species (Crustacea: Tanaidacea: Kalliapseudidae) from the northwest Australian shelf, Zootaxa 1298, pp. 17-27 : 18-19

Genus Transkalliapseudes , new genus

Diagnosis. Labial palp with a very elongate, acuminate inner tip. Inner lobe of moveable endite of maxilla with spiniform setae terminating in 3 cusps. Cheliped and pereopod I lacking exopodite. Pereopod I dactylus represented by a sensory organ terminating in a tuft of setae. Pereopod II and III dactylus with setose digitiform lobe. Pereopod IV and V dactylus with 2 distal sensory setae. Pereopod VI with dactylus bearing a single distal seta.

Type Species. Transkalliapseudes spinulata , new species, here designated.

Etymology. Formed from the Latin, Trans, meaning over, across, on or to the other side of, in combination with the generic name Kalliapseudes , alluding to having features in common with the subfamily Hemikalliapseudinae Guţu, 1972.

Remarks. As mentioned earlier the presence of a large uniarticulate mandibular palp and the distinctive setation of the mandibular palp, the carpus and propodus of the cheliped, and the dactylus of the first pereopod, place Transkalliapseudes , n. gen. within the subfamily Kalliapseudinae . The Kalliapseudinae currently contains five genera, Cristapseudes Bacescu, 1980 ; Kalliapseudes Stebbing, 1910 sensu Guţu, 2006 ; Mesokalliapseudes Lang, 1956 ; Monokalliapseudes Lang, 1956 ; and Alokalliapseudes Guţu, 2006 .

Transkalliapseudes , n. g., can be differentiated from these five other genera by a combination of characters, most notably the lack of exopodites on the cheliped and pereopod I, the presence of setose sensory lobes on the dactylus of pereopods II and III, and the armature of the dactylus of pereopods IV—VI. It is distinguished from the genus Cristapseudes by possessing setose sensory lobes on the dactylus of pereopods II and III and by lacking an exopodite on the cheliped and pereopod I ( Băcescu 1980; Guţu 1996, 2006; Bamber et al. 2003). The absence of an exopod on both the cheliped and pereopod I separates it from Kalliapseudes ( Guţu 1996, 2006). The presence of a double row of plumose setae on the last article of the antennal peduncle distinguishes it from the genera Mesokalliapseudes and Alokalliapseudes . It differs from the genus Monokalliapseudes by the absence of an exopodite on pereopod I and the lack of a tuft of sensory setae on the dactylus of pereopod VI. Also, the armature of the dactylus on peropods IV­­VI of the new genus strongly resembles some species in the Hemikalliapseudinae (e.g. Bacescapseudes patagoniensis Sieg, 1986 ).

We believe that this unique combination of characters discussed above justifies the erection of this new genus. Transkalliapseudes n.g., and the other five genera now assigned to the subfamily Kalliapseudinae can be distinguished by the following key and diagnostic table ( Table 1 ).