Bouvieraxius Sakai and de Saint Laurent, 1989

Poore, Gary C. B. & Collins, David J., 2009, Australian Axiidae (Crustacea: Decapoda: Axiidea), Memoirs of Museum Victoria 66 (2), pp. 221-287 : 244-245

Bouvieraxius Sakai and de Saint Laurent, 1989

Bouvieraxius Sakai and de Saint Laurent, 1989: 45 .— Sakai, 1992: 165–166.—Poore, 2008: 161–162.

Posthonocaris Kensley, 1989: 964 .

Type species. Axius longipes Bouvier, 1905 , by original designation.

Diagnosis. Carapace smooth; cervical groove visible laterally over almost half distance to anterolateral margin. Rostrum triangular, acute, laterally denticulate, longer than eyestalks, not depressed below level of carapace, continuous with definite lateral carinae; supraocular spines barely differentiated from other spines; lateral carina smooth; submedian carina present, spinose; median carina smooth; postcervical carina absent. Abdominal somite 1 pleuron acute; pleuron 2 broad, anteriorly rounded, posteriorly rounded; pleura 3–5 posteriorly rounded. Eyestalk cylindrical, articulating; cornea pigmented. Antenna, scaphocerite long, acute. Maxilliped 3 exopod not clearly bent at base of flagellum. Pleurobranchs present over pereopods 2–4; podobranchs and arthrobranchs well developed; epipods present on maxilliped 2 to pereopod 4. Pereopods 1 subequal, with propodus cylindrical; carpus-dactylus upper margins smooth, with distal tooth on propodus. Pereopods 3–5 propodi with transverse rows of robust setae; dactyli tapering, with longitudinal row of robust setae. Pleopods 3–5, appendix interna absent. Pleopod 1 of male present, of 3 articles, second lobed and with field of hooks (appendix interna remnant). Pleopod 2 of male with appendix masculina elongate and with appendix interna. Uropodal exopod with transverse suture. Telson with lateral fixed spines and posterolateral robust setae; apex truncate-rounded.

Remarks. The genus has been discussed but not recently redefined. It is defined by the combination of uropodal exopod with a transverse suture, three pairs of pleurobranchs, toothed triangular rostrum, male pleopods 1 and 2 present and, importantly, pleopods 3–5 without an appendix interna (not ‘with’ as in the key of Poore, 2008).