Paratya Miers, 1882

Suter, Phillip J., Mynott, Julia H. & Crump, Megan, 2022, New species of Paratya (Decapoda: Atyidae) from Australian inland waters - linking morphological characters with molecular lineages, Memoirs of Museum Victoria (Mem. Mus. Vic.) 81, pp. 55-122 : 62

Genus Paratya Miers, 1882

Paratya australiensis Kemp 1917

Diagnosis: Rostrum longer or shorter than carapace, usually slender and pointed; dorsally armed with 11–34 teeth of which 0–4 are postorbital spines; ventrally with 1–14 large serrations; dorsal edge straight or very slightly concave.

Eyes well developed, darkly pigmented.

Carapace with supraorbital spine large and distinct, antennal spine smaller; pterygostomian spine indistinct, but pterygostomium angle quite acute; hepatic spine absent.

Antenna 1 length about half body length. Peduncle with numerous finely setose spines in row near lateral, ventral and distal margins and along medial edge; lateral distal angle of first segment with prominent acute process or stylocerite that reaches to distal border of peduncle segment.

Antenna 2 longer than body. Peduncle first segment without setae, overlapping second segment dorsally, with prominent tooth at outer distal angle; second segment with short row of setae dorsally; third segment with group of setae at inner distal angle. Scaphocerite with regular row of setose spines on inner and distal margins; outer margin extending to a sharp point overreached by lamella. Flagellum long and slender.

Maxillipeds 1 exopod flagellum distinct, well developed and with numerous long setose spines on all margins, approximately half the length of the caridean lobe; caridean lobe broad with numerous short setose spines on outer margins and a few on body of lobe; epipodite small. Maxilliped 2 exopod long and narrow, several setose spines of various lengths near tip and basally. Epipodite with podobranch.

Maxilliped 3 basal segment curved, apical segment with large terminal claw, medial distal margin with broad teeth-like spines, largest in basal third, outer margin with broad tooth-like spines longest in basal third; several transverse spine rows near base; mid and basal segments with several short simple spines. Exopod long and narrow, with several long setose spines near tip and several short setose spines near base. Epipodite with basal conical projection.

Pereiopods 1–5 all possessing an exopodite, only pereiopods 1–4 with epipodite. Pereiopods 1 and 2 with propodus and dactylus forming chelae each with a terminal tuft of setae. Dactylus of pereiopod 3 and 4 with a prominent terminal claw and strong spines on medial margin; dactylus of pereiopod 5 with prominent terminal claw and very regular, comb-like row of numerous small spines on medial margin.

Pleopod 1 male with endopod about half length of exopod, narrowly ovate at base, usually excavated distally with numerous long setose spines laterally and medial spines.

Pleopod 2 appendix masculina present in males, absent in females. Appendix interna long and narrow about one-fifth of length of endopod and exopod, distal margin with long setae. Peduncle with short and long spines.

Telson long and tapers towards posterior, dorsal surface with 2–3 pairs of strong sub-marginal teeth-like spines, posterior margin with 1 pair of spine-like teeth and 6–14 long strong terminal spines.