Paratya rouxi, Suter & Mynott & Crump, 2022

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 : 110

Key to female Paratya from Australia

The following key is based on mature females and caution is required if identifying immature specimens. We have found that mature males can be identified with this key. Many of the species will key out in several couplets because we have tried to incorporate the variation present in each species of Paratya .

1 Rostrum short, not extending beyond antennal peduncle (figs12b, c, 27a) 2

1’ Rostrum long, extending beyond antennal peduncle figs 5a, f, 6a, 9a, 12a, 4

2(1) No post – orbital spines (fig. 27a), rostrum with 1–3 ventral spines over a length of less than 0.4 mm, all anterior to widest point; right mandible with paired incisors, each with two large teeth (fig. 27g); stylocerite extending to basal third of peduncle process (fig. 27b); scaphognathite of maxilla 2 truncated shorter than endite (fig. 27i)

P. rouxi n.sp. [Inland Murray–Darling Basin, New South Wales]

2’ Post–orbital spines present (fig. 12b, c), rostrum with rostrum with 3–7 ventral spines over a length of 0.4–1.1 mm; right mandible with single incisor of 4–5 large teeth (fig. 12j); stylocerite extending almost to end of peduncle process (fig. 12d); scaphognathite of maxilla 2 rounded apical almost to apex of endite (fig. 12k) 3 3(2) 2–3 post orbital spines all contiguous with rostral spines,

3–7 ventral spines over a length of 0.4–1.8mm, all anterior of widest point (fig. 12b)

P. arrostra (lineage 4B short rostrum)

3’ 1 post–orbital spine separated posteriorly from other rostral spines (fig. 12c), 4–5 ventral spines over a length of 0.6–1.2 mm, with some spines posterior to greatest width P. arrostra (lineage 4C very short rostrum)

4(1) Rostrum long extending to end or beyond scaphocerite (figs 5a, 6a, 9a, 12a, 18a, 21a, 24a, 30a) 8