Parastylodactylus

Komai, Tomoyuki & Shanis, Rajool, 2011, A new species of the genus Parastylodactylus Figueira, 1971 (Crustacea: Decapoda: Caridea: Stylodactylidae) from off Kollam, southwest coast of India, Zootaxa 3140, pp. 60-68 : 67

Key to species of Parastylodactylus

1. Fifth abdominal pleuron armed with posteroventral or posterolateral tooth......................................... 2

- Fifth abdominal pleuron unarmed......................................................................... 6

2. Carapace with 5–8 postrostral spines; sixth abdominal somite less than 2.0 times as long as fifth somite; telson armed with 4 or 5 pairs of dorsolateral spines............................................................................. 3

- Carapace with 11–16 postrostral spines; sixth abdominal somite 2.2–3.0 times as long as fifth somite; telson armed with 3 pairs of dorsolateral spines (merus-ischium of third pereopod with proximoventral spine).............. P. tranterae Cleva, 1990

3. Fifth abdominal pleuron with posterolateral tooth; merus-ischium of third pereopod with proximoventral spine (carapace with supraorbital tooth)..................................................................................... 4

- Fifth abdominal pleuron with posteroventral tooth; merus-ischium of third pereopod without proximoventral spine........ 5

4. Ventral rostral spines moderately long, subequal or only slightly longer than dorsal spines; telson with 5 pairs of dorsolateral spines; meri of third to fifth pereopods without dorsodistal spinule........................... P. hayashii (Komai, 1997)

- entral rostral spines elongate, distinctly longer than dorsal spines; telson with 4 pairs of dorsolateral spines; meri of third to fifth pereopods each with dorsodistal spinule........................................... P. moluccensis Cleva, 1997

5. Rostrum less than 2.0 times as long as carapace; minute supraorbital tooth present near rostral base; hepatic groove shallow; branchiostegal tooth extending as far as antennal tooth................................... P. bimaxillaris (Bate, 1888)

- Rostrum more than 2.0 times as long as carapace; carapace lacking supraorbital tooth; hepatic groove deep; branchiostegal tooth overreaching antennal tooth............................................................. P. s u l c a t u s sp. n.

6. Carapace with 12 postrostral spines (supraorbital tooth present).............................. P. semblatae Cleva, 1990

- Carapace with 5–8 postrostral spines..................................................................... 7

7. Rostrum with 5–9 ventral spines; minute supraorbital tooth present; dactyli of third and fourth pereopods appearing biunguiculate; merus-ischium of third pereopod without proximoventral spine....................... P. bimaxillaris (Bate, 1888)

- Rostrum with less than 5 ventral spines; supraorbital tooth absent; dactyli of third and fourth pereopods not biunguiculate; merus-ischium of third pereopod with strong proximoventral spine.............................................. 8

8. Dactyli of third and fourth pereopods elongate, over half length of propodi, unarmed on flexor margin................................................................................................. P. longidactylus Cleva, 1990

- Dactyli of third and fourth pereopods shorter than half length of propodi, armed with accessory spinules on flexor margins...................................................................................... P. richeri Cleva, 1990