Paralomis, White, 1856

Tiwari, Shivam, Padate, Vinay P., Venugopalan, Vishnu K., Cubelio, Sherine Sonia & Takeda, Masatsune, 2022, Paralomis White, 1856 (Crustacea: Decapoda: Anomura) from India, with morphological variability in Paralomis indica Alcock & Anderson, 1899, Zootaxa 5091 (2), pp. 301-329 : 326-327

Key to the species of the genus Paralomis from the Indian Ocean

1. Carapace ornamented with unequal granules.......................................................... P. stella

- Carapace ornamented with spines or tubercles.............................................................. 2

2. Carapace ornamented with spines........................................................................ 3

- Carapace ornamented with tubercles...................................................................... 7

3. Carapace densely covered with slender erect spines.......................................................... 4

- Carapace sparsely covered with small scattered granules and short spines......................................... 5

4. Pereopod 2–4 meri long, slender, P4 merus at least 0.85 PCL; abdominal somites 3–6 densely covered with short spines and acute granule................................................................................. P. taylorae

- Pereopod 2–4 meri short, P4 merus <0.75 PCL; abdominal somites 4–6 with well-spaced granules and nodules.... P. poorei

5. Pereopod 2–4 dactyli shorter than dorsal extensor margin of respective propodi, carapace with well-spaced unequal-sized conical spines................................................................................. P. staplesi

- Pereopod 2–4 dactyli longer than dorsal extensor margin of respective propodi, carapace sparsely tuberculate or granulate, with several small conical spines............................................................................. 6

6. Pereopod 3 propodus length: height ratio> 6.2 in males,> 7.3 in females................................. P. birsteini

- Pereopod 3 propodus length: height ratio ≤ 5.5 in males, <5.6 in females............................. P. gowlettholmes

7. Rostrum with unpaired dorsal median spinule; carapace with spiniform tubercles........................... P. aculeata

- Rostrum without unpaired dorsal median spinule, carapace with papilliform, rounded or conical tubercles............... 8

8. Rostrum without basal spines; carapace with several rounded tubercles................................. P. roeleveldae

- Rostrum with basal spines; carapace with papilliform or conical tubercles........................................ 9

9. Carapace with papilliform tubercles...................................................................... 10

- Carapace with conical tubercles......................................................................... 11

10. Carapace with 2 spines on anterior branchial margins.................................................... P. ceres

- Carapace with several unequal-sized spines on branchial margins................................... P. investigatoris

11. Carapace pyriform, branchial regions distinctly inflated................................................. P. indica

- Carapace pentagonal, branchial margins weakly inflated................................................ P. danida