Parasesarma leptosoma
Creators: name: Li, Jheng-Jhang
name: Rahayu, Dwi Listyo
name: Ng, Peter K. L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Sesarmidae
Parasesarma
Parasesarma leptosoma

description: Key to species of the Parasesarma leptosoma species-complex
1. Frontal margin nearly straight in dorsal view (Fig. 2A); P3 and P4 relatively stout (merus length/width ratio approximately 2.4; propodus length/width ratio 4.1) (Fig. 1E). (South and East Africa)..................... P. leptosoma (Hilgendorf, 1869)
- Frontal margin concave in dorsal view (e.g. Fig. 5A); P3 and P4 relatively slender (merus length/width ratio more than 2.4; propodus length/width ratio more than. 4.1) (e.g. Fig. 20A).................................................... 2
2. P3 and P4 very slender (merus length/width ratio 3.1; propodus length/width ratio 5.9), dactylus very short (dactylus/propodus length ratio 0.3) (Fig. 20D). (Papua, Indonesia)................................................ P. gracilipes n. sp.
- P3 and P4 broader (merus length/width ratio 2.5‾2.6; propodus length/width ratio 4.4‾4.8), dactylus relatively longer (dacty- lus/propodus length ratio c. 0.4) (e.g. Fig. 20A).............................................................. 3
3. G1 apical process short (e.g. Fig. 10E)..................................................................... 4
- G1 apical process long (e.g. Fig. 5D)...................................................................... 7
4. Coxae of P3 and P4 with dense setae (Fig. 15E). (Philippines).................................... P. parvulum n. sp.
- Coxae of P3 and P4 without dense setae (e.g. Fig. 4B)........................................................ 5
5. Carapace 1.2 times broader than long (Fig. 13A); consistently 9 tubercles on dactylus of male cheliped (Fig. 19F). (Malaysia)..................................................................................... P. purpureum n. sp.
- Carapace 1.1 times broader than long (e.g. Fig. 9A); 9 or 10 tubercles on dactylus of male cheliped (e.g. Fig. 20D)........ 6
6. P3 and P4 about 1.8 times carapace width; G1 apical process slightly bent at angle of 60°, ending in truncated tip (Fig. 2L). (Sulawesi, Indonesia)............................................................ P. limbense (Rathbun, 1914)
- P2 and P3 about 1.6 times carapace width; G1 apical process bent at angle of 45°, ending in rounded tip (Fig. 10E). (Taiwan) ............................................................................................ P. kui n. sp.
7. Shape of frontal border in dorsal view distinctly concave (Fig. 8A); 6–8 tubercles on dactylus of male cheliped (Fig. 19C). (Taiwan and Philippines).................................................................... P. macaco n. sp.
- Shape of frontal border in dorsal view slightly concave to straight (this state is not consistent with the couplet 1) (e.g. Fig. 5A); 9 or more tubercles on dactylus of male cheliped (e.g. Fig. 19B)................................................ 8
8. Male cheliped dactylus with 9–15 (Fig. 19B); P3 propodus not broader than P4 propodus (Fig. 20A). (Japan, Guam, Fiji and Vanuatu)................................................................................. P. gecko n. sp.
- Male cheliped dactylus with 10–12 tubercles (Fig. 19H); P3 propodus broader than P4 propodus (Fig. 20G). (Sulawesi, Indonesia)................................................................................. P. tarantula n. sp.
description: Published as part of Li, Jheng-Jhang, Rahayu, Dwi Listyo & Ng, Peter K. L., 2018, Identity of the tree-spider crab, Parasesarma leptosoma (Hilgendorf, 1869) (Decapoda: Brachyura: Sesarmidae), with descriptions of seven new species from the Western Pacific, pp. 451-490 in Zootaxa 4482 (3) on page 480, DOI: 10.11646/zootaxa.4482.3.2, http://zenodo.org/record/1440707