Himalayapotamon

Pati, S. K. & Singh, S., 2017, A new species of freshwater crab of the genus Himalayapotamon Pretzmann, 1966 (Decapoda, Brachyura: Potamidae: Potaminae) from Uttarakhand, northern India, Zootaxa 4237 (1), pp. 191-200: 198-199

publication ID

https://doi.org/10.11646/zootaxa.4237.1.11

publication LSID

lsid:zoobank.org:pub:3B99DC75-4231-478C-9831-D03E7B0BAE93

persistent identifier

http://treatment.plazi.org/id/03E12015-3F26-8D44-FF22-4B55F9DBFD70

treatment provided by

Plazi

scientific name

Himalayapotamon
status

 

Key to the species of Himalayapotamon 

1. Sixth male abdominal somite short, median length nearly two-fifth greatest width ( Fig. 5C View Figure )..........................2

- Sixth male abdominal somite long, median length nearly half greatest width ( Figs. 2 View Figure C, 5D)......................... 3

2. G1 terminal joint conical, with tip slightly curved outwards ( Fig. 5 View Figure E)............................................................................................. H. bifarium ( Alcock, 1909)  [ INDIA (Sikkim)? or MYANMAR?] 

- G1 terminal joint S-shaped ( Fig. 5 View Figure F)............... H. monticola ( Alcock, 1910)  [ INDIA (Meghalaya and West Bengal)] 

3. Male telson with acute apex (see Pretzmann 1966: pl. 3, fig. 11)..................................................................................................... H. kasaulis ( Pretzmann, 1966)  [ INDIA (Himachal Pradesh)] 

- Male telson with rounded apex ( Figs. 2 View Figure C, 5D)............................................................. 4

4. Epigastric and postorbital cristae separated by indistinct groove ( Fig. 5B View Figure )............................................................................................... H. ambivium ( Alcock, 1909)  [ INDIA (Himachal Pradesh)] 

- Epigastric and postorbital cristae separated by distinct groove ( Fig. 2 View Figure A)......................................... 5

5. G1 terminal joint sinuous (see Brandis 2001: fig. 3c).................................................................... H. atkinsonianum (Wood-Mason, 1871)  [ BHUTAN, INDIA (Meghalaya, Sikkim and West Bengal) and NEPAL] 

- G1 terminal joint conical, with almost straight margins ( Fig. 3 View Figure A)............................................... 6

6. G1 terminal joint slender (see Brandis 2001: fig. 4c)......................................................... 7

- G1 terminal joint stout ( Fig. 3 View Figure A)......................................................................... 9

7. G1 terminal joint blunt towards tip (see Brandis 2001: fig. 4c).................................................... H. emphyseteum ( Alcock, 1909)  [ INDIA (Himachal Pradesh, Jammu and Kashmir and Uttarakhand), NEPAL and PAKISTAN] 

- G1 terminal joint distinctly narrowing towards tip (see Bott 1970: pl. 38, fig. 19).................................. 8

8. G1 terminal joint short, ca. 0.3 times length of subterminal joint (see Bott 1970: pl. 38, fig. 19)............................................. H. koolooense ( Rathbun, 1904)  [ AFGHANISTAN, INDIA (Himachal Pradesh, Meghalaya, Sikkim, Uttar Pradesh, Uttarakhand and West Bengal) and NEPAL] 

- G1 terminal joint long, ca. 0.4 times length of subterminal joint (see Brandis & Sharma 2005: fig. 5C).............................................................................. H. sunkoshiense Brandis & Sharma, 2005  [ NEPAL]

9. G1 terminal joint suddenly tapers distally (see Bouvier 1918: fig. 10I).................................................................................................. H. babaulti ( Bouvier, 1918)  [ INDIA (Himachal Pradesh)] 

- G1 terminal joint gradually tapers distally ( Fig. 3 View Figure B).........................................................10

10. Postorbital cristae almost straight (see Pretzmann 1963: pl. 1, fig. 1); male telson with straight lateral margins (see Pretzmann 1963: pl. 1, fig. 4); G1 terminal joint long, ca. 0.3 times combined length of subterminal joint and flexible zone (see Pretzmann 1963: pl. 3, fig. 11)........................................ H. marinellii ( Pretzmann, 1963)  [ INDIA (West Bengal)] 

- Postorbital cristae distinctly curved ( Fig. 2 View Figure A); male telson with concave lateral margins ( Fig. 2 View Figure C); G1 terminal joint short, ca. 0.2 times combined length of subterminal joint and flexible zone ( Fig. 3 View Figure A).... H. garhwalense  n. sp. [ INDIA (Uttarakhand)]