Elaphoidella Chappuis, 1929

Watiroyram, Santi, Sanoamuang, La-Orsri & Brancelj, Anton, 2017, Two new species of Elaphoidella (Copepoda, Harpacticoida) from caves in southern Thailand and a key to the species of Southeast Asia, Zootaxa 4282 (3), pp. 501-525 : 522-523

Key to species of Elaphoidella Chappuis, 1929 from SEA based on males

Note: males of E. affinis , E. bidens , E. cornuta , E. elegans , E. jaesornensis , E. longipedis , E. namnoaensis , E. superpedalis ?, E. trisaetosa are so far unknown)

1 P5 Exp with less than 4 setae............................................................................2

- P5 Exp with 4 setae................................................................................... 11

2 P5 Exp with 2 setae....................................................................................3

- P5 Exp with 3 setae....................................................................................4

3 P4 Endp-2 with 2 elements..................................................................... E. javaensis

- P4 Endp-2 with 3 elements.................................................................... E. margaritae

4 P1 Endp 2-segmented..................................................................................5

- P1 Endp 3-segmented..................................................................................6

5 P4 Endp absent........................................................................... E. thailandensis

- P4 Endp present......................................................................... E. sanoamuangae

6 P2 Endp-1 with inner seta...............................................................................7

- P2 Endp-1 without inner seta............................................................................9

7 P2 Endp-2 with 4 elements.................................................................... E. grandidieri

- P2 Endp-2 with 3 elements..............................................................................8

8 Posterior margin of urosomites weakly serrate.................................................. E. bromeliaecola

- Posterior margin of urosomites strongly serrate................................................... E. thienemanni

9 P4 Endp-2 with 2 elements........................................................................ E. labani

- P4 Endp-2 with 3 elements.............................................................................10

10 P2 Endp-2 with 3 elements..................................................................... E. malayica

- P2 Endp-2 with 4 elements.................................................................... E. vietnamica

11 P4 Exp-3 without transformed spine......................................................................12

- P4 Exp-3 with transformed spine........................................................................15

12 P4 Endp-2 with 2 elements....................................................................... E. similis

- P4 Endp-2 with 3 elements.............................................................................13

13 P2 Endp-2 with 5 elements................................................................ E. ligorae sp. nov.

- P2 Endp-2 with 4 elements.............................................................................14

14 P2 Endp-1 with inner seta...................................................................... E. cuspidata

- P2 Endp-1 without inner seta........................................................... E. paraaffinis sp. nov.

15 P2 Endp-2 with 3 elements.................................................................. E. sewelli s. str.

- P2 Endp-2 with 4 elements.............................................................................16

16 Caudal ramus with dorsal keel................................................................. E. intermedia

- Caudal ramus without dorsal keel................................................................ E. bryophila