Polycopinae

Tanaka, Hayato & Tsukagoshi, Akira, 2010, Two new interstitial species of the genus Parapolycope (Crustacea: Ostracoda) from central Japan, Zootaxa 2500, pp. 39-57 : 56-57

Key to genera of Polycopinae

(adapted from Chavtur, 1981; Kornicker & Iliffe, 1989)

1 Dorsal margin of second podomere of antennula with large process .................................................. Parapolycopissa

- Dorsal margin of second podomere of antennula without large process ...................................................................... 2

2 Exopodite of maxillula shorter than basis; furcal claws short and broad; copulatory organ flagellate .... Parapolycope

- Exopodite of maxillula longer than basis; furcal claws slender; copulatory organ not flagellate ................................ 3

3 Exopodite of mandibula with two podomeres with or without setae ........................................................................... 4

- Exopodite of mandibula represented by seta, or by one podomere with one to three setae ....................................... 11

4 Distal podomere of mandibular exopodite reduced in form of tubercle.................................................. Hexapolycope

- Distal podomere of mandibular exopodite well developed, tip either narrow or funnel-shaped.................................. 5

5 Carapace with rostrum; endopodite of male antenna with dorsal process.............................................. Pontopolycope

- Carapace without rostrum (anterodorsal tooth may be in place of rostrum); endopodite of male antenna with or with- out dorsal process.......................................................................................................................................................... 6

6 Frontal organ represented by two setae ........................................................................................................................7

- Frontal organ represented by one seta (which may be divided distally into two setae with common base). ............... 9

7 Carapace length less than 0.4mm; basis of mandibula with three ventral setae, distal podomere of exopodite stout and conical .............................................................................................................................................. Micropolycope

- Carapace length more than 0.4mm; basis of mandibula with four ventral and one distolateral setae, distal podomere of exopodite not stout and conical ................................................................................................................................ 8

8 Exopodite of mandibula without seta; endopodite of male antenna with hook-shaped process ............ Archypolycope

- Exopodite of mandibula with one seta; endopodite of male antenna without hook-shaped process............... Polycope

9 Frontal organ not distally divided ................................................................................................................ Eupolycope

- Frontal organ distally divided ..................................................................................................................................... 10

10 Frontal organ divided at midlength; endopodite of male antenna with hook-shaped process and dorsal process ......... ..................................................................................................................................................................... Polycopetta

- Frontal organ divided near its base; endopodite of male antenna without hook-shaped process and dorsal process .... .............................................................................................................................................................. Pseudopolycope

11 Exopodite of mandibula without single podomere but represented by 1 seta ............................................ Polycopiella

- Exopodite of mandibula with single joint with one to three setae.............................................................................. 12

12 Exopodite of mandibula with one seta.................................................................................................... Orthopolycope

- Exopodite of mandibula with two or three setae. ....................................................................................................... 13

13 Exopodite of mandibula with two setae .......................................................................................................Polycopissa

- Exopodite of mandibula with three setae.................................................................................................... Polycopinna