Macandrewella serratipes, Ohtsuka & Nishida & Nakaguchi, 2002

Ohtsuka, Susumu, Nishida, Shuhei & Nakaguchi, Kazumitsu, 2002, Three new species of the genus Macandrewella (Copepoda: Calanoida: Scolecitrichidae) from the Paci ® c Ocean, with notes on distribution and feeding habits, Journal of Natural History 36 (5), pp. 531-564 : 560-561

Key to species of Macandrewella

Female

The female of Macandrewella chelipes Giesbrecht, 1896 was ®rst described by Campaner (1989), but is not included in this key, because species-speci®c characters of the prosome, urosome, and leg 5 are not mentioned in his description.

1 Genital double-somite with large dorsal or dorsolateral projection (s)..... 2 Genital double-somite without such projection(s).......... 4

2 Genital double-somite with large, pointed, mid-dorsal process near posterior margin.................... M. agassizi Wilson, 1950 Genital double-somite with swelling(s) on right dorsolateral side...... 3

3 Genital double-somite with single dorsolateral swelling present on right posterior corner.................. M. sewelli Farran, 1936 Genital double-somite with two dorsolateral swellings on right anterior portion...................... M. serratipes n. sp.

4 Leg 5 present.................... 5 Leg 5 absent.................... 6

5 Two distinct spines on terminal segment of leg 5.... M. joanae Scott, 1909 One to three elements on terminal segment of leg 5, some or all of which rudimentary................... M. stygiana n. sp.

6 Caudal setae on right and left sides asymmetrical (left seta V much longer than right).............. M. cochinensis Gopalakrishnan, 1973 Caudal setae on right and left sides symmetrical.......... 7

7 Genital double-somite symmetrical; linguiform genital operculum absent....................... M. scotti Sewell, 1929 Genital double-somite asymmetrical, swollen on right lateral side; linguiform genital operculum present................... 8

8 Prosome with one lateral and one dorsolateral process terminally on right side..................... M. mera Farran, 1936 Prosome ending in single point............... 9

9 Prosomal ends reaching to midway of genital double-somite........................ M. asymmetrica Farran, 1936 Prosomal ends reaching nearly to or beyond posterior margin of genital double-somite.................... M. omorii n. sp.