Tanaella

Guerrero-Kommritz, Jürgen & Blażewicz-Paszkowycz, Magdalena, 2004, New species of Ta n a e l l a Norman and Stebbing, 1886 (Crustacea: Tanaidacea: Tanaellidae) from the deep­sea off the Antarctic and the Angola Basin, with a key to the genus, Zootaxa 459, pp. 1-20 : 19-20

Key for the species of Tanaella (modified after Larsen & Heard 2004)

1. Uropod composed of protopod and biarticulated endopod ........................................... 2

­ Uropod composed of protopod and uniarticulated endopod ......................................... 5

2. Cephalothorax as long as broad .......................................................... T. rotundicephala

­ Cephalothorax longer than broad .................................................................................. 3

3. Pleotelson apex pointed ............................................................................... T. unisetosa

­ Pleotelson apex blunt .................................................................................................... 4

4. Cheliped fixed finger with several acute denticles, cheliped dactylus with two spini­ form setae on inner margin ........................................................................... T. forcifera

­ Cheliped fixed finger without acute denticles, cheliped dactylus with one spiniform setae on inner margin ................................................................................ T. propinquus

5. Uropods longer than pleotelson..................................................................................... 6

­ Uropods as long as, or shorter than, pleotelson............................................................. 9

6. Pleotelson apex pointed. Male antennula with five articles ...................... T. tuberculata

­ Pleotelson apex smoothly rounded. Male antennula with four articles......................... 7

7. Uropodal protopod longer than half of endopod .......................................... T. orchacea

­ Uropodal protopod shorter than half of endopod.......................................................... 8

8. Pleotelson as long as last two pleonites together, dactylus and unguis of pereopods 1–3 shorter than propodus, one seta on basal article of uropod. Male pleopods with setu­ lose setae .................................................................................................. T. prolixcauda

­ Pleotelson as long as last three pleonites together, dactylus and unguis of pereopods 1– 3 as long as propodus, no seta on basal article of uropod. Male pleopods without setu­ lose setae ......................................................................................... T. profunda sp. nov.

9. Cheliped dactylus with proximal process on inner margin ....................... T. ungucillata

­ Cheliped dactylus without proximal process on inner margin.................................... 10

10 Uropod shorter than pleotelson. Pereopods 4–6 with ventral margin of propodus ser­ rated and with setules ................................................................................................. 11

­ Uropod as long as pleotelson.Pereopods 4–6with ventral margin of propodus not serrated

..................................................................................................................................... 12 11 Basis of pereopod 1, margin with minute setae. Male propodus of pereopod 6 without several hook­shaped serrated distal spiniform setae ............................... T. kimi sp. nov. ­ Basis of pereopod 1 margin lacking setae, naked. Male propodus of pereopod 6 with several hook­shaped serrated distal spiniform setae .................................. T. mclellandi

12 Cheliped carpus with a long seta. Chela with serration on proximal part of cutting edge ................................................................................................................ T. paraforcifera

­ Cheliped carpus without a seta. Chela smooth on proximal part of cutting edge ........... ......................................................................................................... T. eltaninae sp. nov.