Nototanaidae, Sieg, 1976

Kakui, Keiichi & Yamasaki, Hiroshi, 2013, Nototanaids (Crustacea: Tanaidacea) from Japan, with the Description of a New Species of Nototanoides, Species Diversity 18, pp. 245-254 : 253-254

Key to genera of the families Nototanaidae and Tanaissuidae

1. Eyes absent or, if present, lacking ommatidia.................. .................................2 ( Tanaissuidae except Unitanaissus )

– Eyes present, bearing ommatidia....................................... .................................... 5 ( Nototanaidae and Unitanaissus )

2. Pereopod 6 carpus with two distal spiniform setae; propodus with one dorsodistal seta ............... Bathytanaissus

– Pereopod 6 carpus with three or four distal spiniform setae; propodus with two or three dorsodistal setae..... 3

3. Pereopod 1 with dactylus-unguis shorter than propodus.......................................................................... Tanaissus

– Pereopod 1 with dactylus-unguis longer than propodus .............................................................................................. 4

4. Ventrodistal region of pereopod 6 propodus with one spiniform seta and one long simple seta (longer than half propodus length).................................. Molotanaissus

– Ventrodistal region of pereopod 6 propodus with two subequal spiniform setae or naked............... Protanaissus

5. Pereopod 4 carpus without distal spiniform setae .......... ................................................ Unitanaissus (Tanaissuidae)

– Pereopod 4 carpus with two or more distal spiniform setae ..........................................................6 ( Nototanaidae )

6. Pleopod absent in female, or reduced to one article in male ......................................................................... Gamboa

– Pleopod biramous in both sexes...................................... 7

7. Pleopodal endopod with one mid-inner plumose seta ............................................................................. Birdotanais

– Pleopodal endopod without mid-inner plumose seta .............................................................................................. 8

8. Fixed finger with three or more ventral simple setae. (Female) antennule article 3 with several aesthetascs in proximal half ...................................................................... 9

– Fixed finger with two or fewer ventral simple setae. (Female) antennule article 3 without aesthetascs in proximal half .................................................................... 10

9. Pleonites 1–5 with two (one in pleonite 5) lateral simple setae; carpus of pereopods 2 and 3 with simple setae only .................................................... Paranesotanais

– Pleonites 1–5 with lateral row of simple setae; carpus of pereopods 2 and 3 with three or four spiniform setae.... .......................................................................... Nototanoides

10. Dactylus of pereopods 2 and 3 with ventrodistal spine; dactylus-unguis of pereopods 4–6 nearly straight, without thick basal portion (falciform).................... Stachyops

– Dactylus of pereopods 2 and 3 without ventrodistal spine; dactylus-unguis of pereopods 4–6 curved ventrally, with thick basal portion (claw-shaped) ............. 11

11. (Male) chela in normal direction; (female) maxillipedal bases with short simple seta (not reaching to distal margin of endite) ............................................... Nototanais

– (Male) chela twisted about 90 degrees, with dactylus inward; (female) maxillipedal bases with long simple seta (reaching beyond distal margin of endite) .............................................................................. Nesotanais