Nototanaidae, Sieg, 1976

Kakui, Keiichi & Angsupanich, Saowapa, 2012, Birdotanais Songkhlaensis, A New Genus And Species Of Nototanaidae (Crustacea: Tanaidacea) From Thailand, Raffles Bulletin of Zoology 60 (2), pp. 421-432 : 431

Key to genera in Families Nototanaidae and Tanaissuidae , excluding P. floridensis

1. Eyes absent or, if present, lacking ommatidia. Mandibular molar acuminate or, if cylindrical, lacking broad masticatory region ........................................................... 2 (Family Tanaissuidae )

– Eyes present, bearing ommatidia. Mandibular molar cylindrical, with broad masticatory region ........ 4 (Family Nototanaidae )

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

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

3. Pereopod 1 dactylus-unguis longer than propodus. Female maxillipedal endites not fused medially ........... Protanaissus

– Pereopod 1 dactylus-unguis shorter than propodus. Female maxillipedal endites fused medially ...................... Tanaissus

4. Pleopodal endopod with one mid-inner plumose seta ............. .......................................................... Birdotanais , new genus

– Pleopodal endopod without mid-inner plumose seta ............ 5

5. Fixed finger with four or more ventral setae. Female antennular article 2 with several aesthetascs .......................................... 6

– Fixed finger with two or fewer ventral setae. Female antennular article 2 without aesthetascs ................................................. 7

6. Dactylus-unguis of pereopods 4–6 bifurcate; unguis fused to dactylus. Male chela twisted about 90 degrees, with dactylus inward. Male maxillipedal palpi present, simpler than those of female. Female maxillipedal endites without tubercles .......... ........................................................................ Paranesotanais

– Dactylus-unguis of pereopods 4–6 not furcated; unguis not fused to dactylus. Male chela in normal direction. Male maxillipedal palpi absent. Female maxillipedal endites each with two tubercles ............................................................. Nototanoides

7. Male antennule with five articles. Male chela in normal direction. Male maxillipedal palpi with four articles. Female maxillipedal endites without tubercles ....................................... Nototanais

– Male antennule with four articles. Male chela twisted about 90 degrees, with dactylus inward. Male maxillipedal palpi with two articles. Female maxillipedal endites each with two tubercles. ............................................................................... Nesotanais