Typhlotanaidae, Sieg, 1976

Błażewicz-Paszkowycz, Magdalena, 2007, Figure 6. Typhlotanais Compactus, Female A In Family Nototanaidae Sieg, 1976 And Typhlotanaidae Sieg, 1984, Zootaxa 1598, pp. 1-141 : 25

Key for Typhlotanaidae genera and morpho-groups

1. Body short, five or less times as long as wide ( Fig. 11A )............................................................................2

- Body long, six or more times as long as wide ( Fig. 11 A’)............................................................................8

2. Antennule twice as long as carapace ( Fig. 11B ) ............................................................................................ ..................................................‘ eximus ’ group ( T. penicillatus , Typhlotanais sp. A , T. eximus , T spinipes )

- Antennule about as long as carapace ( Fig. 11 B’)........................................................................................3

3. Pereopods 4–6 dactylus and unguis fused and modified to hook ( Fig. 11I ).......................... Typhlotanoides

- Pereopods 4–6 dactylus not fused with unguis, both normally developed ( Fig. 11 I’)................................4

4. Pereopods 4–6 with specialized hooks on carpus ( Fig. 11C ) ..................................................... Obesutanais

- Pereopods 4–6 with prickly tubercles on carpus ( Figs 11D , D’) ................................................................ 5

5. Pereopods 4–5 unguis bifurcated ( Fig. 11 D’), propodus distal seta longer than dactylus unguis combined ( Fig. 11 D’) ...... ‘ cornutus ’ group ( T. cornutus , T. crassus , T. andeepae n. sp., T. adipatus sensu Tzareva )

- Pereopods 4–5 unguis simple ( Fig. 11D ), propodus distal seta shorter than dactylus ( Fig. 11D )................6

6. Uropod exopod 2-articled ............................................................................................................. T. grahami

- Uropod exopod 1-articled.............................................................................................................................7

7. Uropod exopod minute, less than half endopod length ................................................................... T. parvus

- Uropod exopod longer than half endopod length ....................................................... Larsenotanais n. gen.

8. Pereonites 1–3 corrugated ( Fig. 11E ) ............... ‘ plicatus ’ group ( T. plicatus , T. longimanus , T. variabilis )

- Pereonites 1–3 smooth (not corrugated).......................................................................................................9

9. Uropod exopod equal or subequal to endopod ( Fig. 11F ); pereonites 2–5 semi-annulated proximally and distally ( Fig. 11G ) ................................................................................................................ Peraeospinosus

- Uropod exopod shorter than endopod ( Fig. 11H ); pereonites 2–5 smooth (without rings)........................10

10. Pleotelson distal projection with two strong spiniform setae ( Fig. 11J ) ........................................................ ............................................................................... ‘ spinicauda ’ group ( T. spinicauda , T. squamiger n. sp.)

- Pleotelson distal projection without strong setae ( Fig. 11H )......................................................................11

11. Pereopod coxa 1–3 with spur ( Fig. 11K )................................................................................................... 12

- Pereopod coxa 1–3 without spur ( Figs 11L ).............................................................................................. 13

12. Pereonite-1 with long setae dorsodistally ( Fig. 12A ) ......................................................... T. mimosis n. sp.

- Pereonite-1 without long setae dorsodistally... ‘ greenwichensis ’ group ( T. messinensis , T. greenwichensis )

13. Pereopods 1–3 ischium with long seta ( Fig. 11M ); antenna article-2 and 3 with ventral hooks ( Fig. 11 N’). ....................................................................................... ‘ trispinosus ’ group ( T. trispinosus , T. tenuicornis )

- Pereopod-1-3 ischium with short seta ( Figs 11K, L ); antenna article-2 and 3 without teeth ( Fig. 11N )...14

14. Pereopods 4–6 carpus with specialized hooks ( Fig 12B ) ............................................... Hamatipeda n. gen.

- Pereopod 4–6 carpus with prickly tubercles ( Fig. 12G–I )..........................................................................15

15. Pereonite-1 almost as long as carapace ( Fig. 12D ) .......................................................... Pulcherella n. gen.

- Pereonite-1 clearly shorter than carapace ( Figs 12C, E )............................................................................16

16. Antennule over twice as long as carapace ( Fig. 12 C ); prickly tubercles on pereopods 4–6 minute ( Fig. 12J ) .................................................................................................................................... Typhlamia n. gen.

- Antennule shorter than double length of carapace ( Figs 12D, E, K )..........................................................17

17. Prickly tubercles on pereopods 4–6 surrounded by spines ( Figs 12G , G’) ........................ Torquella n. gen.

- Prickly tubercles on pereopods 4–6 simple, not surrounded by spines ( Figs 12 H–J )...............................18

18. Large gap between cheliped bases and pereonite-1 ventrally ( Fig. 12L ) ...................................................... ................................................................................................. ’ mixtus ’ group ( T. mixtus , T. mimosis n. sp.)

- Small (or no) gap between cheliped basis and pereonite-1 ventrally ( Figs 12 K , L’)...............................19

19. A few setae on pereopod-1 basis and carpus dorsal edge ( Fig. 12M ) ............................................................ .......................................................................................................... T. aequiremis ( Typhlotanais sensu str .)

- No setae on pereopod-1 basis and carpus dorsal edge ( Fig. 12 M’) .......................... Typhlotanais sensu lato

Figures

FIGURE 11. Morphological characters used in the key to Typhlotanaidae. A) Typhlotanais sp. A, dorsal view; A’) T. spiniventris, dorsal view; B) Typhlotanais sp. A, proximal part of body dorsal view; B’) L. amabilis n. sp., proximal part of body dorsal view; C) O. sigridae, pereopod-5; D) T. mimosis n. sp., pereopod-5; D’) T. andeepae n. sp. pereopod-5; E) T. plicatus, lateral view; F) P. kerguelenensis, uropod; G) P. kerguelenensis, lateral view; H) T. messinensis, pleotelson and uropod; K) T. greenwichensis, pereopod-1; L) T. juraszi n. sp., pereopod-1; M) T. tenuicornis, pereopod-2; N’) P. acruxi n. sp., antenna; N’) T. trispinosus, antenna; J) T. spinicauda, pleotelson and uropod.

FIGURE 12. Morphological characters used in the key to Typhlotanaidae (continued). A) T. mimosis n. sp., proximal part of body dorsal view; B) H. trapezoida n. sp. pereopod-6; C) T. mucronatus, lateral view of proximal body part; D) P. pulcher, lateral view of proximal body part; E) T. variabilis n. sp., lateral view of proximal body part; F) T. spinicauda, dorsal view; F’) T. mucronatus, dorsal view; G, G’) P. kerguelenensis, pereopod-4; H) T. mimosis, pereopod-5; I) P. filatovae, pereopod-6; J) P.pulcher; K) T. andeepae; L) T. mixtus, carapace ventral view; L’) T. aequiremis, carapace ventral view; M) T. aequiremis, pereopod-2; M’) T. inaequipes, pereopod-2.