Scolopendromorpha, Leach, 1815

Schileyko, Аrkаdy А., 2018, A contribution to the knowledge of the centipedes of Saint Barthélemy Island (French Antilles), with re-descriptions of Newportia heteropoda Chamberlin, 1918 and Cormocephalus impressus Porat, 1876 (Chilopoda: Scolopendromorpha), Zootaxa 4438 (1), pp. 59-78 : 76

Key to the Scolopendromorpha of Saint Barthélemy Island

1. 23 leg-bearing segments............................................................................... 2.

-. 21 leg-bearing segments............................................................................... 5.

2. Leg-bearing segment 7 with spiracles, tarsus 2 of ultimate legs of several articles and longer than tarsus 1................................................................................................... Newportia (s.str.) … 3.

-. Leg-bearing segment 7 without spiracles, tarsus 2 of ultimate legs consists of several articles or a single article which is shorter than tarsus 1........................................................................................ 4.

3. Tibiae 3/4–20 with lateral and ventral spurs.............................................. N. longitarsis virginensis

-. Tibiae 2–20 with a lateral spur only............................................................ N. heteropoda

4. Tarsungula very short, ultimate tarsus 2 of several articles..................................... Newportia (Tidops) *

-. Tarsungula normal, ultimate tarsus 2 consists of a single article................................... Scolopocryptops *

5. Leg-bearing segment 7 with spiracles............................................................... Rhysida *

-. Leg-bearing segment 7 without spiracles.................................................................. 6.

6. Eyes absent.................................................................................. Cryptops *

-. Eyes present........................................................................................ 7.

7. Spiracle atrium covered by cuticular folds................................................................. 8. -. Spiracle without cuticular folds..................................................... Otostigmus (Parotostigmus) 8. Legs without tarsal spurs....................................................... Cormocephalus : C. i. impressus -. Legs with tarsal spurs.................................................................... Scolopendra … 9. 9. Tergite 1 with an anterior transverse suture......................................................... S. crudelis -. Tergite 1 without an anterior transverse suture............................................................. 10. 10. Prefemur of legs 20 with dorsal spines............................................................ S. alternans -. Prefemur of legs 20 without dorsal spines................................................................ 11. 11. Prefemur of ultimate legs with up to 3(4) spines ventrally; tergite 21 without median suture............... S. subspinipes -. Prefemur of ultimate legs with at least 8 spines ventrally; tergite 21 with median suture.................... S. morsitans