Tetracanthella

Fiera, Cristina, Konikiewicz, Marta & Skarżyński, Dariusz, 2013, Tetracanthella doftana sp. nov. (Collembola, Isotomidae) from Romania, with a key to Carpathian Tetracanthella Schött, 1891, Zootaxa 3691 (4), pp. 467-472 : 471

Key to Carpathian Tetracanthella

The key is based mainly on Potapov (2001) and Smolis & Skarżyński (2006). Distribution of Tetracanthella species in the Carpathians is presented in Tab. 1.

1 Ventromedial chaetae on thorax III present................................................................ 2

- Ventromedial chaetae on thorax III absent.................................................................. 3

2. 3 sublobal hairs, retinaculum with 2 + 2 teeth and one chaeta............................ T. fjellbergi Deharveng, 1987

- 4 sublobal hairs, retinaculum with 3 + 3 teeth and no chaeta................... T. pericarpatica Kaprus’ & Tsalan, 2009

3 Thoracic terga II, III with at most 2 + 2 macrochaetae each.................................................... 4

- Thoracic terga II, III with 3 + 3 macrochaetae each.......................................................... 10

4 Mucro absent........................................................................................ 5

- Mucro present....................................................................................... 6

5 Empodium and retinaculum entirely absent............................................. T. brevifurca Stach, 1929

- Empodium 1/5–1/6 of inner edge of claws III, retinaculum present.................... T. ignisiana Dányi & Traser, 2008

6 Three macrochaetae on abdominal tergum III.............................................................. 7

- Two macrochaetae on abdominal tergum III................................................................ 8

7 Dens with 2 dorsal and 1 ventral chaetae............................................... T. ksenemani Nosek, 1964

- Dens with 3 dorsal and 1 ventral chaetae.................................................. T. gruiae Rusek, 1979

8 Dens with 2 dorsal and 1 ventral chaetae........................................... T. borsa Dányi & Traser, 2008

- Dens with 3 dorsal and 1 ventral chaetae.................................................................. 9

9 Retinaculum without chaeta, empodium length about 1/2 of inner edge of claw III................... T. doftana sp. nov.

- Retinaculum with chaeta, empodium lenght about 1/3 of inner edge of claw III.................... T. pilosa Schött, 1891

10 Dens with 3 dorsal and 1 ventral chaetae.................................................................. 11

- Dens with 2 dorsal and 1 ventral chaetae.................................................................. 12

11 One sublobal hair, retinaculum with chaeta.............................................. T. montana Stach, 1947

- Two sublobal hairs, retinaculum without chaeta........................................... T. carpatica Stach, 1947

12 Postantennal organ/ocellus A ratio: 1.5–2, anterior furcal subcoxa with 8 chaetae, posterior with 4 chaetae, manubrium with 8– 9 + 8–9 chaetae............................................................ T. transylvanica Cassagnau, 1959

- Postantennal organ/ocellus A ratio: 2.3–3.2, posterior furcal subcoxa with 3 chaetae, manubrium with 5–7 + 5–7 chaetae. 13

13 Anterior furcal subcoxa with 2–3 chaetae.............................................. T. franzi Cassagnau, 1959

- Anterior furcal subcoxa with 4–5 chaetae.............................................. T. hystrix Cassagnau, 1959