Ctenolepisma, Escherich, 1905

Hazra, Ashis Kumar, Jana, Debanjan, Mandal, Guru Pada & Molero-Baltanás, Rafael, 2022, On two new species of the genus Ctenolepisma (Zygentoma: Lepismatidae) from India, Zootaxa 5222 (1), pp. 59-68 : 67-68

Identification key to Ctenolepisma s. str. species from India

- Urotergite VI with 2+2 bristle-combs..................................................................... 3

3. Urotergite X without well-defined bristle-combs........................................ Ctenolepisma (C.) nigrum

- Urotergite X with 1+1 bristle-combs............................................... Ctenolepisma (Ct.) tripurense

4. Prosternum with only 1+1 small bristle-combs consisting in a row of 3‒4 macrosetae. Ovipositor with fewer than 30 divisions.................................................................... Ctenolepisma (C.) udumalpetense sp. n.

- Prosternum with at least 2+2 bristle-combs, frequently with more than 5 macrosetae each. Ovipositor with more than 35 divisions............................................................................................ 5

5. Epidermic pigment absent or yellowish. Caudal filaments and antennae as long as or longer than body length. Lateral margins of prosternum convex...................................................... Ctenolepisma (C.) longicaudatum

- Epidermic pigment intense, especially in appendages, usually purplish brown. Caudal filaments shorter than body length, antennae at most as long as body. Lateral margins of prosternum straight.................... Ctenolepisma (C.) ciliatum

6. Infralateral combs of urotergites broad, composed of about 15 macrosetae. Apex of the ovipositor acute. Adult specimens reaching 15 mm in length......................................................... Ctenolepisma (C.) alticola

- Infralateral combs of urotergites smaller, with 3‒8 macrosetae.Apex of the ovipositor rounded. Adult specimens smaller, length upto 9 mm .......................................................................................... 7

7. Labial palp bearing three sensory papillae. Ovipositor with 70 divisions............... Ctenolepisma (C.) boettgerianum

- Labial palp bears nine sensory papillae. Ovipositor with 54‒56 divisions......... Ctenolepisma (C.) venkataramani sp. n.