TABLE 4 in Rediscovery of synanthropic silverfish Ctenolepisma calvum (Ritter, 1910) (Insecta: Zygentoma: Lepismatidae: Ctenolepismatinae) from Kerala, India and assignation of European C. calvum to a new species

TABLE 4. — Comparison of significant similarities and differences between Ctenolepisma calvum (Ritter, 1910) in Kerala, C. phantasma Molero-Baltanás, Raphel, Mitchell & Jose, n. sp. in Europe and Ritter’s description. Measures marked with * should be considered with caution, since these appendages can be broken in their apical part in several specimens. For example, although in C. phantasma Molero-Baltanás, Raphel, Mitchell & Jose, n. sp. the antennae are slightly longer than paracercus when intact,in some specimens antennae are broken and can be slightly shorter,as happens in the specimens photographed in Molero-Baltanás et al. (2024a; Fig. 19A). CharacterIn Kerala speciesIn European SpeciesIn Ritter’s descriptionRelative length of antennae to body*Body longer than antennaeBody longer than antennaeAntennae almost as long as bodyRelative length of caudal filaments to antennae*Antennae slight longer than caudal filamentsAntennae slight longer than caudal filamentsCaudal appendages slightly longer than antennaeRelative length of ovipositor to abdomen and styliOvipositor long; more than ¼ th the length of abdomen but less than half the length of abdomen, clearly surpassing the apex of styli of segment 9Short, ovipositor length less than ¼ th of abdomen, not exceeding or barely exceeding the apex of styli of segment 9Long; ¼ th the length of abdomenNumber of segments in ovipositor30-3319-21More than 35 as in diagram, not mentioned in textBristles of tergitesWell developed, but less than other Ctenolepisma Escherich, 1905Well developed, but less than other CtenolepismaRudimentary (probably overlooked by Ritter)Shape of Urotergite X Number of StyliTrapezoidal wider than long Two pairsTrapezoidal wider than long One pairTrapezoidal wider than long Two pairs