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).

Character	In Kerala species	In European Species	In Ritter’s description
Relative length of antennae to body*	Body longer than antennae	Body longer than antennae	Antennae almost as long as body
Relative length of caudal filaments to antennae*	Antennae slight longer than caudal filaments	Antennae slight longer than caudal filaments	Caudal appendages slightly longer than antennae
Relative length of ovipositor to abdomen and styli	Ovipositor 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 9	Short, ovipositor length less than ¼ th of abdomen, not exceeding or barely exceeding the apex of styli of segment 9	Long; ¼ th the length of abdomen
Number of segments in ovipositor	30-33	19-21	More than 35 as in diagram, not mentioned in text
Bristles of tergites	Well developed, but less than other Ctenolepisma Escherich, 1905	Well developed, but less than other Ctenolepisma	Rudimentary (probably overlooked by Ritter)
Shape of Urotergite X Number of Styli	Trapezoidal wider than long Two pairs	Trapezoidal wider than long One pair	Trapezoidal wider than long Two pairs