Published September 19, 2025
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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
Creators
- 1. Department of Zoology, St. Thomas College (Autonomous), Thrissur affiliated to the University of Calicut, Malappuram 673635, Kerala (India)
- 2. Departamento de Zoología, University of Córdoba, Campus de Rabanales, 14071 Córdoba (Spain)
- 3. Australian Museum Research Institute, Australian Museum, 1 William Street Darlinghurst, NSW, 2010, Sydney (Australia
- 4. Department of Zoology, St. Thomas College (Autonomous), Thrissur - 1 affiliated to the University of Calicut, Malappuram 673635, Kerala (India)
Description
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 |
Notes
Published as part of Rafael, Sheeba Raphel, Andrew, Rafael Molero-Baltanás, Joyce, Andrew Mitchell & Jose, Joyce, 2025, 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, pp. 440 in Zoosystema 47 (21) on page 440, DOI: 10.5252/zoosystema2025v47a21, http://zenodo.org/record/17178484
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Additional details
Identifiers
References
- RITTER W. 1910. - Neue Thysanuren und Collembolen aus Ceylon und Bombay, gesammelt von Dr. Uzel. Annalen des Naturhistorisches Hofmuseum 24: 379-398. https://www.jstor.org/stable/41768082
- MOLERO-BALTANAS R., MITCHELL A., GAJU-RICART M. & ROBLA J. 2024 a. - Worldwide revision of synanthropic silverfish (Insecta: Zygentoma: Lepismatidae) combining morphological and molecular data. Journal of Insect Science 24 (3). https://doi.org/10.1093/jisesa/ieae045