Abstract
A single elmid larva reported from a laminate maroon shale bed of Gurha opencast lignite mine (Palana Formation, early Eocene, Bikaner District, north-western Rajasthan, India: Kumar et al., 2016) is the first preimaginal fossil known up to date. It was thoroughly examined and published by Kirejtshuk et al. (2023). However, because of the absence of any unambiguous diagnostic character for a strict generic attribution of this fossil, its rather described larva remained unnamed. Taking into consideration the scientific importance of this fact for different aspects of our knowledge it is rather advisable to introduce the description of this specimen to scientific community with a concrete specific name and probable generic attribution.
References
- Bertrand, H. (1972) Larves et nymphes des Coléoptères aquatiques du globe. F. Paillart, Paris, Abbeville, 804 pp.
- Champion, G.C. (1923) Some Indian Coleoptera (11). The Entomologist’s Monthly Magazine, 59, 165–179.
- Delescluse, M. & Chamot-Rooke, N. (2007) Instantaneous deformation and kinematics of the India–Australia Plate. Geophysical Journal International, 168 (2), 818–842. https://doi.org/10.1111/j.1365-246X.2006.03181.x
- Delescluse, M., Chamot-Rooke, N., Cattin, R., Fleitout, L., Trubienko, O. & Vigny, C. (2012) Intra-oceanic seismicity off Sumatra boosted by the Banda-Aceh megathrust. Nature, 490 (7419), 240–244. https://doi.org/10.1038/nature11520
- Glaister, A. (1999) A guide to the identification of Australian Elmidae larvae (Insecta: Coleoptera). Cooperative Research Centre for Freshwater Ecology, Albury, New South Wales, Alena Glaister Identification Guide No. 21, pp. 1–49.
- Hayashi, M. & Kamite, Y. (2023) An explanation on the immature stages of Elmidae of Japan. Special Bulletin Hoshizaki Green Foundation, 32, 13–43.
- Jäch, M.A., Kodada, J., Brojer, M., Shepard, W.D. & Čiampor, F. (2016) Coleoptera: Elmidae and Protelmidae. World catalogue of insects. Vol. 14. Brill, Leiden, xxi + 318 pp. https://doi.org/10.1163/9789004291775
- Kirejtshuk, A.G., Patel, R., Rana, R.S., Prokin, A., Nel, A. & Jäch, M.A. (2023) Discovery of the oldest known elmid larva (Coleoptera, Elmidae) from the Lower Eocene of Rajasthan (India, Palana Formation). Palaeoentomology, 6 (3), 235–241. https://doi.org/10.11646/palaeoentomology.6.3.5
- Kumar, M., Spicer, R.A., Spicer, T.E.V., Shukla, A., Mehrotra, R.C. & Monga, P. (2016) Palynostratigraphy and palynofacies of the early Eocene Gurha lignite mine, Rajasthan, India. Palaeogeography, Palaeoclimatology, Palaeoecology, 461, 98–108. https://doi.org/10.1016/j.palaeo.2016.08.013
- Nel, A. & Paicheler, J.-C. (1993) Les Isoptera fossiles. État actuel des connaissances, implications paléoécologiques et paléoclimatologiques. (Insecta, Dictyoptera). Cahiers de Paléontologie, CNRS Éditions, Paris, pp. 102–179.
- Quigley, M.C., Clark, D. & Sandiford, M. (2010) Tectonic geomorphology of Australia. Geological Society, London, Special Publications, 346, 243–265. https://doi.org/10.1144/SP346.13
- Reitter, E. (1887) Neue Coleopteren aus Europa, den angrenzenden Ländern und Sibirien, mit Bemerkungen über bekannte Arten. 3. Teil. Deutsche Entomologische Zeitschrift, 31, 497–528. https://doi.org/10.1002/mmnd.48018870216
- Segura, M.O., Valente-Neto, F. & Fonseca-Gessner, A.A. (2011) Elmidae (Coleoptera, Byrrhoidea) larvae in the state of São Paulo, Brazil: Identification key, new records and distribution. ZooKeys, 151, 53–74. https://doi.org/10.3897/zookeys.151.1879