Observations on the dental morphology of the North African Sandfish Scincus scincus (Squamata: Scincidae)

Authors

  • Shreya Bhattacharya Institute of Biodiversity and Environmental Conservation Universiti Malaysia Sarawak 94300 Kota Samarahan, Sarawak, Malaysia. https://orcid.org/0009-0003-1931-9409
  • Indraneil Das Institute of Biodiversity and Environmental Conservation Universiti Malaysia Sarawak 94300 Kota Samarahan, Sarawak, Malaysia. https://orcid.org/0000-0001-9522-2228

DOI:

https://doi.org/10.11609/jott.10287.18.9.29772-29775

Keywords:

Cranial elements, dentition, feeding ecology, generalize functional, sandfish skink, scanning electron microscopy, structural features of teeth

Abstract

The dental morphology of the North African Sandfish Lizard Scincus scincus (Linnaeus, 1858) was studied using field emission scanning electron microscopy. The primary aim of the study was to observe structural features of teeth in the species and generalize functional adaptations with respect to its feeding ecology. Specimens were euthanized, decapitated, the cranial removed and tissues macerated, using standard protocols. Cranial elements, including maxillary and mandibular elements were prepared separately using an ethanol series, critically point-dried, and examined under an electron microscope. S. scincus exhibits monostichous, bicuspid, sub-equal, sub-conical, posteriorly-oriented mandibular, and maxillary teeth rows comprising of faint ridges. The dentition appeared to mirror a predator of arthropods, as in a majority of members of the lineage, in addition to adaptations for larger prey, such as small vertebrates.

References

Al-Johany, A.M.H. et al. (2021). Scincus scincus. The IUCN Red List of Threatened Species 2021: e.T164624A1062266. https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T164624A1062266.en. Accessed on 01.08.2026.

Attum, O. et al. (2004). The comparative diet of three Saharan sand dune skinks. African Journal of Herpetology 53(1): 91–94. https://doi.org/10.1080/21564574.2004.9635501

Attum, O. et al. (2006). Morphology, niche segregation, and escape tactics in a sand dune lizard community. Journal of Arid Environments 68(4): 564–573. https://doi.org/10.1016/j.jaridenv.2006.07.010

Bhattacharya, S. & I. Das (2026). Comparative dental morphology in sympatric Bornean Eutropis (Squamata: Sauria: Scincidae). Journal of Natural History 60(13–16): 809–822. https://doi.org/10.1080/00222933.2026.2642869

Caputo, V. (2004). The cranial osteology and dentition in the scincid lizards of the genus Chalcides (Reptilia, Scincidae). Italian Journal of Zoology 71(Sup. 2): 35–45. https://doi.org/10.1080/11250000409356604

Čerňanský, A. et al. (2019). The key to understanding the European Miocene Chalcides (Squamata, Scincidae) comes from Asia: the lizards of the East Siberian Tagay locality (Baikal Lake) in Russia. The Anatomical Record 303(7): 1901–1934. https://doi.org/10.1002/ar.24289

Christensen, K. & K.M. Melstrom (2021). Quantitative analyses of squamate dentition demonstrate novel morphological patterns. PLoS One 16(9): e0257427. https://doi.org/10.1371/journal.pone.0257427

Das, I. & M. Coe (1994). Dental morphology and diet in anuran amphibians from south India. Journal of Zoology 233(3): 417–427. https://doi.org/10.1111/j.1469-7998.1994.tb05274.x

Delgado, S. et al. (2003). Dentition and tooth replacement pattern in Chalcides (Squamata; Scincidae). Journal of Morphology 256(2): 146–159. https://doi.org/10.1002/jmor.10080

Greer, A.E. (2007). The Biology of scincid lizards. Unpublished manuscript online. https://www.academia.edu/35305801/The_Biology_and_Evolution_of_Scincid_Lizard s_doc

Hetherington, T.E. (1992). Behavioural use of seismic cues by the sand swimming lizard Scincus scincus. Ethology Ecology & Evolution 4(1): 5–14. https://doi.org/10.1080/08927014.1992.9525346

Kosma, R. (2004). The dentition of recent and fossil scincomorphan lizards (Lacertilia, Squamata) – systematics, functional morphology, palecology. Unpublished doctoral dissertation, University of Braunschweig, Braunschweig, Germany 187pp+36 pl and captions.

Melstrom, K.M. (2017). The relationship between diet and tooth complexity in living dentigerous saurians. Journal of Morphology 278(4): 500–522. https://doi.org/10.1002/jmor.20645

Melville, J. & R.O.Y. Swain (2000). Evolutionary relationships between morphology, performance and habitat openness in the lizard genus Niveoscincus (Scincidae: Lygosominae). Biological Journal of the Linnean Society 70(4): 667–683. https://doi.org/10.1006/bijl.1999.0422

Razmadze, D. et al. (2024). Squamates as a model to understand key dental features of vertebrates. Developmental Biology 516: 1–19. https://doi.org/10.1016/j.ydbio.2024.07.011

Salem, S. et al. (2017). Comparative histological characterization of the tongue in two reptiles, Scincus scincus (Scincidae) and Uromastyx ornata (Agamidae) in relation to diet. The Egyptian Journal of Experimental Biology (Zoology) 13(2): 319–327. https://doi.org/10.5455/egysebz.20171214034607

Schleich, H. et al. (1996). Amphibians and reptiles of North Africa: Biology, systematics, field guide. S. Koeltz Verlag, Koenigstein, 630 pp.

Šmíd, J. et al. (2021). Swimming through the sands of the Sahara and Arabian deserts: Phylogeny of sandfish skinks (Scincidae, Scincus) reveals a recent and rapid diversification. Molecular Phylogenetics and Evolution 155: 107012. https://doi.org/10.1016/j.ympev.2020.107012

Stadler, A.T. et al. (2016). Adaptation to life in aeolian sand: how the sandfish lizard, Scincus scincus, prevents sand particles from entering its lungs. Journal of Experimental Biology 219(22): 3597–3604. https://doi.org/10.1242/jeb.138107

Townsend, V.R. et al. (1999). Dentition of the Ground Skink, Scincella lateralis (Sauria, Scincidae). Copeia 1999(3): 783–788. https://doi.org/10.2307/1447615

Uetz, P. et al. (2026). The Reptile Database. http://www.reptile-database.org. Accessed 1 August 2026.

Downloads

Published

26-09-2026

Issue

Section

Short Communications

Most read articles by the same author(s)