Yellow-headed Blind-Snake (Anomalepis flavapices)

Reptiles of Ecuador | Serpentes | Anomalepididae | Anomalepis flavapices

English common names: Yellow-headed Blind-Snake, Ecuador Blind-Snake.

Spanish common names: Culebra ciega cabeciamarilla, serpiente ciega delgada.

Recognition: 14.6 cm.^1,2 Anomalepis flavapices is a dwarf, archaic-looking fossorial snake characterized by rudimentary, vestigial eyes concealed beneath a scale, and by possessing ventral scales that are similar in size to the dorsal scales.^1,3 This species is readily distinguished from all other blind snakes in western Ecuador by its unique cephalic lepidosis: it features a pair of polygonal prefrontal scales in contact behind the rostral, followed by a large pentagonal frontal scale.³ Unlike the sympatric and far more common Epictia subcrotilla, A. flavapices lacks distinct yellow patches on the head and tail-tip.² The dorsal coloration is a uniform dark brown that contrasts sharply with a lighter brown venter, and the head and tail-tip are conspicuously marked in a contrasting whitish-cream coloration (Fig. 1).²

Figure 1: Illustration of an adult individual of Anomalepis flavapices based on photographs of the holotype.

Natural history: Anomalepis flavapices is an exceptionally rare, cryptic fossorial snake that utilizes both humid lowland rainforests and seasonally dry forest ecosystems.^1,2 While microhabitat data remains scant due to the species’ extreme rarity, a single individual was historically documented active on the surface soil and leaf-litter layer during the daytime within a well-preserved tract of seasonally dry forest.⁴ Broadly speaking, the ecology of this species is inferred from its congeners within the genus Anomalepis, which are specialized burrowers typically recovered buried deep within loose, friable soils, deep leaf-litter matrices, or hidden beneath decaying logs and fallen timber.⁵ They exhibit an oviparous reproductive strategy and are highly specialized insectivores, preying predominantly upon soil-dwelling invertebrates, including the larvae, pupae, and adults of ants and termites.^6,7

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Conservation: Data Deficient There is inadequate information to make an assessment of extinction risk..⁸ Anomalepis flavapices is maintained in this category because current distributional and ecological data are insufficient to accurately assess its extinction risk. The species is historically documented from only three disjointed localities across areas with markedly different rainfall regimes, hinting that this cryptic snake may possess a wider, overlooked distribution. Following more than a century of intensive herpetological exploration in the Esmeraldas and Manabí provinces, this reptile was widely considered “lost” since its last sighting in 1907. However, it was successfully rediscovered in December 2024 by Gabriel Basantes at Cerro Montecristi.⁴ A primary driver for its prolonged disappearance may be the severe fragmentation of its historical range: the continuous forest cover linking its known collection sites has been almost entirely destroyed, leaving vital refugia restricted to a few isolated fragments like Cerro Montecristi and the Mache-Chindul Ecological Reserve.

Distribution: Anomalepis flavapices is endemic to the Pacific lowlands of western Ecuador. To date, this highly localized species is documented from only three specific localities: the coastal city of Esmeraldas and two isolated, forested hills rising within the arid lowlands surrounding the city of Montecristi—namely, Cerro Jaboncillo and Cerro Montecristi (Fig. 2).

Figure 2: Distribution of Anomalepis flavapices in Ecuador. See Appendix 1 for a complete list of the presence localities included in the map.

Etymology: The generic name Anomalepis is derived from the Greek words anomalos (=abnormal) and lepis (=scale).⁹ This refers to the unusual head scales. The specific epithet flavapices is derived from the Latin flavus (=yellow) and apices (=tips), and refers to the yellow head and tail-tip.²

Where to observe: The long-awaited rediscovery of Anomalepis flavapices at Cerro Montecristi officially confirms that this elusive blind snake is not extinct. However, it remains extraordinarily rare in the wild. Given its highly specialized fossorial lifestyle, field encounters may occur once every century, as individuals are likely entirely restricted to underground burrow networks deep within the few remaining, isolated forest patches of the Manabí province.

Author: Alejandro Arteaga^aAffiliation: Fundación Khamai, Reserva Arlequín, Ecoruta Paseo del Quinde km 56, Santa Rosa de Mindo, Pichincha 171202, Ecuador.

Illustrator: Valentina Nieto Fernández

How to cite? Arteaga A (2026) Yellow-headed Blind-Snake (Anomalepis flavapices). In: Arteaga A, Bustamante L, Vieira J (Eds) Reptiles of Ecuador: Life in the middle of the world. Available from: www.reptilesofecuador.com. DOI: 10.47051/ZSJF1865

Literature cited:

Kofron C (1988) The central and south-american blindsnakes of the genus Anomalepis. Amphibia-Reptilia 9: 7–14.
Peters JA (1957) Taxonomic notes on Ecuadorian snakes in the American Museum of Natural History. American Museum Novitates 1851: 1–13.
Peters JA, Orejas-Miranda B (1970) Catalogue of Neotropical Squamata: part I, snakes. Bulletin of the United States National Museum, Washington, D.C., 347 pp.
Photographic record by Stephen Gabriel Basantes Gómez.
Lamar Stickel A, Abarca JG, Pounds JA (2017) Anomalepis mexicanus (Mexican Blind Snake): geographic distribution. Herpetological Review 48: 589.
Leenders T (2019) Reptiles of Costa Rica: a field guide. Cornell University Press, Ithaca, 625 pp.
Savage JM (2002) The amphibians and reptiles of Costa Rica, a herpetofauna between two continents, between two seas. The University of Chicago Press, Chicago, 934 pp.
Cisneros-Heredia DF (2016) Anomalepis flavapices. The IUCN Red List of threatened species. Available from: www.iucnredlist.org. DOI: 10.2305/IUCN.UK.2016-1.RLTS.T203192A2761868.en
Brown RW (1956) Composition of scientific words. Smithsonian Books, Washington D.C., 882 pp.

Appendix 1: Locality data used to create the distribution map of Anomalepis flavapices in Ecuador (Fig. 2).

Country	Province	Locality	Source
Ecuador	Esmeraldas	Esmeraldas*	Peters 1957
Ecuador	Manabí	Cerro Jaboncillo	Peters 1957
Ecuador	Manabí	Cerro Montecristi	Photo by Stephen Gabriel Basantes Gómez