Bighead spurdog vs Coiban Mastuff Bat

Squalus bucephalus compared with Molossus coibensis

Key Differences

• Bighead spurdog is Data Deficient while Coiban Mastuff Bat is Least Concern.

Taxonomic Classification

Rank	Bighead spurdog	Coiban Mastuff Bat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Squaliformes (Squaliformes)	Chiroptera (Bats)
Family	Squalidae	Molossidae
Genus	Squalus	Molossus
Species	Squalus bucephalus	Molossus coibensis

Evolutionary Relationship

Bighead spurdog and Coiban Mastuff Bat share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bighead spurdog

DD — Data Deficient

Coiban Mastuff Bat

LC — Least Concern

Physical Characteristics

Attribute	Bighead spurdog	Coiban Mastuff Bat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bighead spurdog

Coiban Mastuff Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

Bighead spurdog

The Bighead spurdog (Squalus bucephalus) is a species in the genus Squalus.

Coiban Mastuff Bat

The Coiban Mastuff Bat (Molossus coibensis) is a small free-tailed bat in the family Molossidae, named for Coiba Island off the Pacific coast of Panama, where specimens were first collected. Members of the genus Molossus are robust, fast-flying insectivores adapted to open-air foraging above the forest canopy and over water, characterised by narrow wings and a tail that extends beyond the patagium (wing membrane). Molossus coibensis inhabits lowland tropical forests and adjacent open habitats in Central America and northwestern South America, with confirmed records from Colombia, Ecuador, Venezuela, and Panama, indicating a distributional range that extends well beyond its type locality on Coiba Island. Like other mastiff bats, it roosts in crevices within buildings, rock faces, and hollow trees, emerging at dusk to pursue aerial insects at speed. The species feeds primarily on large beetles, moths, and other night-flying insects, typically hunted high above the forest. It is assessed as Least Concern by the IUCN based on its relatively wide range and tolerance of modified habitats. Molossus coibensis was long treated as a subspecies of Molossus molossus before being recognised as a distinct species based on morphological and molecular evidence. Ecological and life-history data specific to this taxon remain limited.