Eumops delticus, Thomas, 1923

Don E. Wilson & Russell A. Mittermeier, 2019, Molossidae, Handbook of the Mammals of the World – Volume 9 Bats, Barcelona: Lynx Edicions, pp. 598-672 : 631

30.

Delta Bonneted Bat

Eumops delticus

French: Eumope du delta / German: Delta-Bulldogfledermaus / Spanish: Eumops del delta

Other common names: Marajo Island Bonneted Bat

Taxonomy. Eumops delticus Thomas, 1923 ,

“Caldeirao,” Ilha Marajo, Para, Brazil.

Eumops delticus was previously considered a subspecies of E. bonariensis but separated based on morphological differences and allopatry. Monotypic.

Distribution. Known from scattered localities in S Colombia (Caqueta Department), NE Peru (Loreto Department), and N & E Brazil (Amapa, Para, Bahia, and Minas Gerais states).

Descriptive notes. Head-body 65-72 mm, tail 34-45 mm, ear 19-22 mm, hindfoot 9-10 mm, forearm 45-48 mm; weight 15 g (one specimen). See general characteristics of the genus under the Black Bonneted Bat ( LE. auripendulus ). Pelage of the Delta Bonneted Bat is dark brown on back and paler on venter. Compared with the Common Dwarf Bonneted Bat ( FE. bonariensis ), it has shorter, narrower skull; longer ears; and larger basisphenoid pits.

Habitat. Lowland Amazonian rainforests and savannas and near human habitation.

Food and Feeding. The Delta Bonneted Bat is an aerial insectivore.

Breeding. A pregnant Delta Bonneted Bat was documented in October in north-eastern Peru.

Activity patterns. No information.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Data Deficient on The IUCN Red Lust.

Bibliography. Diaz (2011), Eger (1977, 2008), Silva et al. (2013).

Figures

22. Big Crested Mastiff Bat (Promops centralis), 23. Davison’s Mastiff Bat (Promops davisoni), 24. Brown Mastiff Bat (Promops nasutus), 25. Black Bonneted Bat (Eumops auripendulus), 26. Common Dwarf Bonneted Bat (Eumops bonariensis), 27. Chimera’s Bonneted Bat (Fumops chimaera), 28. Chiribaya’s Bonneted Bat (Eumops chiribaya), 29. Big Bonneted Bat (Eumops dabbener), 30. Delta Bonneted Bat (Eumops delticus), 31. Fierce Bonneted Bat (Fumops ferox), 32. Florida Bonneted Bat (FEumops floridanus), 33. Wagner's Bonneted Bat (Fumops glaucinus), 34. Sanborn’s Bonneted Bat (Eumops hansae), 35. Guianan Bonneted Bat (Eumops maurus), 36. Northern Dwarf Bonneted Bat (Fumops nanus), 37. Patagonian Dwarf Bonneted Bat (Eumops patagonicus), 38. Western Bonneted Bat (Eumops perotis), 39. Trumbull’s Bonneted Bat (Eumops trumbulli), 40. Underwood’s Bonneted Bat (Eumops underwoodi), 41. Wilson’s Bonneted Bat (Eumops wilsoni)

Distribution. Known from scattered localities in S Colombia (Caqueta Department), NE Peru (Loreto Department), and N & E Brazil (Amapa, Para, Bahia, and Minas Gerais states).