Desmodus draculae

Desmodus draculae
Temporal range: Pleistocene (Uquian-Lujanian)-Holocene
~2.5–0.01 Ma
↓
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Mammalia
Order:Chiroptera
Family:Phyllostomidae
Genus:Desmodus
Species: †D. draculae
Binomial name
Desmodus draculae
Morgan et al. 1988

Desmodus draculae is an extinct species of vampire bat that inhabited Central and South America during the Pleistocene, and possibly the early Holocene. It was 30% larger than the extant common vampire bat. The species has been occasionally called the giant vampire bat in reference to its size. Fossils and unmineralized subfossils have been found in Argentina, Mexico, Ecuador, Brazil, Venezuela, Belize, and Bolivia.[1][2]

Most records of D. draculae are from the late Pleistocene, but some are from the Holocene. The youngest fossil of this species, a single canine tooth which was radiometrically dated at 3,000 years old, was found in Argentina.[3]

Taxonomy and etymology

The first D. draculae fossil was located in Cueva del Guácharo in Venezuela in 1965 by Omar J. Linares. It wasn't described as a new species until 1988, however. The authors gave it the species name draculae, saying, "the specific epithet of this largest known chiropteran vampire commemorates Count Dracula, the greatest human vampire of folklore."[4]

Description

It is the largest-known vampire bat to have ever lived. The length of its skull was 31.2 mm (1.23 in), and its humerus length was approximately 51 mm (2.0 in), as compared to the extant common vampire bat at 32.4–42.4 mm (1.28–1.67 in). Its skull was long and narrow, and its face had an upturned snout.[4] Based on its skull dimensions, it may have had a wingspan of approximately 50 cm (20 in) and a body mass of 60 g (2.1 oz).[5] Its braincase was 14.5–14.8 mm (0.57–0.58 in) wide and 13.4–14.8 mm (0.53–0.58 in) high.[6]

Biology

Some researchers believe that D. draculae would have preyed on megafauna,[7] while others believe that they would have preyed on Caviomorpha.[8] Other potential prey items that would have been available to D. draculae include Plains viscacha, deer, and Camelids.[3]

Range and habitat

Fossils of D. draculae have been found in Mexico, Belize, Venezuela, Brazil, and Argentina, in six caves total.[2] The discovery of a vampire bat fossil in Argentina also represents the southernmost point that they have been recorded by 600 km (370 mi), possibly indicating that this region was at least 2 °C (3.6 °F) warmer during this time.[3] Though there are no fossils to corroborate this, it is believed that its range might have included Ecuador, French Guiana, Guyana, and Ecuador.[1] The species was likely widely distributed throughout South America.[7]

Current status

It is accepted as extinct, as only bones of it have been documented. However, its extinction is assumed to be relatively recent, as some of its remains discovered were not yet fossilized. The date and reason for its extinction are currently unknown.[1] One hypothesis for its extinction states that it was that it was highly specialized on megafauna mammals as prey; when they went extinct in the Quaternary extinction event, D. draculae was unable to switch to smaller prey. However, there are rumors of "large bats attacking cattle and horses" in Brazil. These accounts are likely exaggerations based on the activities of the three vampire bat species accepted as currently extant, though.[7]

In culture

It has been speculated that D. draculae was part of the inspiration for the Mayan bat-god Camazotz. D. draculae could have also inspired legends of the Mura people, an indigenous people in Brazil, about the Caoera—a blood-eating bat the size of a vulture.[9]

References

  1. 1 2 3 Turvey, S. (2008). "Desmodus draculae (Giant Vampire Bat)". IUCN Red List of Threatened Species. doi:10.2305/IUCN.UK.2008.RLTS.T136451A4293610.en.
  2. 1 2 Czaplewski, N. J.; Krejca, J.; Miller, T. E. (2003). "Late quaternary bats from Cebada Cave, Chiquibul cave system, Belize". Caribbean Journal of Science. 39 (1): 23–33.
  3. 1 2 3 Pardiñas, U. F. J.; Tonni, E. P. (2000). "A giant vampire (Mammalia, Chiroptera) in the Late Holocene from the Argentinean pampas: paleoenvironmental significance". Palaeogeography, Palaeoclimatology, Palaeoecology. 160 (3): 213–221. Bibcode:2000PPP...160..213P. doi:10.1016/s0031-0182(00)00067-5.
  4. 1 2 Morgan, G. S.; Linares, O. J.; Ray, C. E. (1988). "New species of fossil vampire bats (Mammalia, Chiroptera, Desmodontidae) from Florida and Venezuela". Proceedings of the Biological Society of Washington. 101 (4): 912–928.
  5. ↑ Naish, Darren (July 14, 2013). "What did giant extinct vampire bats eat?". ScientificAmerican.com. Scientific American, a Division of Nature America, Inc. Retrieved November 18, 2017.
  6. ↑ Suárez, W. (2005). "Taxonomic status of the cuban vampire bat (Chiroptera: Phyllostomidae: Desmodontinae: Desmodus)" (PDF). Caribbean Journal of Science. 41 (4): 761–767.
  7. 1 2 3 Trajano, E.; De Vivo, M. (1991). "Desmodus draculae Morgan, Linares, and Ray, 1988, reported for southeastern Brasil, with paleoecological comments (Phyllostomidae, Desmodontinae)". Mammalia. 55 (3): 456–459. doi:10.1515/mamm.1991.55.3.433.
  8. ↑ Crespo, J. A., Vanella, J. M., Blood, B. D., & De Carlo, J. M. (1961). Observaciones ecológicas del vampiro Desmodus r. rotundus (Geoffroy) en el norte de Córdoba. Revista del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigaciones de las Ciencias Naturales, Buenos Aires, 4, 131-160.
  9. ↑ Naish, Darren (February 12, 2007). "Camazotz and the age of vampires". Scienceblogs.com. ScienceBlogs, LLC. Retrieved November 18, 2017.
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