Mammals of the Caribbean

A unique and diverse albeit phylogenetically restricted mammal fauna[note 1] is known from the Caribbean region. The region—specifically, all islands in the Caribbean Sea (except for small islets close to the continental mainland) and the Bahamas, Turks and Caicos Islands, and Barbados, which are not in the Caribbean Sea but biogeographically belong to the same Caribbean bioregion—has been home to several families found nowhere else, but much of this diversity is now extinct.

The bat faunas of much of the Caribbean show similarities that led to the proposal of a distinct Caribbean faunal region, bounded by "Koopman's Line". This region excludes several of the region's islands, including the Grenadines, Grenada, Trinidad, Tobago, and other islands near the American mainland, such as Margarita, Isla Escudo de Veraguas, Rosario Islands, Cozumel, and the Florida Keys.[1] The faunas of islands outside Koopman's Line are similar to those of the adjacent mainland, though usually smaller; in contrast, the region inside Koopman's Line harbors relatively few species shared with the mainland and many of its species belong to endemic genera, subfamilies, and even families.

Excluding bats, nearly 90% of the mammals of the Caribbean faunal region have gone extinct since the late Pleistocene,[2] including all the sloths and monkeys, the unique insectivore Nesophontes, two of four species of solenodon, and a variety of rodents including all giant hutias, leaving only a few hutia species extant.[3] Most of these species (the sloths, monkeys, and caviomorph rodents) were of South American origin. The oryzomyine rodents were of ultimately of Nearctic origin, but except for those on Jamaica would also have reached the Caribbean via South America. The origin(s) of the Caribbean eulipotyphlans are uncertain.[4]

Non-flying mammals of Cenozoic origin must have colonized the Caribbean islands by some combination of rafting and/or use of a "land span" (a temporary land bridge connecting South America with one or more off-shelf islands).[5][6][7] Colonization of a series of islands can occur either by an iterative rafting process ("island-hopping"), or by colonization of a large ancestral island which is then subdivided by into smaller islands by subsequent geologic or sea level changes (island-island vicariance).[8] The restricted, unbalanced nature of the Caribbean mammal fauna implies that rafting was part of the overall process.[6][7] This is consistent with the fact that megalonychid sloths, platyrrhine monkeys and caviomorph rodents have all shown a capacity for this type of dispersal (in their colonization of North America from South America prior to the formation of the Isthmus of Panama in the first case, and of South America from Africa in latter two cases). These three groups are known in the Caribbean from fossils as old as the early Oligocene, early Miocene and early Miocene, respectively. Rafting is also consistent with the prevailing flow of oceanic currents from South America towards the islands.[7]

The large proportion of extinctions can be attributed to the isolated and therefore somewhat less competitive nature of the islands' ecosystems, and to the fact that carnivorans never colonized most of the region. These factors made the islands' native fauna particularly vulnerable to disruption by humans[9] and the invasive species they introduced. The large predator niches of the Caribbean islands were formerly occupied by endemic outsize hawks, falcons, caracaras, teratorns and owls, such as Titanohierax, Gigantohierax, Buteogallus borrasi, Caracara tellustris, Oscaravis olsoni, Ornimegalonyx and Tyto pollens - all of which are now extinct. Cuban crocodiles also have more terrestrial habits than other extant crocodilians.

Opossums

Opossums (order Didelphimorphia), the largest group of American marsupials,[10] are of limited diversity in the Caribbean. The large opossum Didelphis marsupialis is found on Trinidad and Tobago[11] and in the Windward Islands up to Dominica, being found on Martinique, Saint Lucia, Saint Vincent, Grenada, and the Grenadines of Carriacou, Mustique, and Bequia.[12] At least some of the latter populations may have been introduced by humans.[13] In Central America, it is also found on the islands of Cozumel, Mexico, and Roatán, Honduras.[14] The smaller Marmosa robinsoni is also known from Trinidad, Tobago, Grenada, and Roatán, but the classification of Central American populations of this species is unclear.[15] In addition, Marmosa murina is known from Trinidad and Tobago,[16] Marmosops fuscatus[17] and Chironectes minimus[18] from Trinidad only, and Caluromys philander from Trinidad and the Venezuelan island of Margarita.[19] A related species, Caluromys derbianus, is known from the small Panamanian island of Escudo de Veraguas.[20]

Armadillos

Armadillos (order Cingulata) include about 20 species, mostly in South America.[21] One species, the nine-banded armadillo (Dasypus novemcinctus) is known from Trinidad, Tobago, and Grenada.[22] An unspecified fossil armadillo has been recorded from Bonaire in the ABC Islands.[23]

Pilosans

The order Pilosa includes the sloths and anteaters, about ten species of which survive in Central and South America.[24] Until the middle Holocene, the Greater Antilles and surrounding islands were home to at least as many species of sloths in four or more genera.[25] All of those are now extinct, with many last appearance dates coinciding roughly with the first arrival of humans.[26] The extinct Caribbean sloths were generally more terrestrial than extant sloths, although not exclusively so.[27] Some other pilosans are still found on islands along the margin of the Caribbean.[28]

Eulipotyphlans

The order Eulipotyphla includes the hedgehogs, gymnures, shrews, moles and desmans, as well as two families known only from the Greater Antilles and surrounding islands.[29] One of the latter, that of the solenodons, includes four known species, two of which are extinct and one of which are endangered, found on Cuba and Hispaniola.[30] Solenodons are only distantly related to other extant eulipotyphlans and may have split from them in the Cretaceous.[31] They are not particularly closely related to the other Caribbean eulipotyphlan family, Nesophontidae; the two groups diverged more than 40 million years ago.[32] The latter family includes about ten species, all extinct, from Cuba, Hispaniola, Puerto Rico and nearby islands, and the Cayman Islands. Several are known to have survived into the last millennium; some species' remains have been found with rat remains, suggesting they survived until European colonization, but their exact extinction dates are unknown.[33]

Bats

Bats (order Chiroptera) are diverse in the Caribbean, with over 60 species known from Trinidad alone. Six families—Phyllostomidae, Vespertilionidae, Molossidae, Natalidae, Mormoopidae, and Noctilionidae—are widespread in the Caribbean and three others—Furipteridae, Thyropteridae, and Emballonuridae—are restricted to islands close to the South and Central American mainland.[34] The family Natalidae, which is most diverse in the Antilles, may have originated in the area and is perhaps the oldest bat lineage of the Caribbean.[35] Some diverse clades in the phyllostomid subfamilies Glossophaginae and Stenodermatinae may also be Antillean in origin.[36] Although bats have not nearly been affected as much by extinctions as other Caribbean mammal lineages, about half of the Caribbean bat species have suffered either total or local extinction in recent times.[37]

Carnivorans

Carnivorans (order Carnivora) are native only to islands at the margins of the Caribbean.

On Trinidad, the tayra (Eira barbara), the neotropical otter (Lontra longicaudis), the ocelot (Leopardus pardalis), and the crab-eating raccoon (Procyon cancrivorus) have been recorded.[38]

Three carnivorans are known from the island of Cozumel off eastern Mexico, all of which are diminutive in size relative to their mainland relatives.[39] The Cozumel coati (Nasua narica nelsoni) is a subspecies of the white-nosed coati,[40] but the raccoon is still classified as a distinct species, the Cozumel raccoon (Procyon pygmaeus).[41] The Cozumel fox, related to the mainland gray fox (Urocyon cinereoargenteus), has yet to receive a scientific name.[39] The kinkajou (Potos flavus) has been recorded a few times, but may not be native to the island.[42] The greater grison (Galictis vittata) has also been recorded, but apparently in error.[43]

Populations of Procyon on New Providence in the Bahamas, Guadeloupe, and Barbados have been regarded as endemic species, but these represent introductions of the common North American raccoon (Procyon lotor). Raccoons were also once present on Cuba, Hispaniola, and Jamaica, probably after being introduced by the Taíno, but were eventually extirpated there.[44][45]

Similarly, remains of domestic dogs (Canis familiaris) on Cuba have been described as separate genera and species, Cubacyon transversidens and Indocyon caribensis.[46]

The small Indian mongoose (Urva auropunctata) has been widely introduced in the Caribbean from the 1870s onwards; it is known from Cuba, Jamaica, Hispaniola (including Gonâve), Puerto Rico (including Vieques), the U.S. Virgin Islands (Saint Thomas, Saint John, Water Island, Lovango Cay, and Saint Croix), the British Virgin Islands (Tortola and Beef Island), Saint Martin, Saint Kitts and Nevis, Antigua, Guadeloupe (La Désirade and Marie Galante), Martinique, Saint Lucia, Saint Vincent, Grenada, Barbados, and Trinidad.[47]

On Margarita Island off the coast of Venezuela, the only known carnivoran is the ocelot.

The Caribbean monk seal was once native to the Caribbean until they went extinct since the last sighting was in 1952.

Artiodactyls

Artiodactyls include deer, antelope, cattle, pigs, camels, and related species, as well as whales and dolphins.[48] A small form of the collared peccary (Dicotyles tajacu) is known from Cozumel, and it also native to Trinidad.[49] The white-lipped peccary has also been reported, but probably in error.[43] The latter has been introduced to Cuba, but is no longer extant there.[50] The red brocket, a widespread South American deer, also occurs on Trinidad and Tobago.[49] The white-tailed deer (Odocoileus virginianus) has been introduced to several localities in the Caribbean.[51][52][53]

Perissodactyls

Perissodactyls are the order of odd-toed ungulates, including horses, rhinos, tapirs and other extinct forms.[54] Fossils of Hyrachyus, a primitive perissodactyl also present in Europe and North America with affinities to early tapirs and rhinos, are known from the Eocene of Jamaica.[55] This species probably reached Jamaica on a block of Central America carried eastward by the motion of the Caribbean plate.[56]

Lagomorphs

The order Lagomorpha includes rabbits, hares, and pikas. There are few lagomorphs in the Caribbean, and they are either introduced or restricted to islands close to the mainland. The European hare (Lepus europaeus) has been introduced to Barbados.[57] A subspecies of the eastern cottontail (Sylvilagus floridanus margaritae) occurs near Venezuela on Aruba, Curaçao, Margarita, and the Islas de los Testigos.[58]

Rodents

Caribbean rodents (order Rodentia), are diverse, including several families. The fauna of the Greater Antilles mainly consists of caviomorphans, including hutias, giant hutias, and a subfamily of spiny rats (Heteropsomyinae). Of these, only some hutias survive.[59] Oryzomyines, part of a wholly distinct branch of the rodents, are known throughout the Lesser Antilles and on Jamaica, but are now also mostly extinct.[60] Various other rodents have been introduced or are known only from the fringes of the Caribbean region.

Primates

All indigenous primates (order Primates) of the Caribbean are New World monkeys (Platyrrhini), but Old World forms have been introduced. Five monkey species are known from the Greater Antilles, all extinct. They are classified together as the tribe Xenotrichini, which is related to the titis (Callicebus) of mainland South America. Three species—Xenothrix mcgregori from Jamaica, as well as Antillothrix bernensis and Insulacebus toussaintiana, both from Hispaniola — are known from the Quaternary and became extinct relatively recently (with A. bernensis lasting until the 1500s), while two Cuban species more related to the howler monkeys, Paralouatta varonai, and Paraloutta marianae are known from Domo de Zaza, an early Miocene locality on Cuba.[61] Two monkeys, Alouatta macconnelli and Cebus trinitatis, occur on Trinidad.[62] Ateles geoffroyi has been recorded from Cozumel, but probably incorrectly.[43] In the Rosario Islands there are groups of cotton-headed monkeys. Old World monkeys (Chlorocebus sabaeus and Cercopithecus mona) have been introduced to some of the Lesser Antilles.[63] Rhesus macaques (Macaca mulatta) have been introduced to a couple of islands off the coast of Puerto Rico, namely Cayo Santiago and Desecheo Island.

See also

The last survivors conservation project

Notes

  1. ^ This article covers all land mammals, including those introduced to the Caribbean, but excludes marine mammals such as whales and manatees. Some ocean mammals are covered by Cetaceans of the Caribbean

References

  1. ^ Genoways et al., 1998
  2. ^ Morgan and Woods, 1986, p. 167
  3. ^ Turvey, 2009; Woods and Kilpatrick, 2005
  4. ^ Whidden & Asher, 2001
  5. ^ White and MacPhee, 2001, p. 226
  6. ^ a b Whidden and Asher, 2001, p. 247
  7. ^ a b c Hedges, 2006
  8. ^ White and MacPhee, 2001, p. 227
  9. ^ Steadman et al., 2005, p. 11767
  10. ^ Gardner, 2005a
  11. ^ Gardner, 2007, p. 23
  12. ^ Timm and Genoways, 2003, p. 5
  13. ^ Gardner, 2007, p. 23; Timm and Genoways, 2003, p. 5
  14. ^ Koopman, 1959, p. 237
  15. ^ Solari et al., 2008; Koopman, 1959, p. 237
  16. ^ Gardner, 2007, p. 56
  17. ^ Gardner, 2007, p. 66
  18. ^ Goodwin and Greenhall, 1961, p. 201
  19. ^ Gardner, 2007, p. 11
  20. ^ Kalko and Handley, 1994, p. 270
  21. ^ Gardner, 2005b
  22. ^ Gardner, 2007, p. 134
  23. ^ De Buisonjé, 1974
  24. ^ Gardner, 2005c
  25. ^ White and MacPhee, 2001
  26. ^ Steadman et al., 2005
  27. ^ White, 1993
  28. ^ Gardner, 2005c, pp. 102–103; Koopman, 1959, p. 237
  29. ^ Hutterer, 2005
  30. ^ Ottenwalder, 2001
  31. ^ Roca et al., 2004
  32. ^ Brace et al., 2016
  33. ^ MacPhee et al., 1999
  34. ^ Simmons, 2005
  35. ^ Genoways et al., 2005, p. 137
  36. ^ Genoways et al., 2005, p. 143
  37. ^ Morgan, 2001, p. 370
  38. ^ Goodwin and Greenhall, 1961, p. 202
  39. ^ a b Gompper et al., 2006
  40. ^ Wozencraft, 2005, p. 626
  41. ^ Wozencraft, 2005
  42. ^ Cuarón et al., 2004, p. 222
  43. ^ a b c Jones and Lawlor, 1965, pp. 417–418
  44. ^ Holmgren 1990, pp. 58–59.
  45. ^ Helgen and Wilson, 2003
  46. ^ Morgan and Woods, 1986, p. 169
  47. ^ Horst et al., 2001, tables 1, 2, p. 413
  48. ^ Groves and Grubb, 2011, p. 27.
  49. ^ a b Grubb, 2005; Goodwin and Greenhall, 1961, p. 202
  50. ^ Reyna-Hurtado et al., 2008
  51. ^ "Flora and Fauna of Culebra, Puerto Rico".
  52. ^ "Archived copy" (PDF). Archived from the original (PDF) on March 4, 2016. Retrieved September 30, 2014.{{cite web}}: CS1 maint: archived copy as title (link)
  53. ^ "White-tailed Deer (Odocoileus virginianus)". www.arthurgrosset.com.
  54. ^ Grubb, 2005
  55. ^ Domning et al., 1997
  56. ^ Defler, 2019
  57. ^ Smith and Johnston, 2008
  58. ^ Chapman et al., 1980
  59. ^ Woods and Kilpatrick, 2005
  60. ^ Turvey, 2009
  61. ^ MacPhee and Meldrum, 2006
  62. ^ Goodwin and Greenhall, 1961, p. 202; Groves, 2005
  63. ^ Groves, 2005

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