Hispaniolan solenodon
Hispaniolan solenodon[1] | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Eulipotyphla |
Family: | Solenodontidae |
Genus: | Solenodon |
Species: | S. paradoxus
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Binomial name | |
Solenodon paradoxus Brandt, 1833
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Hispaniolan solenodon range (brown) |
The Hispaniolan solenodon (Solenodon paradoxus), also known as the agouta,
Its smaller sister species of the same genus, Marcano's solenodon (S. marconoi) became extinct after European colonization. The Hispaniolan solenodon and the rat-like Hispaniolan hutia live in the same habitats and are the only surviving mammals native to the island.
Discovery
In 1833 the Russian Academy of Sciences received a new specimen from Haiti. Puzzled by the animal, curator Johann Friedrich von Brandt named it Solenodon paradoxus. (Solenodon means "grooved teeth".) No more information was known other than a relation to the Cuban solenodon (Atopogale cubana) discovered in 1861, and it was believed to be extinct. Addison Emery Verrill and Alpheus Hyatt Verrill rediscovered the animal in the Dominican Republic in 1907, but by 1964 it was again believed extinct.[4]
Description
The Hispaniolan solenodon resembles an oversized shrew; males and females are similar in size. Adults measure 49 to 72 cm (19 to 28 in) in total length, including a tail 20 to 25 cm (7.9 to 9.8 in) long, and weigh about 800 g (28 oz) on average. This makes them the largest extant members of the Soricomorpha. Although they are somewhat variable in colour, they are typically dusky brown over most of the body, with a paler underside and reddish fur on the sides of the head, throat, and upper chest. The tail, legs, snout, and eyelids are hairless.[5]
The forelegs are noticeably more developed than the hind legs, but all have strong claws useful for digging. The head is large in relation to its body, with a long rostrum and tiny eyes and ears partially hidden by the body fur. The nostrils open to the side and the snout has about a dozen long whiskers, up to 7 cm (2.8 in) in length, with a few smaller whiskers further back on the head.[5] A unique feature is the os proboscidis, a bone extending forward from the nasal opening to support the snout cartilage; this is not found even in other solenodons.[6]
The
Hispaniolan solenodons have patches of skin rich in
Distribution and habitat
Hispaniolan solenodona are found only on the island of Hispaniola, in the Dominican Republic and parts of southern Haiti. Their habitat is usually undisturbed moist forest below 1,000 m (3,300 ft) elevation, although they are sometimes found at higher altitudes or close to developed agricultural land.[2][5] There are two recognised subspecies:
- Solenodon paradoxus paradoxus – northern Dominican Republic
- Solenodon paradoxus woodi – far southern Dominican Republic and Haiti, Tiburon Peninsula
The Hispaniolan solenodon appears to have a patchy distribution. Populations are found both within and outside protected areas such as the Jaragua, Del Este and Sierra de Baoruco National Parks. In Haiti, it is reported from La Visite National Park and the Duchity region of the Massif de la Hotte.[10] Its presence in Los Haitises National Park in the Dominican Republic is inferred, but unconfirmed.
Behavior
Hispaniolan solenodons are nocturnal; during daylight hours, they stay in their burrows, trees, hollowed-out logs or caves, remaining hidden from view. Their burrows may contain multiple chambers and tunnels and are typically inhabited by an adult pair accompanied by up to six younger family members. When they emerge into the open air, they run on the soles of their feet, following an erratic, zigzag course.[5]
Hispaniolan solenodons feed mainly on
Reproduction
Breeding occurs throughout the year, although the females are receptive only for short periods once every ten days or so.
Ecology
The Hispaniolan solenodon is preyed upon by the ashy-faced owl (Tyto glaucops) and the Stygian owl (Asio stygius).[11] Because of a lack of natural land predators, the Hispaniolan solenodon did not evolve defenses, and it is a slow, clumsy runner. Feral dog and cat populations have become established, and small Asian mongooses (Urva auropunctata) were introduced to control rats in sugar cane fields; all three can potentially prey on solenodons.
Evolution
In 2016, researchers at the
Conservation
Today, the solenodon is one of the last two surviving native insectivorous mammals found in the Caribbean, and one of the only two remaining endemic terrestrial mammal species of Hispaniola.[15]
While the survival of the solenodon is uncertain, talk of conservation has been underway through the "Last Survivors Project", which has been collaborating with the Dominican government. In 2009, a five-year plan for conservation was funded which has been put in place to conduct field research, discover the best means by which to bring about their conservation, and organize monitoring tools to ensure their long-term survival.[16][17]
One of the aims of the conservation efforts is to increase local awareness of the species, particularly in the Dominican Republic. The Ornithological Society of Hispaniola showed pictures of the solenodon to the locals in both countries, and few knew what they were due to their nocturnal nature.[18] The Hispaniolan solenodon was identified as one of the top ten "focal species" in 2007 by the
Two conservation research and education programmes funded by the Darwin Initiative have recently been established, focusing on solenodons in both countries: "Building evidence and capacity to conserve Hispaniola's endemic land mammals" (started 2009), and "Building a future for Haiti's unique vertebrates" (started 2010). These collaborative projects represent a partnership between the EDGE Programme, the Durrell Wildlife Conservation Trust, BirdLife International, the Sociedad Ornitologica de la Hispaniola, the Dominican Republic National Zoo, Societe Audubon Haiti, and in-country project partners.
Habitat loss and predation by
Follow up work sequencing the whole genomes of six captured individuals more accurately predicts that solenodons diverged from other extant mammals 73.6 million years ago. Looking at single-nucleotide polymorphism (SNP) variation between northern and southern captured individuals enabled the researchers to infer population demography, which supported a likely subspecies split (S. paradoxus woodi the proposed name for the southern subspecies) within the Hispaniolan solenodon at least 300 thousand years ago.[22] The solenodon was downlisted from "Endangered" to "Least Concern" by the IUCN in 2020, on the basis of an increased awareness of its population size and range.
References
- ^
Hutterer, R. (2005). "Order Soricomorpha". In OCLC 62265494.
- ^ . Retrieved 19 November 2021.
- ^ "Agouta". Collins Dictionary.
- ^ Ley, Willy (December 1964). "The rarest animals". For Your Information. Galaxy Science Fiction. pp. 94–103.
- ^ a b c d e f g Derbridge, J.J.; et al. (December 2015). "Solenodon paradoxus (Soricomorpha: Solenodontidae)". Mammalian Species. 47 (927): 100–106. .
- ^
Wible, J.R. (December 2008). "On the cranial osteology of the Hispaniolan solenodon, Solenodon paradoxus Brandt, 1833 (Mammalia, Lipotyphla, Solenodontidae)". Annals of Carnegie Museum. 77 (3): 321–402. S2CID 86798636.
- ^
Folinsbee, K.A.; Müller, J. & Reisz, R.R. (2007). "Canine grooves: Morphology, function, and relevance to venom". Journal of Vertebrate Paleontology. 27 (2): 547–551. S2CID 54602365.
- ^
Dutton, M.J. (1992). "Venomous Mammals". Pharmacology & Therapeutics. 53 (2): 199–215. PMID 1641406.
- ^ Starck, D. & Poduschka, W. (1982). "On the ventral gland field of Solenodon paradoxus Brandt, 1833 (Mammalia, Insectivora)". Zeitschrift für Säugetierkunde. 47 (1): 1–12.
- ^ Turvey, Samuel T.; Meredith, Helen M.R.; Scofield, R. Paul (2008). "Continued survival of Hispaniolan solenodon Solenodon paradoxus in Haiti". Oryx. 42 (4): 611–614. .
- ^ Jonathan J. Derbridge et al., "Solenodon paradoxus (Soricomorpha: Solenodontidae)," Mammalian Species, Volume 47, Issue 927, 2015, Pages 100 - 106.
- ^ "Endangered venomous mammal predates dinosaurs' extinction". www.igb.illinois.edu (Press release). Carl R. Woese Institute for Genomic Biology. Archived from the original on 5 May 2016. Retrieved 8 September 2020.
- ^
Brandt, A.L.; Grigorev, K.; Afanador-Hernández, Y.M.; Paulino, L.A.; Murphy, W.J.; Núñez, A.; et al. (2016). "Mitogenomic sequences support a north–south subspecies subdivision within Solenodon paradoxus". Mitochondrial DNA Part A. 28 (5): 662–670. S2CID 32735234.
- ^
Roca, A.L.; et al. (April 2004). "Mesozoic origin for West Indian insectivores". Nature. 429 (6992): 649–651. S2CID 915633.
- ^ "Hispaniolan Solenodon". Edge of Existence. The Zoological Society of London. Archived from the original on 29 October 2013. Retrieved 25 October 2013.
- ^ "Solenodon". Durrell Wildlife Conservation Trust.
- ^ "Last Survivors". lastsurvivors.org. Archived from the original on 3 June 2010. Retrieved 31 August 2018.
- ^ Morelle, Rebecca. "Solenodon hunt: On the trail of a 'living fossil'". BBC News.
- ^ "Protection for 'weirdest' species". BBC News. 16 January 2007. Retrieved 22 May 2007.
- ^ "The Last Survivors Project". Archived from the original on 3 June 2010. Retrieved 14 January 2020.
- ^ "Venomous mammal caught on camera". BBC News. 9 January 2009. Retrieved 9 January 2009.
- ^
Oleksyk, Taras K.; Martínez-Cruzado, Juan Carlos; O'Brien, Stephen J.; Roca, Alfred L.; Antunes, Agostinho; Majeske, Audrey J.; et al. (1 June 2018). "Innovative assembly strategy contributes to understanding the evolution and conservation genetics of the endangered Solenodon paradoxus from the island of Hispaniola". GigaScience. 7 (6). PMID 29718205.
External links
- "Hispaniolan solenodon". EDGE of Existence. Archived from the original on 10 January 2014.
Saving the world's most evolutionarily distinct and globally endangered (EDGE) species
- Fernández, Eladio M. "Caribbean Nature Photography".
- S. paradoxus. Animal Info (image). Best photo available on the web.[citation needed]
- "Haitian Solenodon". Animal Info.
- Hispaniolan Solenodon. Durrell.org (film).
- "[no title cited]" (article with video). BBC News. 9 January 2009. sci / tech 7791989.
- "From the Dominican Republic" (article with video). BBC News. 2 June 2010.
- "Solenodon hunt: On the trail of a 'living fossil'" (article with video). BBC News. 30 May 2010.
- "The cave of bones: A story of solenodon survival" (article with video). BBC News. June 2010.
- "Solenodon hunt: Close encounter with a bizarre beast" (article with video). BBC News. 2 June 2010.
- "The Original" (Mutiara Fajar Dunia!). BBC News.