Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohort: Theria
Cohort: Eutheria
Cohort: Placentalia
Cladus: Boreoeutheria
Superordo: Laurasiatheria
Ordo: Chiroptera
Subordo: Microchiroptera
Superfamilia: Vespertilionoidea
Familia: Vespertilionidae
Subfamilia: Vespertilioninae
Tribus: Vespertilionini
Genus: Tylonycteris
Species: T. pachypus
Subspecies: T. p. aurex – T. p. bhaktii – T. p. fulvidus – T. p. meyeri – T. p. pachypus
Name
Tylonycteris pachypus Temminck, 1840
Type locality: Indonesia, West Java, Bantam.
References
Temminck, 1840. Monogr. Mamm., 2: 217.
Conservation status: IUCN: Tylonycteris pachypus (Least Concern)
Tylonycteris pachypus in Mammal Species of the World.
Wilson, Don E. & Reeder, DeeAnn M. (Editors) 2005. Mammal Species of the World – A Taxonomic and Geographic Reference. Third edition. ISBN 0-8018-8221-4.
Tylonycteris pachypus – Taxon details on National Center for Biotechnology Information (NCBI).
Tylonycteris pachypus – Taxon details on Integrated Taxonomic Information System (ITIS).
Tylonycteris pachypus – Taxon details on Encyclopedia of Life (EOL).
Distribution
Bangladesh, India, Burma, China, Thailand, Burma, Laos, Cambodia, Vietnam to Peninsular Malaysia, Philippines, Sumatra, Java, Borneo, Bali (Indonesia)
Andaman Islands (India)
Vernacular names
català: Ratpenat del bambú petit
English: Lesser Bamboo Bat
Bahasa Melayu: Kelawar Buluh Kecil
The lesser bamboo bat or lesser flat-headed bat (Tylonycteris pachypus) is one of the smallest species of vesper bat,[2] and is native to Southeast Asia.
Description
The bat, the size of a bumble bee, is among the smallest mammals on earth,[3] measuring about 4 cm (1.6 in) in head-body length with a tail about 2.5 cm (0.98 in) long and a wingspan of 19 cm (7.5 in). Adults weigh between 1.4 and 5.2 g (0.049 and 0.183 oz).[4]
The fur ranges from golden or cinnamon to dark brown, and is paler on the underside of the body. The head is flattened, with a short snout and triangular ears with a wide tragus.[4] The name pachypus means "thick-footed" and refers to the presence of smooth fleshy pads at the base of the thumb and on the heels of the feet, which help the bat grip onto bamboo stalks.[5] The wings have an aspect ratio of 6.2, allowing the bat to be agile in flight at the expense of a slow speed.[6]
A 4.8 gram T. pachypus has about an 80 mg brain.[7]
Distribution and habitat
Lesser bamboo bats are found throughout Southeast Asia from Bangladesh to southern China and Indonesia and also in southern and eastern India. It inhabits deciduous forests with extensive areas of bamboo growth, at altitudes from sea level to 1,260 m (4,130 ft).[1]
Five subspecies are recognised:[4]
Tylonycteris pachypus aurex - India and Bangladesh
Tylonycteris pachypus bhaktii - Lombok
Tylonycteris pachypus fulvidus - China, Indochina
Tylonycteris pachypus meyeri - Philippines
Tylonycteris pachypus pachypus - Indonesia
Biology and behaviour
Lesser bamboo bats typically roosts in the slit bored into the shoots of bamboo by leaf beetle larvae. The entrance slit to such cavities is too restrictive for most predators, such as snakes, but the flattened head of the bamboo bat allows it to enter. Although the exact species vary across their range, in Malaysia, the preferred bamboo is Gigantochloa scortechinii, and the beetles are most commonly Lasiochila goryi. The bats sometimes use rock crevices or holes in trees as alternative roosting sites.[8] Females tend to roost in small groups of about five individuals, although larger groupings of up to 38 have been reported. Males roost alone, or in small groups of up to six.[8][9] Individuals switch roosts every day, and larger groupings tend to be temporary.[4]
The bats are insectivorous, with flies, beetles, and hymenopterans forming the bulk of their diet.[10] They catch insects on the wing, using echolocation calls that start at 125 kHz and drop to 50 kHz.[4]
Reproduction
Lesser bamboo bats are polygynous, with females mating with multiple males throughout the September to November breeding season. Unusually for a tropical species, the females store the sperm after mating, with ovulation and fertilisation not occurring until January. Gestation lasts 12 to 13 weeks, with the young being born between April and May. Most births are of non-identical twins, although identical twins, singletons, and triplets are born on occasion.[9][11]
Newborn young are blind and hairless and weigh about 0.6 g (0.021 oz). The mother carries her young for the first couple of days, but then leaves them behind in the bamboo chamber. The young are weaned and able to fly 22 to 25 days after birth. When their fur first begins to grow it is dark in colour, taking on the lighter and more reddish adult hue by October of their first year. Both males and females are sexually mature by the start of the first breeding season after birth.[9][11]
Parasites
Bat flies which have the lesser bamboo bat as its host include Basilia brevipes, Basilia majuscula, and Basilia fletcheri.[12]
References
Tu, V.; Furey, N.; Görföl, T.; Csorba, G. (2020). "Tylonycteris pachypus". IUCN Red List of Threatened Species. 2020: e.T22577A22086494. doi:10.2305/IUCN.UK.2020-2.RLTS.T22577A22086494.en. Retrieved 16 November 2021.
Wilson, D.E.; Reeder, D.M., eds. (2005). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. ISBN 978-0-8018-8221-0. OCLC 62265494.
Smithsonian Institution
Eguren, R.E.; McBee, K. (October 2014). "Tylonycteris pachypus (Chiroptera: Vespertilionidae)". Mammalian Species. 46 (910): 33–39. doi:10.1644/910. S2CID 84929706.
Medway, L.; Marshall A.G. (December 1972). "Roosting associations of flat-headed bats, Tylonycteris species (Chiroptera: Vespertilionidae) in Malaysia". Journal of Zoology. 168 (4): 463–482. doi:10.1111/j.1469-7998.1972.tb01362.x.
Zhang, L.; et al. (March 2007). "Morphology, echolocation and foraging behaviour in two sympatric sibling species of bat (Tylonycteris pachypus and Tylonycteris robustula) (Chiroptera: Vespertilionidae)". Journal of Zoology. 271 (3): 344–351. doi:10.1111/j.1469-7998.2006.00210.x.
Pitnick, Scott; Jones, Kate E; Wilkinson, Gerald S (22 March 2006). "Mating system and brain size in bats". Proceedings of the Royal Society B: Biological Sciences. 273 (1587). Appendix 1: 719–724. doi:10.1098/rspb.2005.3367. PMC 1560082. PMID 16608692.
Medway, L.; Marshall, A.G. (August 1970). "Roost-site selection among flat-headed bats (Tylonycteris spp.)". Journal of Zoology. 161 (2): 237–245. doi:10.1111/j.1469-7998.1970.tb02038.x.
Hua, P.; et al. (September 2011). "Hierarchical polygyny in multiparous lesser flat-headed bats". Molecular Ecology. 20 (17): 3669–3680. doi:10.1111/j.1365-294X.2011.05192.x. PMID 21824210. S2CID 27648404.
Zhang, L.; et al. (September 2005). "Diet of Flat-Headed Bats, Tylonycteris pachypus and T. robustula, in Guangxi, South China". Journal of Mammalogy. 86 (1): 61–66. doi:10.1644/1545-1542(2005)086<0061:DOFBTP>2.0.CO;2.
Medway, L. (February 1972). "Reproductive cycles of the flat-headed bats Tylonycteris pachypus and T. robustula (Chiroptera: Vespertilioninae) in a humid equatorial environment". Zoological Journal of the Linnean Society. 51 (1): 33–61. doi:10.1111/j.1096-3642.1972.tb00772.x.
Theodor, Oskar (1956). "On the genus Tripselia and the group of Basilia bathybothyra (Nycteribiidae, Diptera)". Parasitology. 46 (3–4): 353–394. doi:10.1017/S003118200002655X. PMID 13378884.
"Lesser bamboo bat". National Center for Biotechnology Information (NCBI).
"Report". Integrated Taxonomic Information System.
"Lesser bamboo bat" at the Encyclopedia of Life
Retrieved from "http://en.wikipedia.org/"
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