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line:xlsx:hash://sha256/181a039844a33e66a35a457b7ece741051086608e425a040051b79581d606b97!/Sheet1!/L122	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet	Eptesicus demissus	Eptesicus demissus	Eptesicus demissus	Eptesicus demissus	Eptesicus demissus	Eptesicus dimissus	Cassistrellus dimissus	Cassistrellus dimissus	Cassistrellus dimissus	Eptesicus dimissus	Cassistrellus dimissus	Cassistrellus dimissus	Cassistrellus dimissus	Cassistrellus dimissus	Cassistrellus dimissus		[MSW2] Subgenus Eptesicus.; [MSW3] Subgenus Eptesicus. Reviewed by Myers et al. (2000). The correct spelling of this name is dimissus, not demissus; see Myers et al. (2000).; [HMW] Eptesicus dimissus Thomas, 1916 , “ Kao Nawng , Bandon , Malay Peninsula [= Thailand ], 3,500’ [= 1067 m ].” Originally treated as an individual of Eptesicus pachyotis by H. C. Robinson and C. B. Kloss in 1915, but O. Thomas described this bat as a distinct but related species. Traditionally associated with species of the Eptesicus serotinus group. It is not closely related to any Eptesicus , and therefore M. Ruedi and colleagues in 201 7 created a new genus, Cassistrellus , for this and its sister species. Recent molecular phylogenetic studies place this dimassus lineage as sister to Tylonycteris , and more distantly related to Philetor . Monotypic.; [batnames2022] Previously considered part of Eptesicus , but distinct; see Ruedi et al. (2018). And see also Myers et al. (2000). The correct spelling of this name is dimissus , not demissus ; see Myers et al. (2000).; [MDD2022] moved from Eptesicus to the new genus Cassistrellus; [IUCN] The correct spelling of this name is dimissus and not demissus (Myers et al . 2000).; [batnames2023] Previously considered part of Eptesicus , but distinct; see Ruedi et al. (2018). And see also Myers et al. (2000). The correct spelling of this name is dimissus , not demissus ; see Myers et al. (2000).; [MDD2023] moved from Eptesicus to the new genus Cassistrellus; [MDD2025_2.0] moved from Eptesicus to the new genus Cassistrellus; [batnames2025_1.7] Previously considered part of Eptesicus, but distinct; see Ruedi et al. (2018). And see also Myers et al. (2000). The correct spelling of this name is dimissus, not demissus; see Myers et al. (2000).; [MDD2025_2.2] moved from Eptesicus to the new genus Cassistrellus														dimissus	The correct spelling of this name is dimissus and not demissus (Myers et al . 2000).			dimissus	dimissus, demissus			dimissus (O. Thomas, 1916)|demissus (Chasen, 1940) [incorrect subsequent spelling]		Corbet, G.B. and Hill, J.E. 1980. A World List of Mammalian Species. British Museum (Natural History), London, 226 pp.		S Thailand	Honacki, J.H., Kinman, K.E. and Koeppl, J.W. 1982. Mammal Species of the World: A Taxonomic and Geographic Reference. Allen Press, Lawrence, 694 pp.	Eptesicus demissus	Thailand, Surat Thani, Khao Nong.	Thomas	1916	J. Fed. Malay St. Mus., 7:1.	Distribution: A poorly known species recorded only from southern Thailand.		Corbet, G.B. and Hill, J.E. 1991. A World List of Mammalian Species. Third edition. Oxford University Press, London, 243 pp. ISBN 0-19-854017-5	Surat serotine	S Thailand	Koopman, K.F. 1993. Order Chiroptera. Pp. 137–242 in Wilson, D.E. and Reeder, D.M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference. Second edition. Smithsonian Institution Press, Washington, 1206 pp.	Thomas	1916	J. Fed. Malay St. Mus., 7:1.	Subgenus Eptesicus.	Peninsular Thailand.	Thailand, Surat Thani, Khao Nong.		THOMAS	1916	Rostrum relatively broad. Last upper molar well developed. Braincase relatively high. Basicranial pits well developed. Size fairly large (forearm length, 42 mm).	Distribution: A poorly known species recorded only from southern Thailand.	No subspecies.		119	species	E. demissus	THOMAS	1916	Eptesicus	subgenus	Eptesicus demissus				Rostrum relatively broad. Last upper molar well developed. Braincase relatively high. Basicranial pits well developed. Size fairly large (forearm length, 42 mm).	No subspecies.		6. E. demissus THOMAS 1916 [serotinus group].	6	NA			Don E. Wilson & DeeAnn M. Reeder (editors). 2005. Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed), Johns Hopkins University Press, 2,142 pp. (Available from Johns Hopkins University Press, 1-800-537-5487 or (410) 516-6900, or at http://www.press.jhu.edu).	CHIROPTERA	Vespertilionidae	Vespertilioninae	Eptesicini	Eptesicus dimissus	Eptesicus	Eptesicus	dimissus	Thomas		1916		J. Fed. Malay St. Mus.	7		1		Surat Serotine	Thailand, Bandon, Kao Nawg, 3,500 ft. (1,166 m).	Peninsular Thailand, Nepal.	IUCN 2003 and IUCN/SSC Action Plan (2001) – Vulnerable as E. demissus (sic).		Subgenus Eptesicus. Reviewed by Myers et al. (2000). The correct spelling of this name is dimissus, not demissus; see Myers et al. (2000).	4C3D87E8FFE56A5BFA449DED1ECBB298	Handbook of the Mammals of the World – Volume 9 Bats, Barcelona: Lynx Edicions	978-84-16728-19-0	hbmw_9_Vespertilionidae_716.pdf.imf	hash://md5/b004ff90fffb6a44fffc96591e00bb32	788	zip:hash://sha256/ec5fd314a06aba1a7b0b72f23e54ac625ae272bd98f82f1d01f4c09627d9e8e0!/treatments-xml-main/data/4C/3D/87/4C3D87E8FFE56A5BFA449DED1ECBB298.xml	Cassistrellus dimissus	Vespertilionidae	Cassistrellus	dimissus		1916	Vespertilion de Surat Thani @fr | Surat-Helmfledermaus @de | Casistrelode Surat Thani @es | Surat Serotine @en	Eptesicus dimissus Thomas, 1916 , “ Kao Nawng , Bandon , Malay Peninsula [= Thailand ], 3,500’ [= 1067 m ].” Originally treated as an individual of Eptesicus pachyotis by H. C. Robinson and C. B. Kloss in 1915, but O. Thomas described this bat as a distinct but related species. Traditionally associated with species of the Eptesicus serotinus group. It is not closely related to any Eptesicus , and therefore M. Ruedi and colleagues in 201 7 created a new genus, Cassistrellus , for this and its sister species. Recent molecular phylogenetic studies place this dimassus lineage as sister to Tylonycteris , and more distantly related to Philetor . Monotypic.	Known only from a single specimen collected in S Thailand (Tai Rom Yen National Park, Surat Thani Province ) and eight specimens from S Nepal (in and near Royal Chitwan National Park); recently also a single specimen from N Laos (Ban Naten, Phongsaly Province ).	Head—body 59-63 mm, tail 40-41 mm, ear 15-4-16 mm, hindfoot 8:8-10 mm, forearm 38-9—-41-8 mm; weight 15 g (single individual). The Surat Helmeted Bat has short ( 3 mm ), sparsely haired chestnut-brown pelage on dorsum, individual hairs having brown tips and pale bases; ventral surface is pale brown; fur extends in a triangle onto base oftail. Short, rounded ears are sparsely furred on anterior surface and naked on posterior; they are triangular and fleshy. Short, round tragus has concave posterior margin and convex anterior margin; posterior edge of tragus and base of anterior edge of pinna appear to be slightly thickened. Muzzle is very broad. Skin on top of the head is loose, sometimes forming a fold running from ear to ear. Dark brown wing membranes are attached on side of foot near ankle; patagial membranes are almost hairless. Calcar with well-developed keel extends less than halfway to tail and may have a small lobe near the ankle. Tail extends 1-3 mm beyond border of uropatagium. Bare parts of skin are pinkish brown. Baculum is tiny and triangular in outline, much like those of Eptesicus serotinus group, but ventral parts have two lateral wings that are not present in Eptesicus . Skull is robust and relatively flat, with a moderately inflated braincase; it has well-developed sagittal and lambdoid crests, which meet near top of skull to form an occipital helmet. Rostrum is relatively short and broad. Bulbous part of lacrimal region has no frontal depression, but bears prominent supraorbital tubercles. On its ventral surface, skull has a pair of deep, well-delimited basisphenoid pits located between the cochleae;this is the most distinctive character of Cassistrellus . Deep basisphenoid pits between tympanic bullae, notably long, cuspidate C!, strong lambdoidal and occipital crests, and prominent preorbital processes are typical morphological features of the genus Cassistrellus . In the dentition, the bifid I’ barely extends beyond the cingulum of the C!. I? is approximately two-thirds the length of I*. P* is less than half the length of the adjacent C'. C! has a pronounced cingulum and a trace of a secondary cusp;it is especially long and slender. Condylo-canine length 14:6-16-5 mm; maxillary tooth row 5:8-6-4 mm.	All capture sites were situated in hilly terrain, with mixed deciduous or dipterocarp forests traversed by small streams or large rivers. In Nepal , also caught in a forest, dominated by sal ( Shorea robusta , Dipterocarpaceae ) trees. In Laos , the capture site was far from karstic or rocky areas, so presumably the species’ roosting sites are in trees rather than caves. Elevation ranges 190-674 m.	Derived from wing morphology, characteristics of ears, thumbs, hindfeet, and weak dentition, Surat Helmeted Bats are likely to be fast-flying that probably catch soft-bodied insects such as moths.	No information.	No information.	No information.	Classified as Data Deficient on The IUCN Red List (as Eptesicus dimissus ), as it is only known from three localities, and its ecology is almost entirely unknown. Further studies are needed into the distribution, abundance, natural history and threats to this species. It was not found during a series of recent surveys in forest areas in peninsular Thailand , including some around the type locality of the species.	Boitani et al. (2006) | Corbet & Hill (1992) | Csorba et al. (2016) | Francis (2008a) | Gorfol et al. (2019) | Hill & Harrison (1987) | Koubinova et al. (2013) | Lekagul & McNeely (1988) | Myers, P. et al. (2000) | Pearch & Writer (2009) | Robinson & Kloss (1915) | Ruedi, Eger et al. (2017) | Simmons (2005) | Tate (1942b) | Thomas (19164)	https://zenodo.org/record/6397894/files/figure.png	58. Surat Helmeted Bat Cassistrellus dimissus French: Vespertilion de Surat Thani / German: Surat-Helmfledermaus / Spanish: Casistrelo de Surat Thani Other common names: Surat Serotine Taxonomy. Eptesicus dimissus Thomas, 1916 , “ Kao Nawng , Bandon , Malay Peninsula [= Thailand ], 3,500’ [= 1067 m ].” Originally treated as an individual of Eptesicus pachyotis by H. C. Robinson and C. B. Kloss in 1915, but O. Thomas described this bat as a distinct but related species. Traditionally associated with species of the Eptesicus serotinus group. It is not closely related to any Eptesicus , and therefore M. Ruedi and colleagues in 201 7 created a new genus, Cassistrellus , for this and its sister species. Recent molecular phylogenetic studies place this dimassus lineage as sister to Tylonycteris , and more distantly related to Philetor . Monotypic. Distribution. Known only from a single specimen collected in S Thailand (Tai Rom Yen National Park, Surat Thani Province ) and eight specimens from S Nepal (in and near Royal Chitwan National Park); recently also a single specimen from N Laos (Ban Naten, Phongsaly Province ). Descriptive notes. Head—body 59-63 mm, tail 40-41 mm, ear 15-4-16 mm, hindfoot 8:8-10 mm, forearm 38-9—-41-8 mm; weight 15 g (single individual). The Surat Helmeted Bat has short ( 3 mm ), sparsely haired chestnut-brown pelage on dorsum, individual hairs having brown tips and pale bases; ventral surface is pale brown; fur extends in a triangle onto base oftail. Short, rounded ears are sparsely furred on anterior surface and naked on posterior; they are triangular and fleshy. Short, round tragus has concave posterior margin and convex anterior margin; posterior edge of tragus and base of anterior edge of pinna appear to be slightly thickened. Muzzle is very broad. Skin on top of the head is loose, sometimes forming a fold running from ear to ear. Dark brown wing membranes are attached on side of foot near ankle; patagial membranes are almost hairless. Calcar with well-developed keel extends less than halfway to tail and may have a small lobe near the ankle. Tail extends 1-3 mm beyond border of uropatagium. Bare parts of skin are pinkish brown. Baculum is tiny and triangular in outline, much like those of Eptesicus serotinus group, but ventral parts have two lateral wings that are not present in Eptesicus . Skull is robust and relatively flat, with a moderately inflated braincase; it has well-developed sagittal and lambdoid crests, which meet near top of skull to form an occipital helmet. Rostrum is relatively short and broad. Bulbous part of lacrimal region has no frontal depression, but bears prominent supraorbital tubercles. On its ventral surface, skull has a pair of deep, well-delimited basisphenoid pits located between the cochleae;this is the most distinctive character of Cassistrellus . Deep basisphenoid pits between tympanic bullae, notably long, cuspidate C!, strong lambdoidal and occipital crests, and prominent preorbital processes are typical morphological features of the genus Cassistrellus . In the dentition, the bifid I’ barely extends beyond the cingulum of the C!. I? is approximately two-thirds the length of I*. P* is less than half the length of the adjacent C'. C! has a pronounced cingulum and a trace of a secondary cusp;it is especially long and slender. Condylo-canine length 14:6-16-5 mm; maxillary tooth row 5:8-6-4 mm. Habitat. All capture sites were situated in hilly terrain, with mixed deciduous or dipterocarp forests traversed by small streams or large rivers. In Nepal , also caught in a forest, dominated by sal ( Shorea robusta , Dipterocarpaceae ) trees. In Laos , the capture site was far from karstic or rocky areas, so presumably the species’ roosting sites are in trees rather than caves. Elevation ranges 190-674 m. Food and Feeding. Derived from wing morphology, characteristics of ears, thumbs, hindfeet, and weak dentition, Surat Helmeted Bats are likely to be fast-flying that probably catch soft-bodied insects such as moths. Breeding. No information. Activity patterns. No information. Movements, Home range and Social organization. No information. Status and Conservation. Classified as Data Deficient on The IUCN Red List (as Eptesicus dimissus ), as it is only known from three localities, and its ecology is almost entirely unknown. Further studies are needed into the distribution, abundance, natural history and threats to this species. It was not found during a series of recent surveys in forest areas in peninsular Thailand , including some around the type locality of the species. Bibliography. Boitani et al. (2006), Corbet & Hill (1992), Csorba et al. (2016), Francis (2008a), Gorfol et al. (2019), Hill & Harrison (1987), Koubinova et al. (2013), Lekagul & McNeely (1988), Myers, P. et al. (2000), Pearch & Writer (2009), Robinson & Kloss (1915), Ruedi, Eger et al. (2017), Simmons (2005), Tate (1942b), Thomas (19164).	Simmons, N.B. and A.L. Cirranello. 2022B. Bat Species of the World: A taxonomic and geographic database. Accessed on 10/11/2022.	Vespertilionidae	Cassistrellus dimissus	Cassistrellus		dimissus	Thomas	1916	1	J. Fed. Malay St. Mus.	7:01	Surat Helmeted Bat	None.	Thailand, Bandon, Kao Nawg, 3,500 ft. (1,166 m).	Peninsular Thailand, Nepal.	Not listed.	Data Deficient as  Eptesicus dimissus 	Previously considered part of Eptesicus , but distinct; see Ruedi et al. (2018). And see also Myers et al. (2000). The correct spelling of this name is dimissus , not demissus ; see Myers et al. (2000).	Mammal Diversity Database. (2023). Mammal Diversity Database (Version 1.11) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.7830771 released 15 April 2023	Cassistrellus dimissus	23	Surat Helmeted Bat	Surat Serotine	Theria	Placentalia	Boreoeutheria	Laurasiatheria	CHIROPTERA	VESPERTILIONIFORMES	NA	NA	VESPERTILIONOIDEA	VESPERTILIONIDAE	VESPERTILIONINAE	VESPERTILIONINI	Cassistrellus	NA	dimissus	O. Thomas	1916	1	Eptesicus_dimissus	Thomas, O. (1916). List of Microchiroptera, other than leaf-nose bats, in the collection of the Federated Malay States Museums. Journal of the Federated Malay States Museums, 7, 1.	https://www.biodiversitylibrary.org/item/62946#page/5/mode/1up	BM 1916.4.21.1		"Kao Nawng, Bandon, Malay Peninsula [= Thailand], 3,500' [= 1067 m]."			dimissus (O. Thomas, 1916)	moved from Eptesicus to the new genus Cassistrellus	Ruedi, M., Eger, J. L., Lim, B. K., & Csorba, G. (2018). A new genus and species of vespertilionid bat from the Indomalayan Region. Journal of mammalogy, 99(1), 209-222.	Nepal|Laos|Thailand	Asia	Indomalaya	DD	0	0	0	Cassistrellus_dimissus	0	manual	Eptesicus_dimissus	0	IUCN. 2022. The IUCN Red List of Threatened Species. Version 2022-1. https://www.iucnredlist.org. Accessed on [28 September, 2022].	7921	Eptesicus dimissus	ANIMALIA	CHORDATA	MAMMALIA	CHIROPTERA	VESPERTILIONIDAE	Eptesicus	dimissus	Thomas, 1916	The correct spelling of this name is dimissus and not demissus (Myers et al . 2000).	20000000	Eptesicus dimissus	Data Deficient		2016	2015-12-07 00:00:00 UTC	3.1	English	This species is assessed as Data Deficient as it is only known from two locations from a couple of specimens, and there is no further information on its range, major threats, population status or ecological requirements.	Little is known about the habitat or ecology of this species, although at the type locality, it was collected at an elevation of 1,166 m (Simmons 2005). In Nepal, eight individuals were found at two localities in Chitwan National Park, where bats were caught in mist nets set across stream and nearby forest, which the vegetation at one location is mixed deciduous forest and another location is forest dominated by Sal trees (Myers et al. 2000).	The threats to this species are not known.	The abundance, population size and trends for this species are not known.	Unknown	This species is known from a single specimen collected in southern Thailand (Bandon, Kao Nawg = Khao Nong, Tai Rom Yen National Park, Surat Thani Province) and from southern Nepal (Myers et al. 2000) where it has been recorded in and near Royal Chitwan National Park. It was not found during a series of recent surveys in forest areas in peninsular Thailand, including around the type locality of this species (P. Soisook pers. comm).		Terrestrial	This species is known to occur in Royal Chitwan National Park, Nepal (Myers et al . 2000) and in Tai Rom National Park, Thailand. Further studies are needed into the distribution, abundance, natural history and threats to this species.	Indomalayan|Palearctic		FALSE	FALSE	Global	Simmons, N. B., & Cirranello, A. L. (2023). Batnames.org Species List Version 1.4 (1.4). Zenodo. https://doi.org/10.5281/zenodo.8136157 	Vespertilionidae	Cassistrellus		dimissus	Thomas	1916	1	J. Fed. Malay St. Mus.	7:01	Surat Helmeted Bat	None.	Thailand, Bandon, Kao Nawg, 3,500 ft. (1,166 m).	Peninsular Thailand, Nepal.	Not listed.	Data Deficient as  Eptesicus dimissus 	Previously considered part of Eptesicus , but distinct; see Ruedi et al. (2018). And see also Myers et al. (2000). The correct spelling of this name is dimissus , not demissus ; see Myers et al. (2000).	Cassistrellus dimissus	1005701	23	Surat Helmeted Bat	Surat Serotine	Theria	Placentalia	Boreoeutheria	Laurasiatheria	CHIROPTERA	VESPERTILIONIFORMES	NA	NA	VESPERTILIONOIDEA	Vespertilionidae	VESPERTILIONINAE	VESPERTILIONINI	Cassistrellus	NA	dimissus	O. Thomas	1916	1	Eptesicus_dimissus	Thomas, O. (1916). List of Microchiroptera, other than leaf-nose bats, in the collection of the Federated Malay States Museums. Journal of the Federated Malay States Museums, 7, 1.	https://www.biodiversitylibrary.org/item/62946#page/5/mode/1up	BM 1916.4.21.1		"Kao Nawng, Bandon, Malay Peninsula [= Thailand], 3,500' [= 1067 m]."			dimissus (O. Thomas, 1916)	moved from Eptesicus to the new genus Cassistrellus	Ruedi, M., Eger, J. L., Lim, B. K., & Csorba, G. (2018). A new genus and species of vespertilionid bat from the Indomalayan Region. Journal of mammalogy, 99(1), 209-222.				Nepal|Laos|Thailand	Asia	Indomalaya	DD	0	0	0	Cassistrellus_dimissus	0	manual	Eptesicus_dimissus	0	Burgin, C. J., Zijlstra, J. S., Becker, M. A., Handika, H., Alston, J. M., Widness, J., Liphardt, S., Huckaby, D. G., and Upham, N. S. (2025). How many mammal species are there now? Updates and trends in taxonomic, nomenclatural, and geographic knowledge. Journal of Mammalogy in revision: TBD. https://doi.org/10.1101/2025.02.27.640393	Cassistrellus_dimissus	1005701	23	Surat Helmeted Bat	Surat Serotine	Theria	Placentalia	Boreoeutheria	Laurasiatheria	Chiroptera	Yangochiroptera	NA	NA	Vespertilionoidea	Vespertilionidae	Vespertilioninae	Vespertilionini	Cassistrellus	NA	dimissus	O. Thomas	1	Eptesicus dimissus	Thomas, O. 1916. List of Microchiroptera, other than leaf-nose bats, in the collection of the Federated Malay States Museums. Journal of the Federated Malay States Museums 7:1-6.	https://www.biodiversitylibrary.org/page/19063736	BMNH:Mamm:1916.4.21.1	holotype	https://data.nhm.ac.uk/object/5c5a6045-4708-427f-868c-b49b37d52ef0	"Kao Nawng, Bandon, Malay Peninsula [= Thailand], 3,500' [= 1067 m]."			moved from Eptesicus to the new genus Cassistrellus	Ruedi, M., Eger, J. L., Lim, B. K., & Csorba, G. (2018). A new genus and species of vespertilionid bat from the Indomalayan Region. Journal of mammalogy, 99(1), 209-222.				Nepal|Laos|Thailand	Asia	Indomalaya	DD (as Eptesicus dimissus)	0	0	0	Cassistrellus_dimissus	0	manual	Eptesicus_dimissus	0	Simmons, N. B., & Cirranello, A. L. (2025). Batnames.org Species List Version 1.7 (1.7). Zenodo. https://doi.org/10.5281/zenodo.14796586	Vespertilionidae	Cassistrellus		dimissus	Thomas	1916	1	J. Fed. Malay St. Mus.	7:01	Surat Helmeted Bat	None.	Thailand, Bandon, Kao Nawg, 3,500 ft. (1,166 m).	Peninsular Thailand, Nepal.	<a href='https://cites.org/eng/app/appendices.php' target='_blank'>Not Listed</a>	<a href='https://www.iucnredlist.org/species/7921/22118595/' target='_blank'>Data Deficient as Eptesicus dimissus</a>	Previously considered part of Eptesicus, but distinct; see Ruedi et al. (2018). And see also Myers et al. (2000). The correct spelling of this name is dimissus, not demissus; see Myers et al. (2000).		Mammal Diversity Database. (2025). Mammal Diversity Database (Version 2.2) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.15007505	NA	Eptesicus dimissus; Cassistrellus dimissus; Cassistrellus dimissus; Cassistrellus dimissus; Eptesicus dimissus; Cassistrellus dimissus; dimissus; Vespertilion de Surat Thani; Surat-Helmfledermaus; Casistrelode Surat Thani; Surat Serotine; Surat Helmeted Bat; Surat Serotine; Surat Serotine; Surat Helmeted Bat; C. dimissus