Compiled and Edited by:
Nancy B. Simmons and Andrea L. Cirranello
American Museum of Natural History

Your search for Pipistrellus murrayi resulted in 1 species-level match:

Pipistrellus Kaup, 1829. Skizz. Entwickel.-Gesch. Nat. Syst. Europ. Thierwelt 1: 98.

Vespertilio pipistrellus Schreber, 1774

Pipistrellus murrayi Andrews, 1900.
A Monograph of Christmas Island (Indian Ocean) p. 26.
Christmas Island Pipistrelle

Christmas Island (Indian Ocean)

Christmas Island (Indian Ocean)

CITES - Not Listed IUCN - Extinct (2017).

Subgenus Pipistrellus. Long recognized as a distinct species (see e.g., Chasen, 1940; Tate, 1942; Kitchener et al., 1986; Hill and Harrison, 1987), but synonymized with tenuis by Koopman (1973), a treatment followed by many subsequent authors (e.g., Corbet and Hill, 1992; Simmons, 2005). Morphologically and molecularly distinct from tenuis; see Helgen et al. (2009). Despite extensive efforts to locate additional individuals, the last sighting of this species occurred in August 2009 (Lumsden et al., 2021). Occasional strays of murrayi were observed on Cocos-Keeling Island; see Wood-Jones (1910).

References:

Chasen, F.N. 1940. A handlist of Malaysian mammals: a systematic list of the mammals of the Malay Peninsula, Sumatra, Borneo, and Java, including the adjacent small islands. Bulletin of the Raffles Museum (Singapore) 15: 1-209. Read article.

Corbet, G.B., and J.E. Hill 1992. Mammals of the Indomalayan Region. A Systematic Review. Oxford University Press, Oxford: 1-488. Not available online.

Helgen, K.M., K.N. Armstrong, J. Guzinski, R.A. How, and S.C. Donnellan. 2009. Taxonomic status of the Christmas Island Pipistrelle, Pipistrellus murrayi Andrews, 1900, as assessed by morphometric and molecular phylogenetic investigations of Indo-Australian Pipistrellus.  Report to the Commonwealt: 26 pp. Not available online.

Hill, J.E., and D.L. Harrison. 1987. The baculum in the Vespertilioninae (Chiroptera: Vespertilionidae) with a systematic review, a synopsis of Pipistrellus and Eptesicus, and the description of a new genus and subgenus. Bulletin of the British Museum (Natural History), Zoology Series 52(7): 225-305. Read article.

Kitchener, D.J., N. Caputi, and B. Jones. 1986. Revision of Australo-Papuan Pipistrellus and Falsistrellus (Microchiroptera: Vespertilionidae). Records of the Western Australian Museum 12: 435-495. Read article.

Koopman, K.F. 1973. Systematics of Indo-Australian PipistrellusPeriodicum Biologorum Zagreb 75: 113-116. Not available online.

Lumsden, L.F., P.A. Racey, and A.M. Hutson. 2021. Pipistrellus murrayi (errata version). The IUCN Red List of Threatened Species 2017: T136769A209549918. Read article.

Simmons, N.B. 2005. Chiroptera.  Pages 312-529 In D.E. Wilson and D.M. Reeder (eds.) Mammal Species of the World: A Taxonomic and Geographic Reference, 3rd edition, Volume 1. Baltimore: Johns Hopkins University Press. Read chapter.

Tate, G.H.H. 1942. Review of the vespertilionine bats: with special attention to genera and species of the Archbold collections. Bulletin of the American Museum of Natural History 8(7): 1-297. Read article.

Wood-Jones, F. 1910. Coral and Atolls. Lovell Reeve & Co., London: 454 pp. Read book.