Hipposideridae Lydekker, 1891

Hipposideridae Lydekker, 1891 View in CoL

Aselliscus tricuspidatus (Temminck, 1835) . Temminck’s horseshoe bat occurs from Halmahera in the west to New Guinea and on to the Solomon Islands and Vanuatu in the east ( Flannery, 1995). In the Raja Ampat group, it has previously been recorded only from Waigeo ( Meinig, 2002; Wiantoro, 2011). It was captured on Kofiau during the 2011 survey, and in 2019 was detected unambiguously based on its echolocation calls that have a shape typical of hipposiderids and a characteristic frequency between 115 and 120 kHz (call type 118 sCF) ( Fig. 3 View Figure 3 ).

Hipposideros sp. cf. maggietaylorae Smith & Hill, 1981 . This medium-sized hipposiderid has been recorded from the Bismarck Archipelago, New Guinea and some nearby islands ( Armstrong & Wiantoro, 2021b; Flannery, 1995). Meinig (2002) and Wiantoro (2011) have recorded individuals provisionally assigned to this species from Waigeo and Batanta in the Raja Ampat group. A single specimen also provisionally referred to this species (pending a more detailed systematic review) was collected on Kofiau during the 2011 survey. Its echolocation calls were not recorded with the bat detector on the 2019 survey.

Hipposideros diadema (Geoffroy, 1813) . This species is widely distributed from Thailand to New Guinea, Australia and the Solomon Islands, and has previously been reported from Batanta and Waigeo in the Raja Ampat group ( Aguilar & Waldien, 2021). It was detected unambiguously based on its low frequency echolocation calls that have a shape typical of hipposiderids and a characteristic frequency typical of the species throughout its range (call type 55 mCF; Leary & Pennay, 2011; Armstrong, 2017) ( Fig. 3 View Figure 3 ).

Hipposideros ater Templeton, 1848 . This species occurs from India eastwards to the Philippines, Australia, New Guinea and the Bismarck Archipelago ( Flannery, 1995; Armstrong, 2021a). It is uncommon in Melanesia. Meinig (2002) reports it from Batanta. A single specimen was captured on Kofiau during the 2011 survey.