occurrenceID	taxonID	catalogNumber	collectionCode	institutionCode	typeStatus	verbatimLabel	sex	individualCount	eventDate	recordedBy	recordNumber	decimalLatitude	decimalLongitude	minimumElevationInMeters	maximumElevationInMeters	minimumDepthInMeters	maximumDepthInMeters	country	stateProvince	municipality	locality	references	basisOfRecord
03EC879B383DFFF5FEADA5D4E516C326.mc.3B2D3CD0383DFFF7FE9DA48BE28CC473	03EC879B383DFFF5FEADA5D4E516C326.taxon				holotype	Type locality: Gulf of Oman, 156 fathoms [= 285 m] (by original designation)		1						285				Oman			Gulf	http://treatment.plazi.org/id/03EC879B383DFFF5FEADA5D4E516C326	MaterialCitation
03EC879B383FFFF3FEADA326E405C68E.mc.3B2D3CD03838FFF2FE9DA039E586C326	03EC879B383FFFF3FEADA326E405C68E.taxon				holotype	Type locality: Padang, Sumatra (by original designation)		1											Sumatera Utara		Padang	http://treatment.plazi.org/id/03EC879B383FFFF3FEADA326E405C68E	MaterialCitation
03EC879B383FFFF3FEADA326E405C68E.mc.3B2D3CD03839FFF3FE9DA326E401C68E	03EC879B383FFFF3FEADA326E405C68E.taxon					It is easy to distinguish this species from O. (N.) bicarinata (Sowerby, 1844) and Opalia (N.) crassilabrum (Sowerby, 1844), two Indo­Pacific species lacking a basal ridge. Opalia (O.) burchorum DuShane, 1988 from Hawaii is similar to O. (O.) sumatrensis, but differs in having a dark brown protoconch and the costae are not angular in the center of the teleoconch whorls. Opalia (N.) minervae (Thiele, 1925) from Padang is similar in that it has angular costae and spiral lines, but it lacks the basal ridge that is present in O. sumatrensis. Since there are similarities between the molluscan fauna of Easter Island and the fauna of northern New Zealand, we compared the Opalia species collected from Easter Island with O. (N.) ahiparana (Powell, 1930) and O. (Pliciscala) zelandica (Finlay, 1930), two Opalia species found off the north end of North Island, New Zealand. Opalia (N.) ahiparana (Powell, 1930) not only has nodules on the noticeably biangular body whorl, it lacks a basal ridge. Opalia (P.) zelandica (Finlay, 1930), a species illustrated in Powell (1979), lacks a basal ridge and the angular costae on the teleoconch whorls. Thus, the two Opalia species known from northern New Zealand are easily distinguishable from O. sumatrensis. Opalia sumatrensis is represented from Easter Island by two complete specimens. Outside of the type lot at the ZMB (2 specimens), this is probably the only other known record of this species		2										New Zealand		Easter Island	It	http://treatment.plazi.org/id/03EC879B383FFFF3FEADA326E405C68E	MaterialCitation
