PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Nerita (Theliostyla) triangulata

Taxonomy

Nerita (Theliostyla) triangulata was named by Gabb (1869). It is a 3D body fossil.

It was recombined as Nerita triangulata by Hanna (1927), Turner (1938), Weaver (1942).

Subspecies

Sister species lacking formal opinion data

Year	Name and author
1869	Nerita (Theliostyla) triangulata Gabb p. 170 figs. PL 28, Fig. 52, 62 a
1915	Nerita cowlitzensis Dickerson p. 58 figs. Plate 5, figures 7a, 7b
1922	Nerita washingtoniana Weaver and Palmer
1927	Nerita triangulata Hanna pp. 301 - 302 figs. Plate 46, figures 11, 12, 16, and 17
1938	Nerita triangulata Turner p. 95
1942	Nerita cowlitzensis Weaver p. 294
1942	Nerita triangulata Weaver p. 295
1942	Nerita washingtoniana Weaver p. 295
1976	Nerita (Theliostyla) triangulata Givens and Kennedy p. 960
1987	Nerita (Theliostyla) triangulata Squires p. 23 figs. Figure 14
2002	Nerita (Theliostyla) triangulata Squires and Saul

Time interval	Ma	Country or state	Original ID and collection number
Ypresian	56.0 - 48.07	USA (California)	Nerita triangulata (78722)
Eocene	56.0 - 33.9	USA (Oregon)	Nerita triangulata (200891)
Lutetian	48.07 - 41.03	USA (California)	Nerita triangulata (16712 200657 200659 200729 200731 200733 200734 220403 228148)
Lutetian	48.07 - 41.03	USA (Oregon)	Nerita triangulata (200874 200886 200892 200911 200914 201040)
Middle Eocene	48.07 - 37.71	USA (California)	Nerita triangulata (202082 202090)
Bartonian	41.03 - 37.71	USA (Washington)	Nerita cowlitzensis (52205 207129) Nerita washingtoniana (201124)