Acteon

Helwerda, Renate A., 2015, Acteonidae, Bullinidae and Ringiculidae (Gastropoda: Heterobranchia) from the Plio-Pleistocene of the Philippines, Zootaxa 3990 (2), pp. 197-220 : 204

publication ID	https://doi.org/ 10.11646/zootaxa.3990.2.2
publication LSID	lsid:zoobank.org:pub:BDF1BC11-4848-4858-99DC-0336A5FBEE2B
DOI	https://doi.org/10.5281/zenodo.6116507
persistent identifier	https://treatment.plazi.org/id/03FA878C-9517-FE4D-FF26-E5E300B2C842
treatment provided by	Plazi
scientific name	Acteon
status

Treatment

Acteon View in CoL spec 4

( Figure 12 View FIGURE 8 – 13. 8 )

Material. Tiep2 (1) RGM 961.770, Tiep5 (1) RGM 961.847.

Characterization. Shell small, tall, with flattened sides; H 1.75 mm, W 1.12 mm; protoconch slightly elevated, 1.2 whorl, DP 0.71 mm; nucleus small, DN 0.25 mm; lower two-thirds of teleoconch whorls sculpted with fine punctuated spiral grooves, becoming stronger towards base; interspaces large, becoming smaller towards base; two separate weak punctuated spiral grooves present on upper one-third of first teleoconch whorl; suture weakly channeled with punctuated spiral groove broader than grooves on rest of whorl; aperture narrow; columella with weak single fold; umbilicus very narrow.

Remarks. This species is distinguished from Acteon spec 1 by the presence of weak punctuated spiral ribs on the upper one-third of teleoconch whorls. All species within Acteonidae , of which material is well described and illustrated, differ from the species discussed here in their sculptural details.