Ascheria Kaim, Jenkins, Tanabe, and Kiel, 2014

Kiel, Steffen, Hybertsen, Frida, Hyžný, Matúš & Klompmaker, Adiël A., 2020, Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru, Acta Palaeontologica Polonica 65 (1), pp. 109-138 : 125-128

publication ID	https://doi.org/ 10.4202/app.00631.2019
persistent identifier	https://treatment.plazi.org/id/F104879E-3B32-AD3F-F5D4-7224FE5FFEF5
treatment provided by	Felipe
scientific name	Ascheria Kaim, Jenkins, Tanabe, and Kiel, 2014
status

Treatment

Genus Ascheria Kaim, Jenkins, Tanabe, and Kiel, 2014 View in CoL

Type species: Abyssochrysos? giganteum Kiel, Campbell, and Gaillard 2010 , by original designation; Late Jurassic , California, USA .

Remarks.— Olsson (1931) introduced the genus Anconia for a large, high-spired gastropod from Punta Ancon (or Ancon Point) at Anconcito in southern Ecuador, Anconia elenensis Olsson, 1931 . This species resembles members of Ascheria in every aspect ( Kaim et al. 2014). Because Anconia Olsson, 1931 , is a junior homonym of the grasshopper Anconia Scudder, 1876 , we assign Anconia elenensis to Ascheria . Olsson (1931: 85) considered the strata at Punta Ancon as “equivalent of the Punta Bravo grits of Peru and therefore of middle Oligocene age”. Subsequent work on the radiolarians of these strata indicates a middle Eocene age instead ( Ordóñez 1995). Hence, Ascheria elenensis is of roughly the same age as the large abyssochrysoid Humptulipsia raui ( Goedert and Kaler, 1996) from seep

→ Fig. 15. The provannid gastropod Provanna pelada sp. nov. from the early Oligocene seep deposit at Cerros El Pelado block 3, Talara Basin, northern Peru. A. Holotype ( NRM Mo187052), smooth specimen in apertural (A 1) and abapertural (A 2) views. B . Paratype ( NRM Mo187053), specimen with faint spiral ornament, in apertural view. C . Paratype ( NRM Mo187054), specimen with axial and spiral sculpture, in two lateral views (C 1, C 2). D . Paratype ( NRM Mo187055), nearly smooth specimen with faint spirals. E . Paratype ( NRM Mo187056), showing distinctive prosocline growth increments and basal constriction. F . Paratype ( NRM Mo187057), smooth specimen. G . Paratype ( NRM Mo187058), specimen with rough, irregular prosocline ribs and fine spiral sculpture. All in lateral view, unless otherwise indicated .

deposits in the middle Eocene Humptulips Formation in Washington state, USA, and probably slightly older than the Ascheria ? sp. specimens reported from seep deposits in Barbados ( Kaim et al. 2014).