Mollusks and a crustacean from early Oligocene methane-seep deposits in the Talara Basin, northern Peru Kiel, Steffen Hybertsen, Frida Hyžný, Matúš Klompmaker, Adiël A. Acta Palaeontologica Polonica 2020 2019-12-06 65 1 109 138 7SYYS Kiel & Hybertsen & Hyžný & Klompmaker, 2020 Kiel & Hybertsen & Hyžný & Klompmaker 2020 [808,998,160,188] Gastropoda Pyropeltidae Pyropelta Animalia Lepetellida 13 122 Mollusca species seca sp. nov.   Fig. 11.  Zoobank LCID: urn:lsid:zoobank.org:act: 005AF820-5BD6-42C1- 9AE6-F1F03A3EC479  Etymology: For Quebrada Seca river valley.  Type material:  Holotype: NRM Mo187036 from Cerro La Salinablock 6.  Paratypes: NRMMo187035, 187037–187039 from block 6.    Typelocality: Cerro La Salinablock 6, Talara Basin, Peru.   Typehorizon: Early Oligocene part of the Heath shale.  Material.— The typematerial and a few further unnumbered specimens from Cerro La Salinablocks 6 and 9, and one unnumbered specimen from Cerros El Peladoblock 2. All upper Oligocene, Talara Basin, Peru.  Dimensions(in mm).—The largest specimen, L = 2.5, H = 1.4.  Diagnosis.—Tall, oval to elongate-oval shell; apex with a slight forward inclination; shell with cone-in-cone layering, surface smooth; base flat to concave.  Fig. 10. The possible neomphalid  Retiskenea? sp. (PRI 80014) from the early Cenozoic Lomitos cherts seep deposits near Negritos, Talara Basin, northern Peru.  Description.—Small limpet shell, tall, posterior slope gently and irregularly convex, anterior slope irregular, more-orless straight; base oval to elongate-oval, flat or convex with lateral margins lower than anterior and posterior margins; apex in central or very slightly anterior position, slightly inclined towards anterior; shell surface smooth, with cone-in-cone layering.  Fig. 11. The vetigastropod  Pyropelta seca sp. nov.from early Oligocene seep deposits at Cerro La Salina block 6, Talara Basin, northern Peru. A. Paratype NRM Mo187035) in lateral (A 1) and apical (A 2) views. B. Holotype (NRM Mo187036) in lateral (B 1) and apical (B 2) views. C. Paratype (NRM Mo187037) in lateral (C 1) and apical (C 2) views. D. Paratype (NRM Mo187038) in lateral (D 1) and apical (D 2) views. E. Paratype (NRM Mo187039) in anterior view.  Remarks.—Although the shell microstructure and protoconch are unknown, this species is placed in  Pyropeltabased on its cone-in-cone typelayered shell. This typeof layering is regularly seen in  Pyropelta( McLean and Haszprunar 1987; McLean 1992; Sasaki et al. 2003, 2008; Zhang and Zhang 2017) but not in other cocculiniform genera, and results from alternating layers with crossed lamellar or crossed acicular structure and prismatic structure ( Kiel 2004). Compared to  Pyropelta seca,  Pyropelta elongata Zhang and Zhang, 2017, from methane seeps in the South ChinaSea is similarly elongated, but not as tall ( Zhang and Zhang 2017).  Pyropelta ryukyuensis Sasaki, Okutani, and Fujikura, 2008, from hydrothermal vents in the Okinawa Trough ( Sasaki et al. 2008) is broader and less tall than  Pyropelta seca. Even broader and lower are  Pyropelta musaicaand  Pyropelta craigsmithi McLean, 1992;  Pyropelta corymba McLean and Haszprunar, 1987, is also broader but can be as tall as  Pyropelta seca( McLean and Haszprunar 1987; McLean 1992).  Stratigraphic and geographic range.—Early Oligocene of the Talara Basin, northern Peru. NRM Mo Cerro La Salina 13 122 1 holotype [832,1404,365,386] NRM 13 122 1 paratype [808,1364,398,419] Peru Cerro La Salina Talara Basin 13 122 1 holotype Cerros El Pelado Peru Cerro La Salina upper Oligocene 13 122 1