Chitons (Polyplacophora) from Paleogene Strata in Western Washington State, U.S.A.

Dell’Angelo, Bruno; Bonfitto, Antonio; Taviani, Marco

doi:10.1666/10-114.1

Cited by 16 publications

(6 citation statements)

References 17 publications

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“…Moreover, most Palaeogene chiton species are known from single outcrops only, making biogeographic inference impossible. It is clear, however, that this is due to sampling bias rather than to true absence in the fossil record, as exemplified by the study of Dell'Angelo et al (2011) and the present one. Chiton remains are often overlooked by collectors and researchers (Puchalsky et al 2008) due to their resemblance to fragments of other molluscs and, often, small size.…”

mentioning

confidence: 68%

“…nov. by the presence of a distinct fold separating the central and lateral areas. Three other Lepidochitona species from the European Eocene show a similar morphology (Dell'Angelo et al 2011, Appendix 2): L. bernayi (Cossmann, 1888), L. defrancei (de Rochebrune, 1883), and L. grinionensis (Lamarck, 1802). The main characters of these species are presented in Table 1, based on the descriptions of Cossmann (1888) …”

Section: Lepidochitona Szoetsi Sp Novmentioning

confidence: 97%

“…Only 79 Palaeogene species were reported in a comprehensive review by Dell'Angelo et al (2011). Since then Cabrera & Olivero (2011) and Dell'Angelo et al (2012) each described rare unnamed chiton species from the Eocene of Antarctica and Italy respectively.…”

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confidence: 99%

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Polyplacophora from the Eocene of Gant, Hungary

Dell’Angelo¹,

Sosso²,

Kroh³

et al. 2015

Bull. Geosci.

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The only species of Polyplacophora known from the Eocene of Gánt is Tonicia pannonica. Re-examination of the type material of this species indicates that the two syntypes of Szőts belong to two different species. One of those syntypes (the tail valve) is designated as lectotype herein, in order to provide stability to nomenclature by preserving the generic attribution of the species pannonica to the genus Tonicia. New samples were collected near the type locality, and the nearly 200 valves recovered belong to four species: Tonicia pannonica, Lepidochitona gantensis sp. nov., L. szoetsi sp. nov., and L. viciani sp. nov. The paralectotype of Tonicia pannonica, an intermediate valve, is here excluded from that species and attributed to Lepidochitona szoetsi sp. nov. •

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confidence: 68%

Section: Lepidochitona Szoetsi Sp Novmentioning

confidence: 97%

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Polyplacophora from the Eocene of Gant, Hungary

Dell’Angelo¹,

Sosso²,

Kroh³

et al. 2015

Bull. Geosci.

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“…Polyplacophora are somewhat poorly represented in the fossil record due to factors such as the aragonite mineralogy and thin shell plates that make them prone to dissolution (Cherns and Wright, 2000), the typically high-energy depositional environments in which they live, plus inadequate sampling of sedimentary rocks for fossil chitons (Puchalski et al, 2008). Most records of Cenozoic fossil chitons from western North America are from the Pleistocene (e.g., Arnold, 1903;Berry, 1922Berry, , 1926Addicott, 1966), complemented with a few assemblages from the Pliocene (Vendrasco et al, 2012), Eocene/ Oligocene (Squires and Goedert, 1995), and Paleocene (Dell'Angelo et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The first Miocene chiton fauna from the northeastern Pacific

2022

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An assemblage of 34 chiton valves collected from rocks of the “Imperial” Formation sensu lato at Super Creek near Palm Springs, California, is described here. The sedimentary rocks exposed at Super Creek were deposited in the proto-Gulf of California during the Late Miocene. This chiton assemblage represents the first reported Miocene chitons from western North America. The chiton valves are classified as Callistochiton cf. C. elenensis, Chaetopleura cf. C. lanuginosa mixta, Calloplax roederi n. sp., Chiton solaris n. sp., Callistoplacidae sp. indet., and Chaetopleuridae sp. indet. Thick valves dominate the assemblage. The chiton fossils reflect the overall faunal pattern from the “Imperial” Formation s.l. of a strong similarity to taxa in the modern Gulf of California, with a Caribbean component as well. This assemblage fills a gap in the chiton fossil record and preserves details of the adaptive radiation of the Polyplacophora that occurred at the time in concert with the onset of an upwelling regime. UUID: http://zoobank.org/9947bfc9-84a3-4358-bac7-e660b936b067

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“…Marine molluscan fossils were first described from exposures of the Gries Ranch Formation along the Cowlitz River more than 100 years ago (Dickerson 1917;Van Winkle 1918) and monographed 80 years ago by Effinger (1938). Since then, many studies have included molluscan taxa from the Gries Ranch fauna (e.g., Dell'Angelo et al 2011;Goedert & Raines 2016, and references therein). Deposition of the Gries Ranch Formation likely occurred under subtropical conditions (Dickerson 1917;Van Winkle 1918) at depths of less than 100 m according to Effinger (1938), although Hickman (1984) has suggested that the Gries Ranch fauna may have been transported into deep water.…”

mentioning

confidence: 99%