Work

Leptodesma parallelum Simpson

Year: 2026

Type: article

Abstract: Leptodesma parallelum Simpson in Lesley, 1889 Original source Lesley (1889): 448, fig. 14. Type stratum and age “Chemung Group”, Brallier Formation, Upper Devonian (Berg et al. 1993). Type locality “Hill north of Warren, Warren county, Pennsylvania ”, United States of America. Type material Lesley (1889: 332) mentioned L. parallelum as specimen no. 9610 of Randall’s collection (erroneously labelled as Cypricardia). It is stored in the collection of the Geological Survey of Pennsylvania. Remarks The species was first introduced in Lesley’s (1889) dictionary of the fossils from Pennsylvania. Lesley referred to descriptions by G.B. Simpson in the Transactions of the American Philosophical Society, which were presented at a society’s meeting in 1888 but not published before 1890. However, Lesley (1889: viii) stated that the description and illustration were prepared by Simpson, making him the author of the species. Chadwick (1935: 330) classified the species in the genus Prorhynchus, McAlester (1962) only stated that this species is not a Leptodesma. Amler & Friedel (2025) suggested an affiliation to Parallelodon.

DOI: 10.5281/zenodo.20750932

Authors: Friedel, Julia C., Neubauer, Thomas A., Amler, Michael R. W.

Institutions: University of Cologne, Naturalis Biodiversity Center, Bayerische Staatssammlung für Paläontologie und Geologie, Bavarian Natural History Collections, Ludwig-Maximilians-Universität München, Philipps University of Marburg

Topic: Paleontology and Stratigraphy of Fossils

Subfield: Paleontology

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: gold

OpenAlex ID: W7165200626

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