I'm trying to figure out the taxonomic history of Dallinella (formerly Terebratalia) smithi (Arnold, 1906). Described as a fossil from the Pliocene of Deadman Island (destroyed in 1928) in Los Angeles Harbor it was transfered to the genus Dallinella by Hatai (1940; The Cenozoic Brachiopoda of Japan. Science Reports, Tohoku Imperial University, series 2, v. 20, p. 1-413), which has mostly been ignore until recently. Hertlein and Grant (1960; The geology and paleontology of the marine Pliocene of San Diego, California; Paleontology, Coelenterata, Bryozoa, Brachiopoda, Echinodermata. San Diego Society of Natural History Memoir, v. 2, pt. 2A, pp. 73–133) synonymies it under T. arnoldi Hertlein and Grant 1960, but do not state a reason. My questions is why is it symonymised under a younger name (T. arnoldi) and not the other way around as D. smithi (=D. arnoldi)?
Dallinella smithi was first described by Arnold in 1903 and was originally classified under the genus Terebratula. However, subsequent studies have led to its reclassification under the genus Dallinella. The taxonomic status of Dallinella smithi can be summarized as follows: Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: Terebratulida Family: Terebrataliidae Genus: Dallinella Species: Dallinella smithi
Hi Chuck. Check Natalia Carranza's dissertation on this group. Natalia and Sandy looked at a number of Pliocene-recent brachiopods in our collections, including those species mentioned in this discussion.
Testing Species Designations in Terebratulide Brachiopods through the Quantitative Analysis of Morphology and Genetics and Its Implications for the Fossil Record
Lopez Carranza, Natalia
. University of California, Davis ProQuest Dissertations Publishing, 2020. 27670781.
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