Proposal of Spinulacorpus biforme (Smales, 2014) n. g., n. comb. and the Spinulacorpidae n. fam. to resolve paraphyly of
- PDF / 1,168,496 Bytes
- 14 Pages / 547.087 x 737.008 pts Page_size
- 78 Downloads / 133 Views
(0123456789().,-volV) ( 01234567 89().,-volV)
Proposal of Spinulacorpus biforme (Smales, 2014) n. g., n. comb. and the Spinulacorpidae n. fam. to resolve paraphyly of the acanthocephalan family Rhadinorhynchidae Lu¨he, 1912 Daniel C. Huston
. Lesley R. Smales
Received: 20 April 2020 / Accepted: 20 June 2020 Ó Springer Nature B.V. 2020
Abstract Previous phylogenetic analyses of the Acanthocephala have demonstrated that the families Rhadinorhynchidae Lu¨he, 1912 and Transvenidae Pichelin & Cribb, 2001 are sister clades. However, a recent study found that the Rhadinorhynchidae is paraphyletic, due to the basal position of Rhadinorhynchus biformis Smales, 2014 relative to the Rhadinorhynchidae ? Transvenidae. We reassess these relationships with new single-gene and concatenated phylogenetic analyses utilising cox1 mtDNA, 18S rDNA and 28S rDNA, including recently available sequences. Although topologies differed among singlegene analyses, the overall results support R. biformis as representative of a lineage distinct from those of the Rhadinorhynchidae and Transvenidae. Examination of
This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as 4264FE4D-E886-4EED-BB8CBC45A9C5696A. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number. This is the Version of Record. This article is part of the Topical Collection Acanthocephala. D. C. Huston (&) Institute for Marine and Antarctic Studies, The University of Tasmania, Hobart, TAS 7005, Australia e-mail: [email protected] L. R. Smales Parasitology Section, South Australian Museum, Adelaide, SA 5000, Australia
additional specimens of R. biformis allowed us to identify morphological characters that further support this hypothesis. These results lead us to propose transfer of R. biformis to a new genus (Spinulacorpus n. g.) and family (Spinulacorpidae n. fam.) to resolve the paraphyly of the Rhadinorhynchidae.
Introduction A recent study characterising the molecular profiles of acanthocephalans from Australian marine teleosts (Huston et al., 2020) included new sequence data for Rhadinorhynchus biformis Smales, 2014. The phylogenetic analyses in that study suggested that R. biformis was basal to the sister clades Rhadinorhynchidae Lu¨he, 1912 and Transvenidae Pichelin & Cribb, 2001, resulting in a paraphyletic Rhadinorhynchidae. Because the original morphological description of R. biformis was based on only three specimens (Smales, 2014), taxonomic changes regarding this species were deferred pending availability of additional evidence (Huston et al., 2020). In the time since, additional molecular sequences have been made available for species of the Rhadinorhynchidae and Transvenidae (see Amin et al., 2020; Sharifdini et al., 2020) and the opportunity to examine the morphology of additional specimens of R. biformis arose. Thus, the aim of this study is to reassess the position of this species relative to the Rhadinorhynchidae
Data Loading...
