Journal article
Phylogenetics and systematics of the subfamilies Cheirurinae and Deiphoninae (Trilobita): Phylogenetics and systematics of the subfamilies
Swiss journal of palaeontology, Vol.143(1), 43
2024
DOI: 10.1186/s13358-024-00338-1
Abstract
Cheiruridae is one of the most diverse families of trilobites known from the Ordovician with 453 species assigned. Within Cheiruridae eight subfamilies (Acanthoparyphinae, Cheirurinae, “Cyrtometopinae”, Deiphoninae, Eccoptochilinae, Heliomerinae, Pilekiinae, and Sphaerexochinae) have historically been recognised. Insights about the evolution of the family and the relationships within and between subfamilies have been published. However larger scale phylogenetic hypotheses are needed in order to explore the monophyly, the basal structure, the deep nodes and the relationships of the subfamilies. Cheirurinae, Deiphoninae and “Cyrtometopinae” have historically been defined by various morphological features (e.g., anteroposterior constriction of the thoracic pleura, pleural furrow morphology, pygidial morphology) that differentiate them from the rest of Cheiruridae. However, the phylogenetic status of “Cyrtometopinae” is unclear owing to a lack of obvious synapomorphies. Here, we present phylogenetic analyses of Cheirurinae, Deiphoninae, and “Cyrtometopinae”. The results indicate that both Cheirurinae and Deiphoninae are monophyletic. “Cyrtometopines” are resolved as a paraphyletic grade at the base of Deiphoninae and Cyrtometopinae should be considered a junior subjective synonym of Deiphoninae. The new phylogenetic hypothesis reveals that paedomorphosis plays an important role in the evolution of Deiphoninae. Within Cheirurinae two major clades are identified, the ‘
Ceraurus
-like’ clade and the ‘
Ceraurinella
-like’ clade.
Details
- Title: Subtitle
- Phylogenetics and systematics of the subfamilies Cheirurinae and Deiphoninae (Trilobita): Phylogenetics and systematics of the subfamilies
- Creators
- Francesc Pérez-Peris - University of LausanneJonathan M. Adrain - University of IowaAllison C. Daley - University of Lausanne
- Resource Type
- Journal article
- Publication Details
- Swiss journal of palaeontology, Vol.143(1), 43
- Publisher
- Springer International Publishing
- DOI
- 10.1186/s13358-024-00338-1
- ISSN
- 1664-2376
- eISSN
- 1664-2384
- Grant note
- University of Lausanne 205321_179084 / Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (http://dx.doi.org/10.13039/501100001711)
- Language
- English
- Date published
- 2024
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984758268902771
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