A reappraisal of <i>Nemavermes mackeei</i> from the Mazon Creek fossil site expands Carboniferous cyclostome diversity
Abstrak
AbstractNemavermes mackeei Schram, 1973, found in the Mazon Creek fossil site and the Bear Gulch Limestone, was described initially as a free-living marine nematode. Here we investigate 13 specimens of N. mackeei from the Mazon Creek to reassess its morphology and identity, and also two specimens originally identified as Gilpichthys greenei Bardack and Richardson, 1977. Based on the extensive morphological variation among these specimens, N. mackeei encompasses multiple species that are only distantly related. The holotype of N. mackeei is a proboscis of Tullimonstrum gregarium Richardson, 1966, making N. mackeei a junior synonym of T. gregarium. However, the other specimens that we investigated could not be attributed to T. gregarium. We name a new species from these specimens: Squirmarius testai new genus new species, a cyclostome. One specimen is likely a juvenile G. greenei. Other specimens were not identified during this study but represent a variety of vermiform bilaterians.UUID: http://zoobank.org/d8c63f6a-0ef4-4a34-8dbd-c1d9099589cc
Penulis (4)
Victoria E. McCoy
Jack Wittry
Hamed Sadabadi
Paul Mayer
Akses Cepat
- Tahun Terbit
- 2023
- Bahasa
- en
- Total Sitasi
- 4×
- Sumber Database
- CrossRef
- DOI
- 10.1017/jpa.2023.72
- Akses
- Open Access ✓