Halwaxiida

Halwaxiida
Temporal range: Early Cambrian–Middle Cambrian
Halkieria sp.
Scientific classification
Kingdom:
Animalia
Superphylum:
Lophotrochozoa
(unranked):
Halwaxiida
Families

Halwaxiida or halwaxiids is a proposed clade equivalent to the older orders Sachitida He 1980[2] and Thambetolepidea Jell 1981,[3] loosely uniting scale-bearing Cambrian animals, which may lie in the stem group to molluscs or lophotrochozoa. Some palaeontologists question the validity of the Halwaxiida clade.[4]

  1. ^ Zhao, Fangchen; Smith, Martin R; Yin, Zongjun; Zeng, Han; Li, Guoxiang; Zhu, Maoyan (2017). "Orthrozanclus elongata n. sp. And the significance of sclerite-covered taxa for early trochozoan evolution". Scientific Reports. 7 (1): 16232. Bibcode:2017NatSR...716232Z. doi:10.1038/s41598-017-16304-6. PMC 5701144. PMID 29176685.
  2. ^ Bengtson, S. (1985). "Redescription of the Lower Cambrian Halkieria obliqua Poulsen". Geologiska Föreningen i Stockholm Förhandlingar. 107 (2): 101–106. doi:10.1080/11035898509452621.
  3. ^ Jell, P. (1981). "Thambetolepis delicata gen. et sp. nov., an enigmatic fossil from the Early Cambrian of South Australia". Alcheringa: An Australasian Journal of Palaeontology. 5 (2): 85–89. doi:10.1080/03115518108565423.
  4. ^ Minelli, Alessandro (2009). Perspectives in Animal Phylogeny and Evolution. Oxford University Press. p. 61. ISBN 978-0-19-856620-5.