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Vetulicolidae

Extinct Cambrian family of vetulicolian animals

Extinct Cambrian family of vetulicolian animals

|†Vetulicola|Hou 1987 |†Beidazoon|Shu 2005 |†Ooedigera|Vinther et al. 2011

Vetulicolidae is a vetulicolian family from the Cambrian Stage 3 Maotianshan Shale and Sirius Passet Lagerstätte that consists of Vetulicola, Beidazoon, and Ooedigera. It is distinguished from the Didazoonidae by a harder body wall and the lack of an oral disc.

Description

Members of the Vetulicolidae have relatively robust body coverings, with a subquadrate to elongate (in lateral view) anterior part and an elongate, segmented posterior part. The marginal zone of the anterior part may have short projections dorsally and postereodorsally. and with the re-classification of Yuyuannozoon

Vetulicolids range in size from Beidazoon (around 1 cm long) to Vetulicola (around 8 or 9 cm). The anterior parts of Ooedigera and Beidazoon bear textural ornamentation.

Distribution

Ooedigera is known from the Sirius Passet Lagerstätte in far northern Greenland, while Beidazoon is known only from the Chengjiang fauna. Vetulicola is known from the Chengjiang fauna, the Guanshan biota (both of the Maotianshan Shales of China), as well as the Mural Formation of the Canadian Rockies. The Banffozoa have a similar distribution, while the Didazoonidae are limited to the Maotianshan Shales.

Taxonomy

The composition of the Vetulicolidae has seen several changes. Yuyuanozoon was at one point placed in the family, but has since been moved to the Didazoonidae. but its junior synonym Bullivetula was placed in the Vetulicolidae and later authors have followed that placement.

A 2024 study has found Vetulicolidae (as defined in a 2018 phylogeny)

(crown group)

An earlier study in 2014 placed vetulicolians as the sister-group to tunicates, but was unable to resolve any relationships among vetulicolians as a group:

References

Works cited

References

  1. {{harvnb. Li. Williams. Gabbott. Chen. 2018
  2. {{harvnb. Aldridge. Hou. Siveter. Siveter. 2007
  3. Vinther. Smith. Harper. 2011
  4. each genus currently assigned to this family bears a lateral groove.{{harvnb. Aldridge. Hou. Siveter. Siveter. 2007
  5. {{harvnb. Yang. Hou. Cong. Dong. 2010
  6. {{harvnb. Luo. Fu. Hu. Li. 2005
  7. {{harvnb. Vinther. Smith. Harper. 2011
  8. {{harvnb. Aldridge. Hou. Siveter. Siveter. 2007
  9. {{harvnb. Aldridge. Hou. Siveter. Siveter. 2007
  10. {{harvnb. García-Bellido. Lee. Edgecombe. Jago. 2014
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vetulicolia prehistoric-chordate-families
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