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File:Ou et al. 2012 f06.jpg

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Fossils of vetulicolians

Summary

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Description
English: Evidence for the presence of a pharynx and dorsal/ventral feeding gutters in vetulicolians. (A) Vetulicola monile (ELI-SJ1221A) and (B) Vetulicola rectangulata (ELI-SJ1168A), showing remains of food boluses (arrowed) located along a ventral gutter in posterior region of the pharyngeal cavity. (C,D) Close-up images of boxed areas in (A) and (B), respectively; note that posteriorly the food boluses are in continuity with the intestine within the tail. (E) Heteromorphus longicaudatus (ELI-SJ1247), showing food remains (arrowed) along the ventral side. (F,G) V. rectangulata, specimens ELI-SS004A and SS002A, both showing food remains (arrowed) and rearward constriction of pharynx, indicating site of a putative esophagus. (H,I) V. rectangulata, specimens ELI-EJ05832 and ELI-1033A, both showing an expansion (starred) in proximal region of the intestine, possibly equivalent to a stomach. Abbreviations: Fp, fin-like proboscis; G, gill slit; In, intestine; M, mouth; Mb, membrane; T, tail. Scale bars: 1 cm in (A), (B), (E); 5 mm in (C), (D), (F) to (I).
Date
Source Ou, Q., Han, S.C., Morris, J. et al. Evidence for gill slits and a pharynx in Cambrian vetulicolians: implications for the early evolution of deuterostomes. BMC Biol 10, 81 (2012). https://doi.org/10.1186/1741-7007-10-81
Author Qiang Ou, Simon Conway Morris, Jian Han, Zhifei Zhang, Jianni Liu, Ailin Chen, Xingliang Zhang & Degan Shu

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current08:12, 2 July 2024Thumbnail for version as of 08:12, 2 July 20241,841 × 1,699 (2.19 MB)Qohelet12 (talk | contribs)Uploaded a work by Qiang Ou, Simon Conway Morris, Jian Han, Zhifei Zhang, Jianni Liu, Ailin Chen, Xingliang Zhang & Degan Shu from Ou, Q., Han, S.C., Morris, J. et al. Evidence for gill slits and a pharynx in Cambrian vetulicolians: implications for the early evolution of deuterostomes. BMC Biol 10, 81 (2012). https://doi.org/10.1186/1741-7007-10-81 with UploadWizard

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