NDLI: Banffia constricta, a putative vetulicolid from the Middle Cambrian Burgess Shale

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Banffia constricta, a putative vetulicolid from the Middle Cambrian Burgess Shale

Content Provider	Scilit
Author	Caron, Jean-Bernard
Copyright Year	2005
Description	Although Banffia constricta was first described in 1911, the affinities of this soft-bodied fossil animal have remained unclear. Banffia is redescribed here, on the basis of over 300 specimens. Banffia has a bipartite body measuring up to 10 cm in length. The entire body is axially twisted along a spiral, clockwise as seen from the front. The anterior section consists of two fused carapace-like units with a prominent crown-like structure at the anterior end surrounding the mouth. This crown-like structure is composed of three concentric circlets. A single antenniform outgrowth lies posterior to the mouth. The posterior section of Banffia is composed of 40 to 50 lightly sclerotised segments. The anus is terminal, and situated in a caudal notch. The gut is straight. Simple serially repeated structures along the gut may represent metameric mid-gut diverticulae. Banffia is considered to have been an epibenthic gregarious animal and possibly a deposit-feeder.Banffia is putatively classified as an end-member of the phylum Vetulicolia, in a new class, the Banffozoa. If the vetulicolids represent a stem-group deuterostome, the absence of gills and a possible endostyle in Banffia is problematic. The presence of mid-gut diverticulae in Banffia may represent a link with the protostomes.
Related Links	https://www.cambridge.org/core/services/aop-cambridge-core/content/view/BE8BE09A5025A6535DBFB1E2A78E4E82/S0263593300001255a.pdf/div-class-title-span-class-italic-banffia-constricta-span-a-putative-vetulicolid-from-the-middle-cambrian-burgess-shale-div.pdf
ISSN	17556910
e-ISSN	17556929
DOI	10.1017/s0263593300001255
Journal	Earth and Environmental Science Transactions of the Royal Society of Edinburgh
Issue Number	2
Volume Number	96
Language	English
Publisher	Cambridge University Press (CUP)
Publisher Date	2005-06-01
Access Restriction	Open
Subject Keyword	Earth and Environmental Science Transactions of the Royal Society of Edinburgh Cambrian Explosion gut Diverticulae Origins Of Bilaterians
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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