Table 1. Vetulicolian species and their major morphological characters. Vetulicola sp. from the Shipai Formation of South China (Zhang and Hua, 2005), Didazoon sp. from the Chengjiang Biota (Aldridge et al., 2007), and Vetulicola sp. from the Guanshan Biota (Li et al., 2015) are not included in the table because their full systematic relationships have not been discerned.
Genus
Class Vetulicolida Chen and Zhou, 1997
Order Vetulicolata Hou and Bergström, 1997
Family Vetulicolidae Hou and Bergström, 1997
Genus Vetulicola Hou, 1987
Species
Vetulicola cuneata Hou, 1987
Vetulicola monile Aldridge et al., 2007
Vetulicola rectangulata Luo and Hu in Luo et al., 1999
Vetulicola
gangtoucunensis Luo et al., 2005
Vetulicola
longbaoshanensis Yang et al., 2010
Guanshan Occurrence
Chengjiang; Mural Formation
Chengjiang Chengjiang Guanshan Anterior opening
Lip-like, V-shaped in lateral view
Anterior edge nearly vertical
Anterior edge nearly vertical
Anterior edge nearly vertical
Anterior edge nearly vertical
Anterior section
Elongate with anterior termination tapered
Two longitudinal rows of nodes on each side of anterior section.
Subrectangular in lateral view
Subrectangular in lateral view
Subrectangular in lateral view
Lateral pouches
Five pouches; diamond to rounded-diamond shape
Five pouches; diamond to rounded-diamond shape
Five pouches; diamond to rounded-diamond shape
Five pouches; diamond to rounded-diamond
shape; with slits and filaments
Five pouches; diamond to rounded-diamond shape
Seven segments, oar- like. Posterior section originates from the dorsal margin of the anterior section at a position between the 3rd and 4th lateral pouches
Genus Beidazoon Shu, 2005
(=Bullivetula Aldridge et al., 2007)
Beidazoon venustum Shu, 2005
(=Bullivetula variola Aldridge et al., 2007)
Chengjiang
Anterior edge nearly vertical
Subrectangular, covered with a dense ornament of tubercles except for the marginal zone; no posterodorsal projection preserved
Genus Ooedigera Vinther et al., 2011
Family Didazoonidae Shu and Han in Shu et al., 2001
Genus Didazoon Shu and Han, 2001
Ooedigera peeli Vinther et al., 2011
Didazoon haoae, Shu et al., 2001
Sirius Passet
Anterior edge nearly vertical
Chengjiang
Circumventing feature behind the anterior opening narrow and indistinct, marked by short radiating lines
Genus Pomatrum Luo and Hu in Luo et al., 1999
(=Xidazoon Shu et al., 1999)
Pomatrum ventralis Luo and Hu in Luo et al., 1999 (=Xidazoon Shu et al., 1999)
Chengjiang
Circumventing feature behind the anterior opening divided into inner and outer regions
Ovoid in lateral view, characterized by a delicate reticulate or anastomosing pattern
Subquadrate in lateral view, lacking marginal projections, lacking lateral groove
Ovoid in lateral view, lacking lateral groove
Five pouches; weakly developed
Last segment subquadrate
Terminal
Holotype up to 80mm in length
Posterior section
Seven segments. Last 3 to 4 segments sometimes expanded to paddle-like
Not preserved
Seven segments. Last 3 to 4 segments sometimes expanded to paddle-like
Seven segments, each being oval-shaped
Anus Terminal Not preserved Terminal Terminal
Holotype up to 95mm in length
Only one specimen (which is 60mm long)
Additional comments
Terminal
8-14mm in length; note that Shu (2005) originally characterized this taxon in a separate family, Beidazoonidae; Aldridge et al. (2007) reassigned this to Vetulicolidae, which we follow here
Five pouches; diamond to rounded-diamond shape
Five pouches; cowl- shaped
Asymmetrically flattened
broader area in the distal part
Tapering anteriorly and posteriorly
Terminal Terminal
Five pouches; cowl- shaped
Tapering anteriorly and posteriorly, with multiple segments
Terminal
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