- Source: Archaeopriapulida
Archaeopriapulida is a group of priapulid worms known from Cambrian lagerstätte. The group is closely related to, and very similar to, the modern Priapulids. It is unclear whether it is mono- or polyphyletic. Despite a remarkable morphological similarity to their modern cousins, they fall outside of the priapulid crown group, which is not unambiguously represented in the fossil record until the Carboniferous. In addition to well-preserved body fossils, remains of several archaeopriapulid taxa are known to have been preserved primarily as organic microfossils, such as isolated scalids and pharyngeal teeth. They are probably closely related or paraphyletic to the palaeoscolecids; the relationship between these basal worms is somewhat unresolved.
Species
Genus Acosmia Chen & Zhoi 1997 (Chengjiang deposits)
Acosmia maotiania Chen & Zhoi 1997
Genus Archotuba Hou et al. 1999 (possibly a Cnidarian) (Chengjiang deposits)
Archotuba conoidalis Hou et al. 1999
Genus Baltiscalida Slater et al. 2017
Baltiscalida njorda Slater et al. 2017
Genus Eopriapulites Liu & al 2014
Eopriapulites sphinx Liu & al 2014
Genus Eximipriapulus Ma et al. 2014 (Chengjiang deposits)
Eximipriapulus globocaudatus Ma et al. 2014
Genus Lagenula Luo & Hu 1999 nomen dubium (Chengjiang deposits)
Lagenula striolata Luo & Hu 1999 nomen dubium
Genus Laojieella Han et al. 2006 (Chengjiang deposits)
Laojieella thecata Han et al. 2006
Genus Lecythioscopa Conway Morris 1977 (Burgess Shale)
Lecythioscopa simplex (Walcott 1931) Conway Morris 1977 [Canadia simplex Walcott 1931]
Genus Oligonodus Luo & Hu 1999 nomen dubium (Chengjiang deposits)
Oligonodus specialis Luo & Hu 1999 nomen dubium
Genus Sandaokania Luo & Hu 1999 nomen dubium (Chengjiang deposits)
Sandaokania latinodosa Luo & Hu 1999 nomen dubium
Genus Singuuriqia Peel 2017 (Sirius Passet)
Singuuriqia simoni Peel 2017
Genus Sullulika Peel & Willman, 2018
Sullulika broenlundi Peel & Willman, 2018
Genus Vladipriapulus Ivantsov et al. 2005 (Sinsk Formation)
Vladipriapulus malakhovi Ivantsov et al. 2005
Genus Xishania Hong 1981
Xishania fusiformis Hong 1981
Xishania jiangxiensis Hong 1988
Genus Paratubiluchus Han, Shu, Zhang et Liu, 2004 (Chengjiang deposits)
Paratubiluchus bicaudatus Han, Shu, Zhang et Liu, 2004
Genus Xiaoheiqingella Hu 2002
Xiaoheiqingella peculiaris Hu 2002 [Yunnanpriapulus halteroformis Huang et al. 2004] (Chengjiang deposits)
Genus Priapulites Schram 1973 (Mazon Creek)
Priapulites konecniorum Schram 1973
Family Palaeopriapulitidae Hou et al. 1999
Genus Sicyophorus Luo & Hu 1999 (Chengjiang deposits)
Sicyophorus rara Luo & Hu 1999
Sicyophorus sp.
Genus Paraselkirkia Luo & Hu 1999
Paraselkirkia sinica (Luo & Hu 1999) Luo & Hu 1999
Family Selkirkiidae Conway Morris 1977 (stem Palaeoscolecida)
Genus Selkirkia Walcott 1911
Selkirkia elongata Luo & Hu 1999 (Chengjiang deposits)
Selkirkia columbia Walcott 1911 (Burgess Shale)
Selkirkia pennsylvanica Resser & Howell 1938
Selkirkia spencei Resser 1939
Selkirkia tsering Nanglu & Ortega-Hernández 2024
Selkirkia willoughbyi Conway Morris & Robison 1986
Order Ancalagonida Adrianov & Malakhov 1995 (stem Scalidophora)
Family Ancalagonidae Conway Morris 1977
Genus Ancalagon (Walcott 1911) Conway Morris 1977 (Burgess Shale)
Ancalagon minor (Walcott 1911) Conway Morris 1977
Family Fieldiidae Conway Morris 1977
Genus Fieldia Walcott 1912 (Burgess Shale)
Fieldia lanceolata Walcott 1912
Genus Scolecofurca Conway Morris 1977 (Burgess Shale)
Scolecofurca rara Conway Morris 1977
Family Ottoiidae Walcott 1911
Genus Ottoia Walcott 1911
Ottoia cylindrica Sun & Hou 1987
Ottoia guizhouenis Yang, Zhao & Zhang 2016
Ottoia prolifica Walcott 1911 (Burgess Shale)
Ottoia tenuis Walcott 1911
Ottoia tricuspida Smith, Harvey & Butterfield 2015
Family Corynetidae Huang, Vannier & Chen 2004
Genus Corynetis Luo & Hu 1999
Corynetis brevis Luo & Hu 1999 [Anningvermis multispinosus Huang et al. 2004) (Chengjiang deposits)
Corynetis fortis Hu et al. 2012 (Chengjiang deposits)
Corynetis pusillus Klug 1842
Family Miskoiidae Walcott 1911
Genus Louisella Conway Morris 1977 (Burgess Shale)
Louisella pedunculata (Walcott 1911) Conway Morris 1977
Genus Miskoia Walcott 1911
Miskoia placida Walcott 1931
Miskoia preciosa Walcott 1911