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Echinoidea name details

Triplacidiids sensu Smith & Kroh, 2011 †

738378  (urn:lsid:marinespecies.org:taxname:738378)

temporary name
Family

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marine, brackish, fresh, terrestrial
fossil only
Smith, A. B. & Kroh, A. (eds.). (2011). The Echinoid Directory. World Wide Web electronic publication., available online at http://www.nhm.ac.uk/research-curation/projects/echinoid-directory
note: https://www.nhm.ac.uk/our-science/data/echinoid-directory/taxa/taxon.jsp?id=1566 [details]   
Taxonomic remark Triplacidiids are a group Camarodonta with:
- apical disc relatively small; monocyclic. Periproct subcircular with smooth...  
Taxonomic remark Triplacidiids are a group Camarodonta with:
- apical disc relatively small; monocyclic. Periproct subcircular with smooth edges (periproctal plates not indenting apical ring);
- ambulacra with echinid style compounding;
- primary tubercles in ambulacral and interambulacral zones similar; imperforate and obviously crenulate;
- peristome much larger than apical disc; no phyllodes and shallow buccal notches;
- Lantern unknown.

Apart from Triplacidia Smit & Kroh (2011) included a number of relatively poorly known fossil camarodont genera in this group (Eurypneustes, Gagaria, Mistechinus, Polyplacidia). A formal analysis of the group is missing so far and no formal family name has been established. The grouping has therefore been included as temporary name only in WoRMS. [details]
Kroh, A.; Mooi, R. (2024). World Echinoidea Database. Triplacidiids sensu Smith & Kroh, 2011 †. Accessed at: https://marinespecies.org/Echinoidea/aphia.php?p=taxdetails&id=738378 on 2024-03-29
Date
action
by
2013-08-28 09:13:51Z
created
2023-04-12 05:33:44Z
changed

original description Smith, A. B. & Kroh, A. (eds.). (2011). The Echinoid Directory. World Wide Web electronic publication., available online at http://www.nhm.ac.uk/research-curation/projects/echinoid-directory
note: https://www.nhm.ac.uk/our-science/data/echinoid-directory/taxa/taxon.jsp?id=1566 [details]   

basis of record Smith, A. B. & Kroh, A. (eds.). (2011). The Echinoid Directory. World Wide Web electronic publication., available online at http://www.nhm.ac.uk/research-curation/projects/echinoid-directory [details]   
From editor or global species database
Taxonomic remark Triplacidiids are a group Camarodonta with:
- apical disc relatively small; monocyclic. Periproct subcircular with smooth edges (periproctal plates not indenting apical ring);
- ambulacra with echinid style compounding;
- primary tubercles in ambulacral and interambulacral zones similar; imperforate and obviously crenulate;
- peristome much larger than apical disc; no phyllodes and shallow buccal notches;
- Lantern unknown.

Apart from Triplacidia Smit & Kroh (2011) included a number of relatively poorly known fossil camarodont genera in this group (Eurypneustes, Gagaria, Mistechinus, Polyplacidia). A formal analysis of the group is missing so far and no formal family name has been established. The grouping has therefore been included as temporary name only in WoRMS. [details]

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