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†class Helcionelloida Peel 1991 (mollusk)

PaleoDB taxon number: 7847

Parent taxon: Mollusca according to T. Wotte 2006

Sister taxa: Acaenoplax, Acevina, Actinoconus, Aculopileus, Acutirostriconus, Aldanolina, Algomella, Anisomyaria, Aplacophora, Aulacotrochus, Aviculocephaloconus, Bagenoviella, Beroides, Bisulcus, Bivalvia, Calyptoptomatida, Cambroscutum, Caudofoveata, Centriconus, Cephalopoda, Chiton cottae, Codonoconus, Conchifera, Conchula, Corystos, Crestoconus, Cyrtostoma, Dingus, Diplacophora, Dysmea, Dysnoetopla, Ebianella, Eosoconus, Gastropoda, Granoconus, Gutticonus, Hamatoconus, Hemithecellitina, Huangshandogoconus, Huangshandongoconus, Hubeinella, Kaschkadakia, Katunioides, Kepinospira, Khairkhaniidae, Khairkhaniiformes, Kimberella, Kraikchania, Kuanchuanella, Ladamarekiidae, Laticonus, Liantuoconus, Ligyrokala, Mackenziella, Maikhanellidae, Makarakia, Merismoconcha, Minymerisma, Miozonites, Nothamusium, Odontogriphus, Omalenlina, Palaeacmaea, Paragastropoda, Parascenella, Patelliconidae, Peotoconus, Pichynella, Polytropis, Porcaconus, Proconus, Protodrepanostoma, Pseudomatthevia, Rostroconchia, Sargaella, Scamboscamna, Scaphopoda, Scenellopsis, Serialia, Shabaktiella, Sichuanospira, Sinuconus, Solandangella, Solenogastres, Songlingella, Spatuloconus, Stenothecella, Stenothecoida, Sulcocarina, Tentaculita, Tergomya, Trunctoconus, Tuberoconus, Xilingxiaconus, Xinnanospira, Yangtzemerisma

Subtaxa: Beshtashella, Ceratoconidae, Emargimantus, Helcionellida, Helcionelliformes, Michniakia, Pelagiellida, Rostroconus

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Ecology: slow-moving low-level epifaunal detritivore