Group of molluscs
Lower Heterobranchia , also known as the Allogastropoda , is a group of rather specialized, highly evolved sea slugs and sea snails , (marine gastropod mollusks ) within the subclass Heterobranchia . [ 1]
Although the great majority of Lower Heterobranchs are indeed marine, a few have succeeded in making the transition to freshwater .
Description
The shell shapes in this group are typically those that are seen in the sundial, pyramid, rissoella and orbitestellid families of snails.[ 2]
Bactroptyxis trachaea Nerineidae , superfamily Nerineoidea .Valvata piscinalis Valvatidae , superfamily Valvatoidea .
Taxonomy
2005 taxonomy
In the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 ,[ 3]
(Taxa that are exclusively fossil are indicated with a dagger †)
For a more detailed taxonomy see: Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)#Informal group "Lower Heterobranchia" (= Allogastropoda)
2010 taxonomy
Jörger et al. (2010)[ 4] redefined major groups within the Heterobranchia : they moved Glacidorboidea and Pyramidelloidea to Panpulmonata .[ 4]
2014 taxonomy
Wägele et al. (2014):[ 5] Rissoelloidea and Acteonoidea from Lower Heterobranchia to Euthyneura .
2016 taxonomy
Kano et al. (2016):[ 6] Ringiculoidea from Lower Heterobranchia to Euthyneura .
So the following taxa remain within the Lower Heterobranchia:
References
^ a b WoRMS (2020). "Lower Heterobranchia". Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1054700 on 2020-05-16
^ "Molluscsoftasmania.net" .^ Bouchet, Philippe ; Rocroi, Jean-Pierre ; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston ; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families ". Malacologia 47 (1– 2). Hackenheim, Germany: ConchBooks: 1– 397. ISBN 3-925919-72-4 ISSN 0076-2997 .^ a b Jörger K. M., Stöger I., Kano Y., Fukuda H., Knebelsberger T. & Schrödl M. (2010). "On the origin of Acochlidia and other enigmatic euthyneuran gastropods, with implications for the systematics of Heterobranchia". BMC Evolutionary Biology 10 : 323. doi :10.1186/1471-2148-10-323 .
^ Wägele H., Klussmann-Kolb A., Verbeek E. & Schrödl M. (2014). "Flashback and foreshadowing—a review of the taxon Opisthobranchia". Organisms Diversity & Evolution 14 (1): 133–149. doi :10.1007/s13127-013-0151-5
^ Kano, Yasunori; Brenzinger, Bastian; Nützel, Alexander; Wilson, Nerida G.; Schrödl, Michael (2016-08-08). "Ringiculid bubble snails recovered as the sister group to sea slugs (Nudipleura)" . Scientific Reports . 6 : 30908. Bibcode :2016NatSR...630908K . doi :10.1038/srep30908 . ISSN 2045-2322 . PMC 4976385 PMID 27498754 .
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