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Lower Heterobranchia

{{Short description|Infraclass of molluscs}}

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Architectonicoidea

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| taxon = Lower Heterobranchia

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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.WoRMS (2020). "Lower Heterobranchia". Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1054700 on 2020-05-16

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.{{Cite web|url=http://www.molluscsoftasmania.net/Subclass%20pages/Heterobranchia.html|title = Molluscsoftasmania.net}}

File:Bactroptyxis trachaea 041811.jpg, family Nerineidae, superfamily Nerineoidea.]]

File:Valvata piscinalis.png, family Valvatidae, superfamily Valvatoidea.]]

Taxonomy

= 2005 taxonomy =

In the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005,{{Bouchet 2005}} the Lower Heterobranchia is an Informal Group. Superfamilies within the Lower Heterobranchia include:

(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) have redefined major groups within the Heterobranchia: they moved Glacidorboidea and Pyramidelloidea to Panpulmonata.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|doi-access=free}}.

= 2014 taxonomy =

Wägele et al. (2014):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}} moved Rissoelloidea and Acteonoidea from Lower Heterobranchia to Euthyneura.

= 2016 taxonomy =

Kano et al. (2016):{{Cite journal| doi = 10.1038/srep30908| pmid = 27498754| issn = 2045-2322| volume = 6| pages = 30908| last1 = Kano| first1 = Yasunori| last2 = Brenzinger| first2 = Bastian| last3 = Nützel| first3 = Alexander| last4 = Wilson| first4 = Nerida G.| last5 = Schrödl| first5 = Michael| title = Ringiculid bubble snails recovered as the sister group to sea slugs (Nudipleura)| journal = Scientific Reports| date = 2016-08-08| pmc = 4976385| bibcode = 2016NatSR...630908K}} moved Ringiculoidea from Lower Heterobranchia to Euthyneura.

So the following taxa remain within the Lower Heterobranchia:

References

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