Revision of Sigaloeista Shea & Griffiths, 2010 (Helicarionidae: Gastropoda: Stylommatophora) from eastern Australia

ABSTRACT

Sigaloeista Shea & Griffiths, 2010 is a genus of small, litter-dwelling helicarionid snails that occurs in the rainforest and wet sclerophyll forest of northeastern New South Wales and southern Queensland. This group currently comprises three species known only from their shell morphology. We revise the taxonomy of this group using a comparison of key morphological features and mitochondrial genes COI and 16S, and describe four new species: Sigaloeista gracilis n. sp.; S. cavanbah n. sp.; S. dorrigo n. sp.; and S. ramula n. sp. Sigaloeista is unified by shared morphological characters including a small, glossy, discoidal shell of about 4.5 whorls, a body with a pronounced caudal horn and large, leaf-shaped shell lappets, and a reproductive system with a short vagina, absent epiphallic caecum, flagellum with internal cryptae and spermatophore with accessory spines.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:5D5D7603-06B2-4662-91BB-343E3BB5C4E8

KEYWORDS:

• Helicarionoidea
• land snail
• mitochondrial DNA
• morphology
• taxonomy

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Erratum

Acknowledgements

We thank Adnan Moussalli, Alison Miller, Daryl Potter, Francesco Criscione, John Stanisic, Mandy Reid and Michael Shea for providing material, for assistance with loans and for helping with fieldwork. We are grateful to Michael Shea for carrying out the anatomical drawings, and to an anonymous reviewer for constructive comments that greatly improved the manuscript.

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Isabel T. Hyman http://orcid.org/0000-0003-0044-5467

Frank Köhler http://orcid.org/0000-0001-7150-6509

Additional information

Funding

This work has been made possible through financial support from the Australian Biological Resources Study [ABRS grant RF215-49].