Integrative taxonomy of Magilaoma, Pedicamista and Pasmaditta, with descriptions of one new genus and four new species from Tasmania (Stylommatophora: Punctoidea).

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος:	Integrative taxonomy of Magilaoma, Pedicamista and Pasmaditta, with descriptions of one new genus and four new species from Tasmania (Stylommatophora: Punctoidea).
Συγγραφείς:	Hyman I; Australian Museum Research Institute, Australian Museum, Sydney, NSW 2010, Australia.; School of Science, Western Sydney University, Penrith, NSW 2751, Australia., Bell B; Department of Humanities and Social Sciences, University of Tasmania, Hobart, Tas 7000, Australia., Bonham K; Tasmanian Museum and Art Gallery, Rosny, Tas 7018, Australia., Climo F; 5 Imlay Crescent, Wellington, Ngaio 6035, New Zealand.
Πηγή:	Invertebrate systematics [Invertebr Syst] 2026 Sep 30; Vol. 40 (9).
Τύπος έκδοσης:	Journal Article
Γλώσσα:	English
Στοιχεία περιοδικού:	Publisher: CSIRO Pub. in cooperation with Commonwealth Scientific and Industrial Research Organisation and Australian Academy of Science Country of Publication: Australia NLM ID: 101136361 Publication Model: Print Cited Medium: Internet ISSN: 1447-2600 (Electronic) Linking ISSN: 14455226 NLM ISO Abbreviation: Invertebr Syst Subsets: MEDLINE
Imprint Name(s):	Original Publication: Collingwood, Vic., Australia : CSIRO Pub. in cooperation with Commonwealth Scientific and Industrial Research Organisation and Australian Academy of Science, 2002-
Ιατρικοί όροι (MeSH):	Snails/classification , Snails/anatomy & histology , Snails*/genetics, Animals ; Phylogeny ; Tasmania ; Species Specificity ; Sequence Analysis, DNA
Περίληψη:	Context: Australian punctoids are a poorly known group of small to minute land snails with considerable undescribed diversity, especially in Tasmania. Very few studies to date have included anatomical and molecular data. Herein we address three endemic genera with varying degrees of reduced shell sculpture. Aims: Our aim was to comprehensively revise the systematics of the genera Magilaoma, Pedicamista and Pasmaditta, tiny punctoids of approximately 2-5 mm in shell width, using comparative morpho-anatomy and phylogenetic analyses of mitochondrial (COI, 16S) and nuclear (ELAVI8, ITS2) DNA. Taxa: Family Punctidae: Magilaoma, Pedicamista; Family Cystopeltidae: Pasmaditta. Methods and Key Results: We demonstrate that these taxa, while very similar and often misidentified as one another, form three independent lineages. The first lineage, made up of genera Magilaoma (excluding M. canobla) and Pedicamista along with new species, has a malleate protoconch, radula with reduced accessory cusps, and reproductive system with what appears to be an internalised epiphallus. We treat Pedicamista as a junior synonym of Magilaoma, redescribe M. penolensis (including new records from Western Australia) and M. coesa comb. nov. and introduce new taxa M. tasmanica sp. nov. and M. saxilitoralis sp. nov. For the second lineage, a single undescribed species most closely related to the Norfolk Island punctids, we introduce the name Gahniella undulata gen. et sp. nov. This arboreal species has a spirally lirate protoconch, reduced teleoconch ribs and distinct spiral microsculpture, and differs from Magilaoma in the presence of an epiphallus, a penis with only a short blind tip, and radular teeth with more elongate accessory cusps. The third radiation comprising two species diverges from within Cystopeltidae; this family placement is supported by an incomplete secondary ureter and a charopid-like rather than punctid-like radula. We redescribe Pasmaditta jungermanniae and introduce new species Pasmaditta genisys sp. nov. We also demonstrate that genus Planilaoma belongs to the family Cystopeltidae rather than Charopidae and introduce two new combinations for outgroup taxa, Planilaoma sitiens comb. nov. and Paralaoma canobla comb. nov. Conclusions: The secondary ureter and radula are confirmed as key characters distinguishing the families Punctidae and Cystopeltidae. The two punctid lineages addressed herein are differentiated by differences in protoconch and teleoconch sculpture, shell shape, the anatomy of the penial complex, and radula tooth shape.ZooBank: urn:lsid:zoobank.org:pub:400A738A-D887-4417-A89F-4A474A40DE73. (© 2026 The Author(s) (or their employer(s)). Published by CSIRO Publishing.)
Grant Information:	4-H03Z61B Australian Biological Resources Study
Contributed Indexing:	Keywords: Cystopeltidae; Gastropoda; Punctidae; anatomy; evolution; molecular phylogenetics; radula; shell sculpture; systematics
Entry Date(s):	Date Created: 20260929 Date Completed: 20260929 Latest Revision: 20260929
Update Code:	20260929
DOI:	10.1071/IS26005
PMID:	42808913
Βάση Δεδομένων:	MEDLINE

Περιγραφή
ISSN:	1447-2600
DOI:	10.1071/IS26005