Integrative taxonomy of the Clavus canalicularis species complex (Drilliidae, Conoidea, Gastropoda) with description of four new species

The conoidean family Drilliidae Olsson, 1964 is a species-rich lineage of marine gastropods, showing a high degree of diversification in comparison to other families of Conoidea. Despite intensive molecular phylogenetic studies during the last decade that have led to notable rearrangements of conoid...

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Bibliographic Details
Published in:Molluscan research 2020-07, Vol.40 (3), p.251-266
Main Authors: Fedosov, A. E., Puillandre, N.
Format: Article
Language:English
Subjects:
Animal biology
Biodiversity
Clavus
Conoidea
cytochrome c oxidase subunit I
Drilliidae
Fossils
Gastropoda
Invertebrate Zoology
Life Sciences
Marine molluscs
New species
Nodules
Phylogeny
Shells
species complex
Spines
Statuary
Systematics
Systematics, Phylogenetics and taxonomy
Taxonomy
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Summary:The conoidean family Drilliidae Olsson, 1964 is a species-rich lineage of marine gastropods, showing a high degree of diversification in comparison to other families of Conoidea. Despite intensive molecular phylogenetic studies during the last decade that have led to notable rearrangements of conoidean systematics, the genus- and species-level taxonomy of Drilliidae has not thus far been affected and remains entirely based on shell features. In the current study we revisit species delimitation in a morphological cluster of species from the Indo-Pacific referred to as the Clavus canalicularis complex, using an integrative taxonomy approach. The species in the complex possess robust thick-walled shells typically over 15 mm in height with sculpture of prominent rounded nodules located at the whorl's shoulder, sometimes sharp and squamiform, or producing long spines. We find that in addition to five known species, the complex comprises four new species. These are described as Clavus brianmayi n. sp. (New Caledonia), Clavus davidgilmouri n. sp. (the Philippines), Clavus andreolbrichi n. sp. (Vanuatu and New Ireland) and Clavus kirkhammetti n. sp. (Madagascar). Clavus exasperatus (Reeve, 1843), which was previously considered widely distributed in Indo-Pacific, is shown to be confined to the western Indian Ocean.
ISSN:1323-5818
1448-6067
DOI:10.1080/13235818.2020.1788695