Useful Characters in Gastropod Phylogeny: Soft Information or Hard Facts?

Schänder, Christoffer; Sundberg, Per

doi:10.1080/10635150118712

Cited by 24 publications

(22 citation statements)

References 24 publications

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“…are not included) Warén described six new species, but retained more phylogenetic classification of pyramidellids. In contrast the indispensable value of using both anatomical and conchological characters for the classification of pyramidellids has been amply demonstrated in Wise (1996), Schander et al (1999b) and Schander & Sundberg (2001).…”

Section: Historical Surveymentioning

confidence: 99%

The Pyramidellidae (Gastropoda, Heterobranchia) of Norway and adjacent waters. A taxonomic review

Høisæter

2014

Fauna Norv.

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This monograph gives a taxonomic treatment of all 54 ‘species’ of Pyramidellidae reported from Norwegian and adjacent waters. Two species, Parthenina wikanderi n.sp.and Eulimella frielei n.sp., are described as new and three are ‘resurrected’ from synonymy. Nine previously described species are reported as new records for Norway, while three species are removed from the Norwegian fauna list. All species are illustrated with LM photographs (and, in a few cases, SEM photographs), and drawings of soft parts and operculae when available. An attempt is made to upgrade the generic taxonomy of the species included.

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Section: Historical Surveymentioning

confidence: 99%

The Pyramidellidae (Gastropoda, Heterobranchia) of Norway and adjacent waters. A taxonomic review

Høisæter

2014

Fauna Norv.

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“…Their shells vary dramatically in size, shape, sculpture (Goodfriend, 1986), and colour and banding pattern (Jones, Leith & Rawlings, 1977; Johnson, Murray & Clarke, 1993), both within and among species. Although shell variation can provide useful taxonomic characters (Schander & Sundberg, 2001; Jordaens et al ., 2009), levels of within‐species variation may in some cases exceed those between species or even within entire genera (Gould & Woodruff, 1978; Teshima et al ., 2003). In addition to highlighting the potential complexity of reproductive relationships among species distinguished by their shells, detailed studies of closely‐related groups of land snails, including Partula (Murray & Clarke, 1980), Cerion (Gould & Paull, 1977; Gould & Woodruff, 1978), and Ainohelix (Teshima et al ., 2003), have demonstrated the fine‐scale sampling required to distinguish among‐population variation from that distributed among reproductively isolated species.…”

Section: Introductionmentioning

confidence: 99%

Extreme, continuous variation in an island snail: local diversification and association of shell form with the current environment

Stankowski

2011

Biological Journal of the Linnean Society

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On Rosemary Island, a small continental island (11 km 2 ) in the Dampier Archipelago, Western Australia, snails of the genus Rhagada have extremely diverse morphologies. Their shells vary remarkably in size and shape, with the latter ranging from globose to keeled-flat, spanning the range of variation in the entire genus. Based primarily on variation in shell morphology, five distinct species are currently recognized. However, a study of 103 populations has revealed continuity of shell form within a very closely-related group. A phylogenetic analysis of specimens from Rosemary Island, and other islands in the Dampier Archipelago, indicates that much of the morphological variation has evolved on the island, from within a monophyletic group. Within the island, snails with distinct shell morphologies could not be distinguished based on variation in mitochondrial DNA or their reproductive anatomy. The shell variation is geographically structured over a very fine scale, with clines linking the extreme forms over distances less than 200 m. Although there is no evidence that the different forms have evolved in isolation or as a consequence of drift, there is a strong association between keeled-flat shells and rocky habitats, suggesting that shell shape may be of adaptive significance.

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“…3.1 below). While homeomorphy is a concern in other mollusk classes as well (e.g., Schneider (2001) on bivalves; Schander and Sundberg (2001) and Wagner (2001) on gastropods), it is perceived as especially common in J-K ammonoids, which can make it difficult to separate convergent evolution from shared ancestry. Strategies do exist, however, to address homeomorphy, and rather than assuming it a priori, homeomorphy should be demonstrated by phylogenetic analysis.…”

Section: Phylogenetic Analysesmentioning

confidence: 98%

Macroevolution and Paleobiogeography of Jurassic-Cretaceous Ammonoids

Yacobucci

2015

Topics in Geobiology

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Useful Characters in Gastropod Phylogeny: Soft Information or Hard Facts?

Cited by 24 publications

References 24 publications

The Pyramidellidae (Gastropoda, Heterobranchia) of Norway and adjacent waters. A taxonomic review

The Pyramidellidae (Gastropoda, Heterobranchia) of Norway and adjacent waters. A taxonomic review

Extreme, continuous variation in an island snail: local diversification and association of shell form with the current environment

Macroevolution and Paleobiogeography of Jurassic-Cretaceous Ammonoids

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