Useful Characters in Gastropod Phylogeny: Soft Information or Hard Facts

Schänder, Christoffer; Sundberg, Per

doi:10.1080/106351501750107576

Cited by 16 publications

(2 citation statements)

References 12 publications

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“…Adams, 1900Adams, , 1915Ortmaun, 1920), ami therefore potentiallv contrilinting homoplasv to phvlogenetic aualvses. Adtting solt anatomv characters to a studv such as this might tlieoreticallv impiovc the resolution ol the analvses, lint manv eharactei's lre(|ueutlv used to delineati' taxa van little among pleulocerids (Dazo, 1965) and in phvlogi'iietic reeonstnatious shell chaiacters often are less homoplastic than analoniic;il cluirai'ters i Schander and Sundberg, 2001).…”

Section: Discussloxmentioning

confidence: 99%

A cladistic analysis of Lithasia (Gastropoda: Pleuroceridae) using morphological characters

2002

The Nautilus.

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A cladistic anal\ sis of Lithasiii (Gastropoda: Pleuroceridae) using moiphological characters Russell L. Minion' IJcparlMiciit ol Bu)l()j;ii'al Siiciict's Uiii\ersih-ol' Alahanui Tuscaloosa. AI.354S7 USA ABSTRACT Till' fla.ssificatinii ol plciiroiinil snails ami otlirr Ircsliwatcr iiiolhisks has liistoricalK liccii hascd on inoipholo<;ic'al characters. Dcspiti-\cars ol ta\oiioiiiic work on plenroccrids. no sinijlc work inchides all rccm^ni/ed ta\a Ironi a u;i\cn tjronp anil onl\ a tew systematic treatments ol the lamiK' or indixidnal genera exist. Modi-rn methods ol ph\ loijenetic s\stematics ha\c shown that some moipholoi;ical traits do not support liistori-calK accepted mollusk classihcations. II anaKses ol nioqihological characters do snppoil ciuix-nt taxononiic li\potheses, then the classification ol tliesi-e;roups can lie tonsidered as stable. It not. our approach retjarding diagnostic cli.u'acters tor these groups must change. This paper uses 25 shell and radular characters in a cladistic anaKsis ol the pleurocerid genus Ijthasiu, and compares flie findings to prexionsK snggestt'd classifications ol the group. Cladistic anai\ses do not support an\ current or historical classification ol Litliiisiii. However, these moiphological characters are found to rongliK delineate IJthiisid and other extant pleurocerid genera, challenging pre\ious works that suggest such characters ha\e limited ntilitx. IXTKODUCTIOX HistoricalK. the i-lassific-atinii ot tresliwater iiKilhisks has relied lieaxiK on iiidiphdldgical features such as shell, soft anatoiiu', and reproiluetive .structures (e.g.. Tnou. LS73: Heard and Cuekert. 1970: Davis and Fuiler. 19S1; Burcli and Tottenham. 19S()). Thks is partieiilarK cxident for pleurocerid snaiks, win-re sliell features aec-ount tor the inajorit\' of diagnostii-characters used in the taxonomy and clas.sifieation ot the group. One grouji ol ph-iiroeerids that lias !)eeii clas.sified on the liasis of shell eharacti-rs is Lilliusid llaldeiiian. IS40. a genus ol large ri\'er snails loiind tlirongliout tlic ( 'nnilierland, Ohio. Mi.ssissippi, and Tennessee River drainages. Species of Lilliasia pos.sess eonie to o\ate-conic shells with tusiforin apertures, a posterior eallns on the parietal wall, and fre(|neiitl\ some degree ot sculpture on the hoiK whorl (linrcli. 19'S2). .Most species were tlescrihed initialK as Mcltinia. and classified according to shell eliaracteristics such as sliape and sculpture, llaldeiiian 'Current address: Department of /oologx. Iii\ei1el)rate l)i\isioii.

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Section: Discussloxmentioning

confidence: 99%

A cladistic analysis of Lithasia (Gastropoda: Pleuroceridae) using morphological characters

2002

The Nautilus.

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“…It has been proposed that shell characters are less important to establish phylogenetic relationships because their morphology is plastic in response to environmental factors and they are targets of intense selection pressure (Breure, 1979;Kool, 1993). In contrast, Schander & Sundberg (2001) and Collin (2003) concluded that there is no reason to exclude shell characters because they would be phylogenetically misleading factors. Similarly, Smith & Hendricks (2013) proposed that while the shell characters are more homoplasious Miranda, M.J.: Cladistic analysis of the Argentinian species of Bostryx than anatomical characters, they could still contribute to develop a phylogenetic hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Cladistic analysis of the Argentinian species of the genus Bostryx (Gastropoda, Stylommatophora) based on morphological evidence

Miranda

2016

Pap. Avulsos Zool.

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The genus Bostryx Troschel, 1847 is found exclusively in South America, from Ecuador to Chile and mainly in the Andes mountain range. The phylogeny of Argentinian species of Bostryx was based on morphological characters of 19 species from Argentina, 5 from Peru and 7 from Bostryx-related genera, belonging to Bulimulidae and Odontostomidae. A matrix of 31 taxa and 78 morphological characters (19 of which were continuous and 59 discrete) from shell, pallial and reproductive systems was analysed under implied weighting with TNT. Argentinian species of the genus formed a monophyletic group together with the Peruvian species. The monophyly of this clade was supported by a set of 14 synapomorphies, principally related to continuous characters of the shell shape.

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Meta-analysis of character utility and phylogenetic information content in cladistic studies of ammonoids

Yacobucci

2012

Geobios

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Useful Characters in Gastropod Phylogeny: Soft Information or Hard Facts

Cited by 16 publications

References 12 publications

A cladistic analysis of Lithasia (Gastropoda: Pleuroceridae) using morphological characters

A cladistic analysis of Lithasia (Gastropoda: Pleuroceridae) using morphological characters

Cladistic analysis of the Argentinian species of the genus Bostryx (Gastropoda, Stylommatophora) based on morphological evidence

Meta-analysis of character utility and phylogenetic information content in cladistic studies of ammonoids

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