Description of Four New Species of Ledella Verrill and Bush, 1897 (Pelecypoda: Nuculanidae) Off the Coast of Brazil, Using a Morphometric Approach

Viegas, Diniz Correa Paone; Benaim, Natalia Pereira; Absãlo, Ricardo Silva

doi:10.4003/006.032.0201

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…Kristensen & Christensen, 1989; Rolán, 1991; Ward et al ., 1997; Absalão & Santos, 2004; Miranda & Cuezzo, 2014) and in Bivalvia (e.g. Kilgour et al ., 1990; Benaim & Absalão, 2011; Viegas et al ., 2014). The use of this approach applied to the class Scaphopoda has increased since Shimek (1989) proposed the first indices based on measurements of the shell accompanied by statistical evaluation.…”

Section: Introductionmentioning

confidence: 99%

Morphometry of the shell in Scaphopoda (Mollusca): a tool for the discrimination of taxa

Souza

Caetano

2020

J. Mar. Biol. Ass.

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The alpha taxonomy of scaphopods is based mainly on the shell morphology, as it is for most molluscs. In the last three decades, the employment of morphometric variables of the shell in combination with statistics has considerably increased to aid species discrimination, but this has not been used above species level. In this study, a traditional morphometric approach was used to distinguish congeners, genera and families within the orders Dentallida and Gadilida. We studied 28 species of scaphopods from Brazil, belonging to 12 genera and five families. Twelve morphometric variables were measured, and a correlation test was done to select a set of variables without correlation as input data to perform a discriminant analysis. In the analysis of congeners, the discrimination power was high in both orders. Among the genera studied, the robustness of the analysis was drastically reduced in Dentaliida, while Gadilida maintained a high percentage of correct classifications. At the family level, both orders presented high percentages of correct classification, but the imbalance of cases for each taxon masks an inconsistent result. Based on our results, the morphometric approach was a useful tool to discriminate congeneric species of both orders and to discriminate the genera of Gadilida.

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Section: Introductionmentioning

confidence: 99%

Morphometry of the shell in Scaphopoda (Mollusca): a tool for the discrimination of taxa

Souza

Caetano

2020

J. Mar. Biol. Ass.

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Checklist of marine Bivalvia (Mollusca) from Brazil, with descriptive analyses of their bathymetric and geographical distribution

PASSOS,

BATISTÃO,

LIMA

2024

Zootaxa

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After revising the literature and consulting the pertinent virtual databases, we here list all Brazilian marine bivalves currently considered as valid and include data on their geographical and bathymetrical distribution. The list contains 516 indigenous and nine introduced species. Among the former, 461 species are autobranchs and 64 are protobranchs. They belong to 42 superfamilies, nine of them containing at least 20 species each; there are 77 families, twelve of which contain at least 15 species; most of these more speciose groups are typical from shallow waters (e.g., Tellinoidea and Veneroidea) and/or have been reviewed taxonomically (Nuculanoidea and Cuspidarioidea). There are 368 species which live exclusively on the continental shelf, 86 are only known from deep water and 68 species have a wide bathymetric distribution. More than half of the 368 continental-shelf species have a wide geographic distribution; 40 species are exclusive to the Brazilian province, the others also occur in the Caribbean and/or Argentine shelf waters; those from the Caribbean need more investigation. Important knowledge gaps remain for Brazilian Galeommatoidea and Nuculoidea, deep-sea species of Mytilidae, Teredinidae, and Arcidae; the Poromyidae, Limopsidae, Propeamussiidae, and Thyasiridae appear to be underrepresented. Compared to 29 world regional faunas of marine bivalves, the Brazilian diversity ranks in the ninth position.

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Description of Four New Species of Ledella Verrill and Bush, 1897 (Pelecypoda: Nuculanidae) Off the Coast of Brazil, Using a Morphometric Approach

Cited by 2 publications

References 25 publications

Morphometry of the shell in Scaphopoda (Mollusca): a tool for the discrimination of taxa

Morphometry of the shell in Scaphopoda (Mollusca): a tool for the discrimination of taxa

Checklist of marine Bivalvia (Mollusca) from Brazil, with descriptive analyses of their bathymetric and geographical distribution

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