Cardiomya minerva, Lima & Oliveira & Absalão, 2020

Lima, Tarcilla Carvalho De, Oliveira, Cléo Dilnei de Castro & Absalão, Ricardo Silva, 2020, Small, rare and little known: new records and species of Cardiomya (Bivalvia: Cuspidariidae) from Brazil, European Journal of Taxonomy 619, pp. 1-20: 11-13

publication ID

https://doi.org/10.5852/ejt.2020.619

publication LSID

lsid:zoobank.org:pub:BBB01195-73A4-44DB-8454-CC86B9C21EDF

DOI

http://doi.org/10.5281/zenodo.3795750

persistent identifier

http://treatment.plazi.org/id/B7AF183B-CE39-4084-A9B1-E0F366458513

taxon LSID

lsid:zoobank.org:act:B7AF183B-CE39-4084-A9B1-E0F366458513

treatment provided by

Valdenar

scientific name

Cardiomya minerva
status

sp. nov.

Cardiomya minerva   sp. nov.

urn:lsid:zoobank.org:act:B7AF183B-CE39-4084-A9B1-E0F366458513

Fig. 5 View Fig A–F

Diagnosis

Quadrangular shell flank, very short truncated rostrum, posterodorsal margin curved upwards, extending above the umbones; external sculpture composed of six posterior radial ribs, rostrum with commarginal growth lines only.

Etymology

This species is named after the character Minerva McGonagall, from the Harry Potter series of books written by the British J.K. Rowling. The name is employed as a noun in apposition.

Material examined

Holotype

BRAZIL – Alagoas state • [1i]; Maceió, Praia da Avenida ; 10 m depth; 10 Apr. 1990; IBUFRJ 5785.  

Other type material

PORTUGAL • [12v and fragments], syntypes of Cardiomya cadiziana Huber, 2010   [= replacement name for Cardiomya curta (Jeffreys, 1876)   ]; off Algarve ; 36°54′00″ N, 8°14′30″ W; 523–684 m depth; USNM 172032 GoogleMaps   • [ 5v], syntypes of Cardiomya cadiziana   ; São Pedro Canyon ; 39°55′00″ N, 9°56′00″ W; 1818 m depth; USNM 172033 GoogleMaps   • [ 4v], syntypes of Cardiomya cadiziana   ; São Pedro Canyon ; 39°42′00″ N, 9°43′00″ W; 1097–2003 m depth; USNM 172034 GoogleMaps   .

SURINAME • [1v], holotype of Cardiomya surinamensis van Regteren Altena, 1971   ; 06°22.5′ N, 55°10′ W; 20 m depth; RMNH.MOL.55387 GoogleMaps   .

Description

Shell small (length 4.3 mm; height 3.2 mm). Shell flank quadrangular, umbones raised. Anterodorsal margin forming a shoulder, anterior and ventral and margin rounded, little angulated. Rostrum very short, truncated, posteroventral sinuation shallow, posterodorsal margin curved upwards, extending

above the umbones. External sculpture of six radial ribs on the posterior half of the shell flank; rostrum with commarginal growth lines only.

Geographic distribution

Only known from the type locality.

Remarks

The most similar species to Cardiomya minerva   sp. nov. are Cardiomya surinamensis van Regteren Altena, 1971   ( Fig. 5 View Fig G–H) and Cardiomya cadiziana Huber, 2010   ( Fig. 5 View Fig I–J). These two species can be distinguished from Cardiomya minerva   sp. nov. by their trapezoidal shell flank, external sculpture composed of incomplete radial ribs on anterior region of the shell flank. Additionally, C. cadiziana   exhibits a shorter rostrum, with several faint radial lines, and straight posterodorsal margin, not extending above the umbones.