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Concavoleda braulense

Bivalvia - Nuculanida - Malletiidae

Taxonomy
Concavoleda braulense was named by Sanchez (1999). Its type specimen is CEGH-UNC 16714a, a shell (One internal mold of right valve), and it is a 3D body fossil. Its type locality is south side of the Quebrada La Pola, Eastern flank of Sierra de Villicum, which is in a Caradoc marine conglomerate in the La Cantera Formation of Argentina. It is the type species of Concavoleda.

Synonymy list
YearName and author
1999Concavoleda braulense Sanchez figs. 7.14-7.16, 9

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
RankNameAuthor
Eubivalvia
subclassProtobranchia(Pelseneer 1889)
superorderNuculaniformiiCarter et al. 2000
orderNuculanida(Carter et al. 2000)
superfamilyNuculanoideaAdams and Adams 1858
familyMalletiidae(Adams and Adams 1858)
genusConcavoleda
speciesbraulense

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Concavoleda braulense Sanchez 1999
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Diagnosis
ReferenceDiagnosis
T. M. Sanchez 1999Malletidae with shell outline of nuculanid type; anterior and posterior hinge teeth with concavities of chevrons towards umbo (concavodont dentition).

Ovate, anteroposteriorly elongated shell, of nuculanid-shape outline; orthogyrate umbo placed in anterior half of valve; anterodorsal margin ventrally arched, posterodorsal margin slightly curved to straight; anterior margin rounded, posterior half of valve gently acute; anterior adductor muscle scar broad, ovate, with major axis perpendicular to hinge-plate; posterior adductor muscle scar ovate, slightly impressed; pallial line with gently curved pallial sinus (Figs. 7.14, 9); anterior and posterior concavodont teeth, meeting by very small elements below umbo; ornamentation of concentric lirae, apparently crossed by very fine radial lines.
Measurements
partNmeanminimummaximummedians.d.
valve height22.482.202.802.500.424

Composition: aragonitec
Locomotion: facultatively mobilesuperf
Life habit: infaunalsuperf
Diet: deposit feedersuperf
Vision: blindc
Created: 2009-09-09 13:26:01
Modified: 2009-09-09 15:26:01
Source: superf = superfamily, c = class
References: Aberhan et al. 2004, Sanchez Roig 1926

Age range: Caradoc or 458.40000 to 449.50000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Caradoc458.4 - 449.5Argentina (San Juan) Concavoleda braulense (type locality: 13513)