Conus restitutus (White, 1887)

 

 

Shell subfusiform; spire produced, slarply pointed, its sides gently concave, its lenght equal to about one-quarter of the full length of the shell; volutions about ten in number; the narrow portion of each one of them which is exposed in the spire, concavo-convex, the convex curve being below; upon the last volu­tion this convex portion forms an abrupt­ly rounded, or subangnlar shoulder at the periphery; sides of the shell below the spire, very long and gently convex ; aperture very narrow, obliquely truncated above, its width nearly uniform from end to end. Surface of the sides of the last volution marked by numerous shallow re­volving grooves, each bearing a raised line along its middle, the grooves being separated by plain flat spaces of equal width with the grooves. The surface of the volutions of the spire is marked by distinct lines of growth which sweep back­ward and upward by a short curve, from one suture to the next above.

Because of the imperfection of all the specimens of this species in the collection, its full proportional dimensions cannot be ascertained, but the producing the outlines of the gutta prrcha cast taken from a natural mould of the specimen from which figure 4 on plate X is drawn, the full length of the shell from apex to base appears to have been 40 millimeters. The height of the spire is 10 millimeters, and the greatest diameter of the last volution, 13 millimeters.

This species is only represented in the collection, by   some   natural    casts   of the interior of the shell, and a natural mould of the greater part of one example, the latter having served for the gutta-perecha cast before referred to. Its elongatd spire, and the notch in the posterior portion of the aperture, are the characteristics which have caused me to refer this species to the subgenus Conorbis (1).

 

 

Conus restitutus (2)

Fig. 7

Lower Miocene

Rio Pirabas

Conus restitutus

 

 


Bibliografia Consultata

 

·         (1) - White, C. A., 1887. Paleontology of Brazil; Comprising Descriptions of Cretaceous Invertebrate Fossils, Mainly from the Provinces of Sergipe, Pernambuco, Para and Bahia. Archivos do Museu Nacional do Rio de Janeiro, 7

·         (2) - Carlota Joaquina Maury “Fosseis Terciarios do Brasil com descripcao de novas formas Cretaceas”