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Cancellaria (Bivetiella) lugogonzalezorum
Taxonomy
Cancellaria (Bivetiella) lugogonzalezorum was named by Landau et al. (2007). Its type specimen is MOBR-M-3361, a shell, and it is a 3D body fossil. Its type locality is Cantaure Formation (unspecified localities), which is in a Burdigalian transition zone/lower shoreface siliciclastic in the Cantaure Formation of Venezuela.
Sister species lacking formal opinion data
C. acuta, C. ancycla, C. bifasciata, C. bifasciatum, C. contorta, C. druidarum, C. eucheea, C. euclethra, C. hartti, C. mitrodita, C. paramoorei, C. picta, C. pirabensis, C. praeindentata, C. pristina, C. sanctifrancisci, C. spherotopleura, C. springvalenensis, C. stibara, C. subtilicancellata, C. tritonoidea, C. waltoniana, C. yonabaruensis, C. zitteli, C. peninsularis, C. decussata, C. crassidiformis, C. atraktoides, C. sphenoidostoma
Synonymy list
| Year | Name and author |
|---|---|
| 2007 | Cancellaria (Bivetiella) lugogonzalezorum Landau et al. |
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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.
†Cancellaria (Bivetiella) lugogonzalezorum Landau et al. 2007
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. Landau et al. 2007 | Shell small, solid, ovate, with a fine mesh reticulate sculpture, the axial component slightly stronger. Protoconch consists of about three smooth, strongly convex whorls, with a small nucleus. Junction with teleoconch sharply delimited by a prosocline scar. Teleoconch consists of four convex whorls, with the periphery at the abapical suture. Suture deeply impressed and narrowly canaliculated. Sculpture consists of prosocline rounded axial rib, about half the width if their interspaces, 9–14 on the first teleoconch whorl, 17–22 on the penultimate. Weakly developed varices present at about 120° intervals. Spiral sculpture consists of rounded spiral cords, about half the width if their interspaces, three on the first teleoconch whorl, 5–6 on the penultimate. The two adapical cords on the later adult whorls are more closely set than the remaining cords. The spiral sculpture overrides the axial ribs forming small tubercles at the intersections. Whorl surface covered by fine prosocline growth lines. Last whorl strongly inflated, regularly convex, with 12–14 spiral cords above the siphonal fasciole, about 35 axial ribs and moderately constricted behind the fasciole. Aperture approximately 50% of total height, sub-oval and elongate. Outer lip simple, not thickened by labial varix, slightly flared abapically, strongly prosocline in profile, stromboid notch absent. Lip with a crenulate edge, bearing six strong denticles a short distance inside the lip, which continue as lirae within. Anal canal poorly developed; siphonal canal short, narrow and slightly recurved. Columella bears three bifid folds, the adapical fold largest. Parietal callus thin, adherent onto the ventral aspect of the last whorl, the whorl sculpture visible through the callus. Columella callus thicker, detached forming the medial wall of the umbilical chink. Siphonal fasciole well developed, rounded and elevated, bearing three cords. Umbilical chink relatively wide for genus. |