Artículos de revistas
Morphological Development of the Radula of Four Species of the Neogastropod Family Muricidae
Fecha
2015-09Registro en:
Herbert, Gregory M.; Pío, María José; Pastorino, Roberto Santiago Guido; Harasewych, M. G.; Kantor, Yuri I.; et al.; Morphological Development of the Radula of Four Species of the Neogastropod Family Muricidae; Institute of Malacology; Malacologia; 58; 1-2; 9-2015; 323-336
0076-2997
2168-9075
CONICET Digital
CONICET
Autor
Herbert, Gregory M.
Pío, María José
Pastorino, Roberto Santiago Guido
Harasewych, M. G.
Kantor, Yuri I.
Lamy, Dominique
Pointier, Jean-Pierre
Resumen
Radular ontogenies of four species of the neogastropod family Muricidae are describedthrough comparisons of early post-metamorphic and adult developmental stages, with specificfocus on the rachidian (central) tooth. The degree of rachidian transformation during ontogenyvaries from minor shape change to addition or loss of structural features important forassigning taxa to subfamilies. Changes include: flattening of the rachidian base and a switchfrom a short, beak-like to a long, flattened central cusp in the rapanine Stramonita biserialis;a switch from variable, asymmetric to regular, symmetric expression of inner lateral denticlesin the basal muricid Timbellus phyllopterus; curvature of the rachidian base at the marginsand separation of the pointed base endpoint from the radular membrane to form a marginalcusp in the muricine Chicoreus dilectus; and moderate straightening of the rachidian basein the ocenebrine Vokesinotus perrugatus. From these observations and previous work, wepropose a plesiomorphic developmental sequence for the Muricidae and provide supportingevidence for the developmental origins of novel features of the muricid radula.