liik
Echinospira pauciradiata Girotti, 1970
Taksoni kirjeldused
Girotti, 1970
Diagnosis: Rays of 30-40 cm in lengh, unbranched, provided with pinnulae on one side only and in number of 5-10 per cm of ray lengh. The pinnulae are longer toward the center half of radiolus and become gradually shorter toward the periphery of it, disappearing at the end, therefore the extremity of radiolus is without pinnulae. The edge of the single specimen, arranged in an elliptical spiral has therefore an accurate form. Within a 90° angle 4 to 8 radioli could be counted; their lenght/width ratio, in mm is 350:3,5. Further on the radioli seem to be joined together at the base a radially furrowed membrane. The general sharpe is that of more or less flattened cone.
Sünonüümika
1970 Echinospira pauciradiata sp. n. — Girotti , lk. 60, joon. Fig. 1-3
Klassifikatsioon
organismirühm | Biota |
ihnorühm | Ichnofossils |
Bioturbation trace fossils | |
perekond | Echinospira |
liik | pauciradiata |