The function of the glabellar ‘tubercle’ inNileusand other trilobites
- 1 January 1976
- journal article
- research article
- Published by Scandinavian University Press / Universitetsforlaget AS in Lethaia
- Vol. 9 (1) , 101-106
- https://doi.org/10.1111/j.1502-3931.1976.tb00954.x
Abstract
The glabellar ''tubercle'' of Nileus armadillo (Dalman) is an inverted funnel-shaped thinning in the cuticle, covered by the outer cuticular layer. Its structure is consistent with a function as a light-sensitive organ, whose angular range of light receptivity complements that of the lateral eyes. Median cephalic tubercles of most other trilobites are unlike that of Nileus and are different in structure and position; hence they are unlikely to have been homologous.This publication has 5 references indexed in Scilit:
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