| Home> Miocene>

List species

Lamprocyrtis daniellae Caulet, 1986

Description - Add description

Two-segmented form with very small cephalis, open, with irregularly circular pores and a small apical spine arising gradually from the periphery of cephalic like a short beak. No accessory spines on the periphery of cephalic top. Collar stricture distinct. Thorax spindle-shaped, thick-walled, smooth with subcircular to irregular pores aligned in longitudinal rows. Thorax constricted distally, terminating in a peristome with an irregular row of strong irregular teeth.
Total length: 120-130µm. Maximum width: 70µm.
This morphotype is very similar to L. nigriniae (Caulet). with nearly the same shell. But the general shape and structure of the shell, the presence of a well-developed peristome, and the slightly developed apical spine are different. L. daniellae could be an ancestor of L. nigriniae and the L. heteroporos-L. nigriniae lineage may need to be revised. However, it is necessary to find evolutionary morphotypes between L. daniellae and L. nigriniae. As L. heteroporos is generally abundant in high-latitude sediments and L. nigriniae is restricted to the equatorial area, evolutionary morphotypes like L. daniellae must be found in mid-latitude sediments.
Caulet 1986











Discussion / Comments


Web links