CATALOG OF ORIGINAL DESCRIPTIONS: Lamptonium fabaeforme constrictum Riedel & Sanfilippo 1970

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: rads_cat -> L -> Lamptonium -> Lamptonium fabaeforme constrictum
Other pages this level: L. colymbus, L. fabaeforme chaunothorax, L. fabaeforme constrictum, L. incohatum, L. obelix, L. pennatum, L. sanfilippoae

Lamptonium fabaeforme constrictum

Citation: Lamptonium fabaeforme constrictum Riedel & Sanfilippo 1970
Rank: sub-species
Type specimens: pl.5, fig.7
Described on page(s) : p.523
Family (traditional): Theoperidae
Family (modern): Theocotylidae

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Current identification/main database link: Lamptonium fabaeforme constrictum Riedel & Sanfilippo 1970


Original Description
Generally similar to the nominate subspecies [see description herein], but differing in that at the base of the narrow part of the thorax is a constriction which is, however, not accompanied by an internal septal ring. The horn is often long, and in some specimens, twisted spirally.

Length excluding horn 185-275 µ; of cephalothorax 160-235 µ. Maximum breadth 125-190 µ. Distinguishing characters (rw): L. f. constrictum is distinguished from other members of the lineage by its robust horn and the constricted upper part of the thorax, and from L. sanfilippoae by not being closed distally. (Sanfilippo et al., 1985) Phylogeny (rw): L. f. constrictum terminates the lineage that began with L. pennatum.

Editors' Notes
The cephalis is enclosed in the base of the very long (up to 210 microns), robust, bladed, sometimes twisted horn. The base of the narrow part of the thorax is constricted to a varying degree, but does not have an internal segmental division. (Sanfilippo et al., 1985)
assemblages from the Indian Ocean at DSDP Site 220, but not further south, at DSDP Sites 313 and 40 in the Pacific, and in the Gulf of Mexico, but not in the open Atlantic Ocean.

References:

Riedel, W. R. & Sanfilippo, A. (1970). Radiolaria, Leg. 4 DSDP. Initial Reports of the Deep Sea Drilling Project. 4: 503-575. gs

Riedel, W. R. & Sanfilippo, A. (1973). Cenozoic radiolaria from the Caribbean, Deep Sea Drilling Project, Leg 15. Initial Reports of the Deep Sea Drilling Project. 15: 705-751. gs


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Lamptonium fabaeforme constrictum compiled by the radiolaria@mikrotax project team viewed: 27-2-2021

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