radiolaria - rads_cat - Dictyospyris melissium

radiolaria - rads_cat - Dictyospyris melissium radiolaria - rads_cat - Dictyospyris melissium

CATALOG OF ORIGINAL DESCRIPTIONS: Dictyospyris melissium Sanfilippo & Riedel 1973

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 -> D -> Dictyospyris -> Dictyospyris melissium

Other pages this level: D. anthophora, D. biloba, D. biporata, D. ceratospyris [nomen nudum], D. clathrus, D. discus, D. distoma, D. enneastoma, D. fenestra, D. gigas, D. hexastoma, D. mammillaris, D. melissium, D. meneghinii, D. messanensis, D. polystoma, D. quadriloba, D. reticulata, D. sphaera, D. spinulosa, D. stalactites, D. tetrastoma, D. tridentata, D. trilobata, D. triomma, D. tristoma, D. uniporata

Dictyospyris melissium Sanfilippo and Riedel 1973a.jpg

Dictyospyris melissium

Citation: Dictyospyris melissium Sanfilippo & Riedel 1973

taxonomic rank: species

Described on page(s) : p.527

Type specimens: pl.17, figs.1,2,

Current identification/main database link: Dictyospyris melissium Sanfilippo & Riedel 1973

Original Description

Shell discoidal, very variable in size and irregularity of outline, complexly subdivided by internal structures. Externally the shell is formed of a lattice plate with numerous small, circular to subeircular pores. Near the center of one surface of the disc is a larger pore. toward which is directed an internal thorn. Interior of shell traversed by numer-ous, delicate and robust, transverse and oblique (sometimes anastomosing) rods, except for a small central area evident in some specimens as a two or three-lobed cavity. This cavity and the internal thorn directed toward the larger pore indicate that this form is an acanthodesmiid, but the complexity of the internal structures prevents our being able to determine which bars are parts of the sagittal ring or collar structures.

Size:

Based on 20 specimens from 94-29, CC; 94-30-1; and 94-30-2. Diameter of disc 125-250 µ. Maximum width of inter-nal cavity 35-60 µ.

Etymology:

The specific name (melission, honeycomb) is used as a noun in apposition.

Editors' Notes

Because it has not been possible to determine the nature of the sagittal ring, nor the phylogenetic development of this species, its assignment to Dictyospyris is very tentative. There is some resemblance to Psychospyris, in the honeycomb-like internal structure of the peripheral part of the disc, but D. melissium has a much smaller internal cavity than the members of that genus, and its stratigraphic range is clearly prior to the origin of the Psychospyris lineage.[comment from RadWorld database]

References:

Sanfilippo, A. & Riedel, W. R. (1973). Cenozoic Radiolaria (exclusive of theoperids, artostrobiids and amphipyndacids) from the Gulf of Mexico, Deep Sea Drilling Project Leg 10. Initial Reports of the Deep Sea Drilling Project. 10: 475-608. gs O

Dictyospyris melissium compiled by the radiolaria@mikrotax project team viewed: 15-10-2024

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