CATALOG OF ORIGINAL DESCRIPTIONS: Podocyrtis acalles Sanfilippo & Riedel 1992

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 -> P -> Podocyrtis -> Podocyrtis acalles
Other pages this level: P. acalles, P. aculeata, P. aegles, P. aerostatica, P. amphiacantha, P. ampla, P. ampla fasciolata, P. apeza, P. aphorma, P. argulus, P. argus, P. attenuata, P. bicornis, P. brevipes, P. brevipes jh, P. centriscus> >>

Podocyrtis acalles

Citation: Podocyrtis acalles Sanfilippo & Riedel 1992
Rank: species
Type specimens: pl.3, figs.2-5
Described on page(s) : p.12
Family (traditional): Pterocorythidae
Family (modern): Pterocorythidae

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Current identification/main database link: Podocyrtis acalles Sanfilippo & Riedel 1992


Original Description
Three-segmented pterocorythid with a broad-based vaguely lobed cephalis, bearing a short bladed horn. The lateral lobes of the cephalis have small irregular pores. Thorax campanulate, with pores in rows separated by longitudinal ridges. Lumbar stricture marked on the external contour by a slight indentation. Abdomen approximately the same length as the thorax, cylindrical to slightly inflated, terminating in a broad hyaline peristome bearing three wide shovel-shaped feet. The abdominal pores are slightly larger than the thoracic ones, in later forms arranged in rows separated by longitudinal ridges. Earlier forms tend to have abdominal pores that are irregular in size and arrangement but with some development of discontinuous ridges.

Based on 40 specimens. Length (excluding horn), 170-240 µ; length of cephalothorax, 90-115 µ; width of thorax 85-115 µ; width of abdomen 90-130 µ. Distinguishing characters (rw): This species is transitional between Podocyrtis (P.) papalis and P. (Lampterium) sinuosa. It is distinguished from P. papalis by the presence of a slight external lumbar stricture, and from P. sinuosa by the proportion of thoracic length to abdominal length (1:1 in the former, and 1:1.5 to 1:3 in the latter). Phylogeny (rw): The evolutionary transition of P. acalles to P. sinuosa occurs in the Theocotyle cryptocephala Zone.

Etymology: Greek akalles = without charms

References:

Sanfilippo, A. & Riedel, W. R. (1992). The origin and evolution of Pterocorythidae (Radiolaria): A Cenozoic phylogenetic study. Micropaleontology. 38(1): 1-36. gs

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Podocyrtis acalles compiled by the radiolaria@mikrotax project team viewed: 25-1-2021

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