Pelagomanes

Daughter taxa (time control age-window is: 0-800Ma)
				Pelagomanes cantharoides neptune records:
				Pelagomanes kozoi neptune records:
				Pelagomanes morawanensis neptune records:
				Pelagomanes stigi neptune records: 185

Taxonomy

Catalog entries: Pelagomanes

Original description: Description. Pelagomanes has a small cephalis in proportion to the thorax, compared to most other lophophaenid genera. The apical spine runs along the wall of the cephalis and extends upward as a horn with a slight curve at its base, before the spine reaches the apex of the cephalis. Although not present in every species of Pelagomanes, a very prominent—and sometimes forked—apical horn is typical. The ventral spine is thornlike in appearance; it tends to be broader at its base, giving it a triangular shape. The thorax is always wider and longer than the cephalis. Shoulders and ridges between them develop on the upper part of the thorax, and typically extend downwards as ribs that terminate as three feet or many teeth at the base of the thorax. Species in this genus do not have an axobate.  
Remarks. Here we have identified a complex of related species, which have been assigned (often questionably by their authors) to various genera within Lophophaenidae. The new genus Pelagomanes is similar to Ceratocyrtis in the proportions of cephalis and thorax, short median bar, and downward-angled dorsal spine. However, the lack of a dendritic axobate differentiates Pelagomanes from Ceratocyrtis. This genus differs from Lophophaena in the structure of ribs along the length of the thorax (usually terminating as feet) and relatively small cephalis compared to the size of the thorax. It differs from Lithomelissa in that the apical spine runs along the side of the cephalic wall rather than passing freely through it. The shape and proportions of the cephalis and thorax differentiate this genus from Amphiplecta, Arachnocorallium, Arachnocorys, Botryopera, and Peromelissa. The boundary between Pelagomanes and Pseudodictyophimus is problematic, as the latter genus is in need of a revision. At present, we consider Pseudodictyophimus to be different due to its shorter thorax and relatively longer feet. Pseudodictyophimus is limited to three feet in total, whereas Pelagomanes can have more, or have feet in addition to teeth at the base of the thorax. The strong apical spine with a hook-like curved base is also typical of Pelagomanes but not Pseudodictyophimus. The genus Cephaluspinus Alvira-Martìn, 1971 was regarded as a junior synonym of Lophophaena by Petrushevskaya (1981); Pelagomanes differs from both of these generic concepts in that the cephalis is relatively smaller, compared to the breadth of the thorax.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Calabrian Stage (100% up, 0.8Ma, in Calabrian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Lophophaenidae

Pelagomanes compiled by the radiolaria@mikrotax project team viewed: 12-5-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/bforams/index.php?id=206223 Go to Archive.is to create a permanent copy of this page - citation notes

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