A new genus of Insecta based on egg structure from the Late Cretaceous Klikov Formation of the Czech Republic

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F25%3A10137136" target="_blank" >RIV/00023272:_____/25:10137136 - isvavai.cz</a>

Result on the web

<a href="https://publikace.nm.cz/periodicke-publikace/journal-of-the-national-museum-prague-natural-history-series/194-1/a-new-genus-of-insecta-based-on-egg-structure-from-the-late-cretaceous-klikov-formation-of-the-czech-republic" target="_blank" >https://publikace.nm.cz/periodicke-publikace/journal-of-the-national-museum-prague-natural-history-series/194-1/a-new-genus-of-insecta-based-on-egg-structure-from-the-late-cretaceous-klikov-formation-of-the-czech-republic</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37520/jnmpnhs.2025.011" target="_blank" >10.37520/jnmpnhs.2025.011</a>

Result language

angličtina

Original language name

A new genus of Insecta based on egg structure from the Late Cretaceous Klikov Formation of the Czech Republic

Original language description

A new genus Regentus gen nov. is established here based on species originally described as Spirellea trebecensis, hence the new combination Regentus trebecensis (Knobloch et Mai,1986) comb. nov.. The material was collected and prepared by E. Knobloch from the Klikov Formation, fluvial lacustrine sediments of upper Turonian - Santonian age, located in the South Bohemian Basins, Czech Republic. Regentus trebecensis fossils are broadly elliptical in outline, hollow inside, with a ribbed surface. Their apical end shows ridges rather irregularly arranged, pointing towards the tip; the ridges on the basal end form a rather irregular star-shaped structure. The wall of the fossil shows regular perforations arranged in two parallel rows leading from the inside to the surface. Regentus trebecensis was originally described as a seed, related to recent Stemonaceae Caruel. R. trebecensis resembles Stemonaceae seeds in shape and longitudinally ribbed surface. However, R. trebecensis lack an aril and uniseriate or vesicular hairs originating from hilum, raphe or micropyle, the characteristic for Stemonaceae seeds. The presence of perforation in the fossil wall precludes its interpretation as a fruit or seed. The shape and structure of the perforations resemble aeropyles of insect eggs, particularly the air-containing meshwork of insect eggs (e.g. Phasmatodea, Lepidoptera); this reason led us to interpret the studied fossils as insect eggs. The diversity of insect eggs resembling seeds is high, although no insect group with features exactly matching the fossil material has yet been identified.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10506 - Paleontology

Project

<a href="/en/project/GF23-05142K" target="_blank" >GF23-05142K: The Late Cretaceous Flora of South Bohemia</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the National Museum (Prague), Natural History Series

ISSN

1802-6842

e-ISSN

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Volume of the periodical

194

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

11

Pages from-to

183-193

UT code for WoS article

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EID of the result in the Scopus database

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