Gastropod egg capsules from the Lower Cretaceous of Russia preserved by calcitization

Zatoń, Michał; Mironenko, Aleksandr A.; Banasik, Kamila

doi:10.1016/j.palaeo.2016.11.048

Cited by 5 publications

(4 citation statements)

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“…On balance, we consider it more likely that the eggs within DIP-CH-17227 are gastropod eggs (slug or land snail) rather than anuran or insect eggs. Eggs from gastropods are rare within the Cretaceous fossil record, with only two published reports to date 35 ; we were unable to find any definitive reports from amber. Habitats for previous discoveries of gastropod eggs have included soft-shelled eggs in Jurassic and Cretaceous deltaic and marine deposits, and Miocene freshwater deposits, as well as calcareous eggs from land snails in the Paleogene and Neogene 35,36 .…”

Section: Discussionmentioning

confidence: 73%

Possible egg masses from amphibians, gastropods, and insects in mid-Cretaceous Burmese amber

et al. 2019

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The eggs of fish, amphibians, and many invertebrates are soft, delicate structures that are only rarely preserved in the fossil record. Here we report egg masses preserved as inclusions in mid-Cretaceous amber deposits of Myanmar. Of five specimens recovered, three of the egg masses probably pertain to insects, but the other two appear different. One mass is composed of relatively stiff eggs that retain their shape throughout the mass and may be linked by mucoid strands. This morphology resembles that of some terrestrial molluscs. The second mass is composed of softer eggs that have compressed one another so that their shapes are strongly distorted within the mass.These eggs most closely resemble those of amphibians. Given the forest environment reconstructed for the amber locality, the eggs were presumably attached on or close to the resin producing tree.

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Section: Discussionmentioning

confidence: 73%

Possible egg masses from amphibians, gastropods, and insects in mid-Cretaceous Burmese amber

et al. 2019

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“…Fossils of aquatic invertebrate eggs are generally rare [29][30][31][32][33][34][35] and little is known about their size variation owing to limited numbers of specimens and often poor preservation. Almost all reported fossil eggs of aquatic invertebrates have a simple rounded or ovoid shape without any plug or lid-covered opening.…”

Section: (B) Variation In Fossil and Extant Invertebrate Eggsmentioning

confidence: 99%

Morphological variation suggests that chitinozoans may be fossils of individual microorganisms rather than metazoan eggs

et al. 2019

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Chitinozoans are organic-walled microfossils widely recorded in Ordovician to Devonian ( ca 485–359 Mya) marine sediments and extensively used in high-resolution biostratigraphy. Their biological affinity remains unknown, but most commonly, they are interpreted as eggs of marine metazoans. Here, we provide new insights into their palaeobiology from three lines of inquiry. We examine morphological variation of a new, well-preserved Late Ordovician species, Hercochitina violana ; analyse a compiled dataset of measurements on 378 species representing all known chitinozoan genera; and compare these data with the size variation of eggs of both extinct and extant aquatic invertebrates. The results indicate that the magnitude of size variation within chitinozoan species is larger than observed in fossil and modern eggs. Additionally, delicate morphological structures of chitinozoans, such as prosome and complex ornamentation, are inconsistent with the egg hypothesis. Distinct and continuous morphological variation in H . violana is more plausibly interpreted as an ontogenetic series of individual microorganisms, rather than as eggs.

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“…Beside the below mentioned findings in the clay pit south of Buttenheim, fossil record of gastropod egg capsules is "extremely poor due to their low fossilization potential" (Zatoń and Mironenko 2015b, p. 1). The known findings include imprints on bivalve shells, on gastropod shells or on ammonite body chambers from the Lower Jurassic (Kaiser and Voigt 1977;Kaiser and Voigt 1983), the Upper Jurassic (Zatoń and Mironenko 2015b) or the Cretaceous (Zatoń et al 2013;Zatoń et al 2017) as well as one three-dimensional record in mid-Cretaceous amber (Xing et al 2021). To our knowledge, there are only two examples of pyritized gastropod eggs on driftwood (Riegraf and Schubert 1991;Schubert et al 2008).…”

Section: Introductionmentioning

confidence: 99%

A possible terrestrial egg cluster in driftwood from the Lower Jurassic (Late Pliensbachian) of Buttenheim (Franconia, Germany)

Scharfenberg¹,

Keupp²,

Schobert³

2022

ZITT

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Our paper shows several clusters of circular fossil egg capsules from the Franconian Amaltheenton Facies (Lower Jurassic, Upper Pliensbachian), mostly found in the clay pit south of Buttenheim. The egg capsules are scatteredly and irregularly arranged on various substrates like calcareous nodules, mollusk shells, or sunken driftwoods. Marine gastropods have been presumed as their producers spawning their eggs autochthonous. Only one specimen exhibits a regular honeycomb-like pattern of small pyritized eggs deposited seemingly within driftwood but originally lead in a small deadwood break. We interpret it as representing a possible allochthonous insect spawn drifted off from the about 70 km removed coastal region.

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Gastropod egg capsules from the Lower Cretaceous of Russia preserved by calcitization

Cited by 5 publications

References 40 publications

Possible egg masses from amphibians, gastropods, and insects in mid-Cretaceous Burmese amber

Possible egg masses from amphibians, gastropods, and insects in mid-Cretaceous Burmese amber

Morphological variation suggests that chitinozoans may be fossils of individual microorganisms rather than metazoan eggs

A possible terrestrial egg cluster in driftwood from the Lower Jurassic (Late Pliensbachian) of Buttenheim (Franconia, Germany)

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Gastropod egg capsules from the Lower Cretaceous of Russia preserved by calcitization

Cited by 5 publications

References 40 publications

Possible egg masses from amphibians, gastropods, and insects in mid-Cretaceous Burmese amber

Possible egg masses from amphibians, gastropods, and insects in mid-Cretaceous Burmese amber

Morphological variation suggests that chitinozoans may be fossils of individual microorganisms rather than metazoan eggs

﻿A possible terrestrial egg cluster in driftwood from the Lower Jurassic (Late Pliensbachian) of Buttenheim (Franconia, Germany)

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A possible terrestrial egg cluster in driftwood from the Lower Jurassic (Late Pliensbachian) of Buttenheim (Franconia, Germany)