A new species of Notocupes (Coleoptera: Archostemata) from the Lower Cretaceous (Albian) Jinju Formation in South Korea

Lee, Soo Bin; Nam, Gi Soo; Li, Yan‐Da

doi:10.1016/j.cretres.2022.105357

Cited by 5 publications

(5 citation statements)

References 40 publications

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“…We suppose that the contiguous procoxae reported by previous researchers could have been a taphonomic artefact caused by distortion during the fossilization processes. Indeed, the elongate prosternal process has also been inexplicitly noted by Ponomarenko (in Jarzembowski et al, 2015), and recently reported by Lee et al (2022).…”

Section: Remarkssupporting

confidence: 53%

Mesozoic Notocupes revealed as the sister group of Cupedidae (Coleoptera: Archostemata)

Li,

Tihelka,

Yamamoto

et al. 2023

Front. Ecol. Evol.

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Despite encompassing only about 50 extant species, beetles of the suborder Archostemata have a rich fossil history, being known from the Permian and dominating coleopteran assemblages in the Mesozoic before declining in richness towards the Late Cretaceous. Given the limited diversity of extant archostematans, fossils provide a valuable line of evidence for reconstructing the relationships among its constituent families. Here we re-evaluate the phylogenetic position of the Triassic–Cretaceous genus Notocupes, the most species-rich archostematan taxon in the fossil record. Exquisitely preserved fossils from the Middle Jurassic Haifanggou Formation (Daohugou; ~165 Ma) and mid-Cretaceous amber (~99 Ma) reveal critical differences from Ommatidae in the presence of separated procoxae and overlapping abdominal ventrites. Our analyses confirm that Notocupes is not a member of Ommatidae, but is closely related to Cupedidae. Our fossils reveal that Notocupes possessed unique adaptations for protecting their appendages, such as unusual dorsal pronotal grooves for the reception of antennae and epipleural grooves for the reception of legs, shedding light on ecological interactions in Mesozoic saproxylic habitats. The high similarity between Jurassic and Cretaceous Notocupes provides an exceptional example of long-term morphological stasis, suggesting a consistent microhabitat for the group.

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Section: Remarkssupporting

confidence: 53%

Mesozoic Notocupes revealed as the sister group of Cupedidae (Coleoptera: Archostemata)

Li,

Tihelka,

Yamamoto

et al. 2023

Front. Ecol. Evol.

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“…Kim et al, 2021; D.-C. Lee, 2018; S. B. Lee et al, 2022; Paik, 2005), spiders (Park et al, 2019), and vertebrates (Choi & Lee, 2017; Ha et al, 2022; K. S. Kim et al, 2020). Thus, subaerially exposed parts (during the deposition) of the Jinju Formation may preserve unnoticed egg fossils of amniotes, which preferred shallow lake deposits to a fluvial/alluvial environment, and future findings may be able to test this prediction.…”

Section: Discussionmentioning

confidence: 99%

“…However, terrestrial and semi-aquatic taxa and their traces have frequently been reported from the Jinju Formation, including insects (D.-Y. Kim et al, 2021;D.-C. Lee, 2018;S. B. Lee et al, 2022;Paik, 2005), spiders (Park et al, 2019), and vertebrates (Choi & Lee, 2017;Ha et al, 2022;K.…”

Section: Paleoecological and Paleoenvironmental Implicationsmentioning

confidence: 99%

Turtle eggs from the Lower Cretaceous Hasandong Formation (South Korea) with relict aragonite under significant thermal maturity

Choi

Kim

Paik

et al. 2022

Journal of Vertebrate Paleontology

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Unlike the eggshells of other amniotes, turtle eggshells are composed of aragonite, which is a metastable mineral. Turtle eggshells in the fossil record are therefore usually transformed to calcite. Geothermal heat also negatively affects the preservation of aragonite, and therefore the preservation of aragonite under geothermal settings is not usually expected. Here we report new turtle eggs from the Lower Cretaceous (Aptian–Albian) Hasandong Formation of South Korea, describing the morphological features of the eggs and eggshells. The eggs belong to an oogenus Testudoolithus with the smallest recorded egg size. As one of the oldest fossil eggs from Korea, this material fills a paleobiogeographic gap in the fossil record of turtle eggs in East Asia, which has limited records for the eggs of non-dinosaurian reptiles. More importantly, the presence of relict aragonite was cross-validated by electron backscatter diffraction and Raman spectroscopy. The Raman spectra of the thermally altered organic matter inside the eggshells indicated that the eggs experienced a maximum temperature of almost 260°C during their taphonomic history. This implies that aragonite can be preserved even under hostile thermal conditions and earlier reports of ‘calcite-only’ turtle fossil eggs may preserve undetected relict aragonite, which is only detectable via careful investigation using advanced microscopic techniques. The combined use of mineralogical and spectroscopic approaches adopted in this study may also be useful to invertebrate paleontology and archeology to further understand the relationship between the preservation of aragonite and the maximum paleotemperature that the materials experienced.

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“…However, in the illustrations by Ponomarenko (1966Ponomarenko ( , 1969, they appeared to have contiguous procoxae. In contrast, Notocupes has procoxae separated by the prosternal process (Lee et al, 2022;Li et al, 2023; but also see Strelnikova & Yan, 2023). Nevertheless, sometimes this character cannot be reliably determined from adpression fossils.…”

Section: Circumscription Of Genus Notocupesmentioning

confidence: 99%

New species of Notocupes (Coleoptera: Archostemata) from the Middle Jurassic Daohugou beds, with discussion on the generic circumscription

LI,

TIHELKA,

NEWTON

et al. 2023

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Exquisitely preserved fossils from the Middle Jurassic Haifanggou Formation (the Daohugou beds; ~165 Ma) and mid-Cretaceous Burmese amber (~99 Ma) are studied to clarify the external morphology of Notocupes. Three new species from Daohugou are described as N. spinosus sp. nov., N. robustus sp. nov., and N. daohugouensis sp. nov. Our examination of specimens from Burmese amber does not support the division of Notocupes into Notocupes s.s. and Echinocups. Therefore we treat Echinocups syn. nov. as a junior synonym of Notocupes, and N. ohmkuhnlei comb. rev., N. neli comb. rev. and N. denticollis comb. rev. are returned to Notocupes from Echinocups.

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A new species of Notocupes (Coleoptera: Archostemata) from the Lower Cretaceous (Albian) Jinju Formation in South Korea

Cited by 5 publications

References 40 publications

Mesozoic Notocupes revealed as the sister group of Cupedidae (Coleoptera: Archostemata)

Mesozoic Notocupes revealed as the sister group of Cupedidae (Coleoptera: Archostemata)

Turtle eggs from the Lower Cretaceous Hasandong Formation (South Korea) with relict aragonite under significant thermal maturity

New species of Notocupes (Coleoptera: Archostemata) from the Middle Jurassic Daohugou beds, with discussion on the generic circumscription

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