A new red alga preserved with possible reproductive bodies from the 518‐million‐year‐old Qingjiang biota

Li, Rui‐yun; Cui, Linhao; Fu, Dongjing; Zhang, Xing‐liang

doi:10.1111/jse.12942

Cited by 3 publications

(1 citation statement)

References 45 publications

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“…Among which, 20 specimens had the trunk appendages preserved, and 13 had eyes preserved. These materials were collected from the middle member of the Shuijingtuo formation (Cambrian Series 2, Stage 3) at the Jinyangkou (prefix JY) section, Changyang County, Hubei Province, South China (Fu et al, 2019;Ma et al, 2021;Li et al, 2022). These soft-bodied fossils are preserved as dark organic carbon on fresh grey shale (Fu et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Ontogeny and brooding strategy of the early Cambrian arthropod Isoxys minor from the Qingjiang biota

Ma,

Pates,

et al. 2023

Front. Ecol. Evol.

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†Isoxys is a worldwide distributed bivalved arthropod known almost exclusively from Cambrian Burgess Shale-type Lagerstätten. Outline analyses using 34 specimens of the iconic large bivalved arthropod †Isoxys minor from the Cambrian Stage 3 (~518 Ma) Qingjiang biota and the Cambrian Stage 4 Guanshan biota, interpret that they are the same species and there is a very slight difference in the shape of the outlines of the carapaces between the two biotas. This suggests that environment might be driving intraspecific variation. Quantitative analysis of shape changes during growth using 51 specimens of †I. minor from the Qingjiang biota, reveals that its valves gradually elongate and the ratio of cardinal spines and spherical eyes relative to the valve length significantly decreases during postembryonic development. †I. minor has proportionally large cardinal spines and eyes in the earliest stages, and this allometric growth is beneficial for self-protection and foraging, which may have improved the survival rate of individuals with these characters. In addition, two of the specimens document the evidence of brood care in †I. minor, and the egg cluster occupies almost the entire dorsal region under the carapace. Compared to other early Paleozoic egg-carrying arthropods, †I. minor broods have the highest number (~300 per clutch) of small (Ø, ~0.5 mm) eggs. Since the ovigerous individuals are almost half the size of the adults, †I. minor may have possessed reproductive ability during the early life stage. The results indicate that spines played an antipredatory role for †I. minor, and that it followed an r-strategy of reproducing with many individuals at an early stage. †I. minor also represents the earliest diverging arthropod from which brood care has been documented.

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Section: Methodsmentioning

confidence: 99%

Ontogeny and brooding strategy of the early Cambrian arthropod Isoxys minor from the Qingjiang biota

Ma,

Pates,

et al. 2023

Front. Ecol. Evol.

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Exceptionally preserved radiodont arthropods from the lower Cambrian (Stage 3) Qingjiang Lagerstätte of Hubei, South China and the biogeographic and diversification patterns of radiodonts

Wu,

Pates,

Zhang

et al. 2024

Papers in Palaeontology

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The Cambrian (Series 2, Stage 3) Qingjiang Lagerstätte of South China is one of the most diverse Burgess Shale‐type deposits around the world, yielding abundant non‐biomineralized fossils. Radiodonta, a taxonomically and ecologically diverse stem‐euarthropod group, has been generally thought to represent the largest consumers in early Palaeozoic marine ecosystems. Here we describe several new radiodont specimens from the Qingjiang Lagerstätte assigned to various groups, including Stanleycaris qingjiangensis sp. nov., a new type of hurdiid head carapace, one possible Hurdia carapace, and two partial appendages with uncertain affinities. These specimens not only extend the geographic and stratigraphic range of these taxa, they also illuminate the diversity of radiodonts (in particular hurdiids) in their early evolutionary history. Radiodont palaeobiogeographic patterns are visualized using network analysis. Laurentia and South China share many members at the genus level, Anomalocaris is the most cosmopolitan taxon, but most genera are endemic. Radiodonts show a high initial diversity that declines through the early Palaeozoic, enabling three diversification phases of radiodonts to be recognized: the thriving phase (Cambrian Series 2), declining phase (Cambrian Miaolingian) and terminal phase (Cambrian Furongian to Ordovician Floian).

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Thermal History of Cambrian Burgess Shale-Type Deposits: New Insights from the Early Cambrian Chengjiang and Qingjiang Fossils of South China

Qiao,

Cui,

Xing

et al. 2024

J. Earth Sci.

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A new red alga preserved with possible reproductive bodies from the 518‐million‐year‐old Qingjiang biota

Cited by 3 publications

References 45 publications

Ontogeny and brooding strategy of the early Cambrian arthropod Isoxys minor from the Qingjiang biota

Ontogeny and brooding strategy of the early Cambrian arthropod Isoxys minor from the Qingjiang biota

Exceptionally preserved radiodont arthropods from the lower Cambrian (Stage 3) Qingjiang Lagerstätte of Hubei, South China and the biogeographic and diversification patterns of radiodonts

Thermal History of Cambrian Burgess Shale-Type Deposits: New Insights from the Early Cambrian Chengjiang and Qingjiang Fossils of South China

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