A new euarthropod from the Cambrian Stage 4 Guanshan Biota of South China

Jiao, De guang; Du, Kun-sheng

doi:10.4202/app.00937.2021

Cited by 2 publications

(7 citation statements)

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“…H–I, Turcutheca lavrica Qian, 1978: H, ELI‐ZJQDH0410101; I, ELI‐ZJQDH0420241. J–K, Paragloborilus subglobosus He in Qian 1977: J, ELI‐ZJQ02606; K, ELI‐ZJQ0260P30051. L, N, Q–R, Cupitheca decollate Sun et al ., 2019: L, ELI‐ZJQDH0420251; N, ELI‐ZJQ0260P5009; Q–R, magnifications of N showing the fibrous composition of the wall.…”

Section: Resultsmentioning

confidence: 99%

“…L, N, Q–R, Cupitheca decollate Sun et al ., 2019: L, ELI‐ZJQDH0420251; N, ELI‐ZJQ0260P5009; Q–R, magnifications of N showing the fibrous composition of the wall. M, Cupitheca mira He in Qian, 1977; ELI‐ZJQDH041005. O–P, Cupitheca decollate ; ELI‐ZJQ0260P3002: P, magnified view of box outline in O.…”

Section: Resultsmentioning

confidence: 99%

“…Many hyoliths have been reported from Stage 2 of South China (the Wastonella crosbyi Zone), including Allatheca , Eonovitatus , Exilitheca , Loculitheca , Turcutheca ( Turcutheca lavrica Qian, 1978, fig. 3H), Cupitheca ( C. mira He in Qian 1977, fig. 4M; C. decollate Sun et al ., 2019, fig.…”

Section: Resultsmentioning

confidence: 99%

“…4M; C. decollate Sun et al ., 2019, fig. 4L, N), Paragloborilus ( P. subglobosus He in Qian 1977, fig. 4J, K), and Pseudovalitheca ( P. crassa Yu, 1974, fig.…”

Section: Resultsmentioning

confidence: 99%

“…2022), and some hyoliths such as Neogloborilus applanatus Qian & Zhang, 1983 (Fig. 5A–J) and Cupitheca mira He in Qian 1977 (Fig. 6A–G) have strong dorsally curved conchs rather than the typical straight conical conch.…”

Section: Resultsmentioning

confidence: 99%

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Morphological disparity and evolutionary patterns of Cambrian hyoliths

Liu,

Topper,

Strotz

et al. 2024

Papers in Palaeontology

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Hyolitha represent one of the major constituents of the Cambrian Evolutionary Fauna, first appearing in the Terreneuvian and rapidly diversifying soon after. Recent work has both enriched the hyolith fossil record and expanded our understanding of their biology, but studies documenting the evolutionary trajectory of Cambrian hyoliths remain scarce. Here we present the first study of changes in morphological disparity in Cambrian hyoliths over time with the aim of characterizing the evolutionary trajectory of hyoliths throughout their primary period of diversification. Our results show that hyoliths occupied distinct regions of morphospace at different times during the Cambrian, with an expansion in morphospace occupation associated with the increase in hyolith diversity in the early Cambrian. Both the Sinsk Event and multiple abiotic factors led to a decline in hyolith diversity in the Miaolingian, and morphological disparity also contracts in association with this reduction in diversity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…4M; C. decollate Sun et al ., 2019, fig. 4L, N), Paragloborilus ( P. subglobosus He in Qian 1977, fig. 4J, K), and Pseudovalitheca ( P. crassa Yu, 1974, fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Morphological disparity and evolutionary patterns of Cambrian hyoliths

Liu,

Topper,

Strotz

et al. 2024

Papers in Palaeontology

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Dynamic simulations of feeding and respiration of the early Cambrian periderm-bearing cnidarian polyps

Zhang¹,

Wang

Han³

et al. 2023

Preprint

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Although fossil evidence has been suggested the existence of the early muscular system in the ancient cnidarian jellyfish from the early Cambrian Kuanchuanpu biota (ca. 535 Ma), south China, the mechanism of feeding and respiration of the early jellyfish is conjecture. Recently, the polyp inside the periderm of olivooids was proven to be the calyx-like, most likely bearing short tentacles and bundles of coronal muscles at the edge of the calyx, thus presumably contributing to feeding and respiration. We simulate here the contraction and expansion of the microscopic periderm-bearing olivooid Quadrapyrgites via the dynamic, fluid–solid interactions (FSI) method to investigate their feeding and respiratory activities. The hydrostatic simulations show that the rate of water inhalation by the polyp subumbrella is positively correlated with the rate of contraction and expansion of the coronal muscles, consisting with the previous feeding and respiration hypothesis. The dynamic simulations also show that the frequent inhalation/exhalation of water through the periderm polyp expansion/contraction conducted by the muscular system of Quadrapyrgites, most likely represents the ancestral feeding and respiration patterns of Cambrian sedentary medusozoans that predated the rhythmic jet-propelled swimming of the modern jellyfish. It will be a remarkable step to apply the dynamic fluid simulation to other early Cambrian cnidarians and metazoans to enlighten their behaviours during the Cambrian explosion.

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A new euarthropod from the Cambrian Stage 4 Guanshan Biota of South China

Cited by 2 publications

References 0 publications

Morphological disparity and evolutionary patterns of Cambrian hyoliths

Morphological disparity and evolutionary patterns of Cambrian hyoliths

Dynamic simulations of feeding and respiration of the early Cambrian periderm-bearing cnidarian polyps

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