<i>Cathaya</i>(Pinaceae) pollen from Mio-Pliocene sediments in the Himi area, central Japan

Saito, Takehisa; Wang, Weimin; Nakagawa, Tomio

doi:10.1080/00173130052504324

Cited by 15 publications

(5 citation statements)

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“…This is typical of pinoid pollen, whereas in Abies , the sacci are borne nearly lateral to the corpus (Bagnell, 1975). The juncture formed between the corpus and sacci of the P. burtonii pollen forms an obtuse angle, which is characteristic of both Picea and Cathaya (Kapp and King, 2000; Liu and Basinger, 2000; Saito et al, 2000), whereas in Pinus , the angle is acute (Kapp, 1969; Kapp and King, 2000). Finally, the pollen exhibits sculptured cappula ridges that largely occlude the germinal furrow on the ventral, or distal, surface of the grain; occlusion of the germinal furrow is diagnostic for Picea (Bagnell, 1975).…”

Section: Discussionmentioning

confidence: 99%

A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

Klymiuk

Stockey

2012

American J of Botany

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Section: Discussionmentioning

confidence: 99%

A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

Klymiuk

Stockey

2012

American J of Botany

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“…While some of these grains may have been aberrant and/or shrunken forms of the genus Pinus, they were somewhat degraded specimens, as seen in Plate II (33-36) and Plate V (15 and 16). Some could represent Cathaya (see Saito et al, 2000), a member of the Pinaceae, whose pollen resembles that of Pinus but is slightly smaller (Ying et al, 1993;T. Saito, 2013, personal commun.).…”

Section: Comparison Of the Four Oligocene Florasmentioning

confidence: 99%

Pollen evidence of floristic turnover forced by cool aridity during the Oligocene in Colorado

Leopold

Zaborac-Reed

2019

Geosphere

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New pollen data from four Oligocene floras in volcanic landscapes of Colo rado record important climatic shifts that reshaped the local flora and promoted the development of subarid vegetation types. We combined new pollen data with previous megafossil evidence to assess vegetation changes during the Eocene-Oligocene Transition (EOT). Pollen data are the basis for updating the list of flora identified at Creede. Local extinctions in response to lower sum mer rainfall abruptly removed many of the exotic woody taxa of eastern North American and Asian affinity. This loss was followed by the appearance of xeric shrubland taxa of the Ponderosa pinefir woodland and sagebrush flora that characterize the Colorado area today. Telltale genera appear and suggest an understory of shrubs such as Artemisia, Elaeagnus, Ribes, Ephedra, Jamesia, and Shepherdia. Poaceae are also present. Significantly, herbaceous taxa of the Asteraceae, Rosaceae, Cucurbitaceae, Euphorbiaceae, and Caryophyllaceae make their first appearances in the fossil record of Colorado here. The new Oligocene pollen data record a significant drop in summer rainfall and a climatic cooling at 33.8 Ma of several degrees that relates to the Oi1 glaciation in Antarctica. The particular taxa that continued after the EOT were a basis for estimating changes in soil moisture during this time. The condi tions in Colorado are reminiscent of Wolfe's "terminal Eocene event." This re markable shift precipitated the development of a local pollen and megafossil flora more "modern" in aspect (e.g., a larger proportion of extant local genera are present). The impressive floristic turnover was probably a response to the increasingly continental climate that embraced the area during the Oligocene.

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“…D). Climatic warming has been suggested during the early Pliocene based on the abundance of Cathaya pollen grains in northeast Honshu (Takeuti, ; Liu & Basinger, ) and northern central Honshu (Saito et al, ). The genus is currently a constituent of warm‐temperate forest vegetation in Southeast China (Farjon, ) and is considered as a sensitive tool for inferring climate conditions (Saito et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…Climatic warming has been suggested during the early Pliocene based on the abundance of Cathaya pollen grains in northeast Honshu (Takeuti, ; Liu & Basinger, ) and northern central Honshu (Saito et al, ). The genus is currently a constituent of warm‐temperate forest vegetation in Southeast China (Farjon, ) and is considered as a sensitive tool for inferring climate conditions (Saito et al, ). A continuous reduction of “Tertiary relicts” has been recognized at this stage (Saito, ); some of them tend to disappear earlier in the north and later in the south during the Pliocene–Pleistocene across the Japanese Islands (Momohara, ).…”

Section: Resultsmentioning

confidence: 99%

“…Prior to the boundary between Messinian–Zanclean, the climate became warmer again, followed by a cooling trend toward the late Pliocene. The Mio–Pliocene occurrence of Cathaya in Central Japan with an abundance in the early Pliocene probably reflected the early Pliocene warm climate (Saito et al, ). This is also supported by palynological studies in Hokkaido (Igarashi, ).…”

Section: Discussionmentioning

confidence: 99%

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Oligocene–Neogene fossil history of Asian endemic conifer genera in Japan and Korea

Yabe¹,

Jeong²,

Kim

et al. 2018

J of Sytematics Evolution

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Temporal and spatial changes of ten conifer genera that are endemic to East Asia were analyzed based on fossil data from humid temperate forests in the Japanese Islands and Korean Peninsula to elucidate the phytogeographic history, and to understand differences between those genera eliminated from the Japanese Islands and those that remained extant. All these genera, except for Thujopsis, have existed in the area since the Paleogene and remained in the Japanese islands after initial separation from the continent at the early–middle Miocene. Fossil representatives of locally extinct six genera have tendencies to adapt to wider ranges of climatic conditions than their modern relatives. Metasequoia, Glyptostrobus, and Taiwania began to change their distributions since the late Miocene possibly through habitat partitioning. Keteleeria, Pseudolarix, and Cunninghamia appeared to have expanded their habitat toward warmer conditions during the mid‐Miocene Climatic Optimum and then became restricted to warmer forest vegetation by the end of Pliocene. Overall changes in their distribution can be explained by climatic effects. On the contrary, three genera endemic to Japan (Sciadopitys, Cryptomeria, and Thujopsis) followed clearly different trends from the others. Cryptomeria and Thujopsis were especially adapted to cooler‐temperate climate and they retained their habitat areas in the northern part of Japan. During the late Miocene–Pliocene, the islands connected with the Eurasian continent again, which probably acted as a corridor for warm‐adapted genera to disperse southwest. Current data suggest that ecological requirements of each genus might be essential to determine whether they could survive on the Japanese Islands.

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Cathaya(Pinaceae) pollen from Mio-Pliocene sediments in the Himi area, central Japan

Cited by 15 publications

References 1 publication

A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

A Lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

Pollen evidence of floristic turnover forced by cool aridity during the Oligocene in Colorado

Oligocene–Neogene fossil history of Asian endemic conifer genera in Japan and Korea

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