The tertiary occurrence and distribtion of Podocarpus (section Dacrycarpus) in Australia and Tasmania

Cookson, IC; Pike, KM

doi:10.1071/bt9530071

Cited by 50 publications

(19 citation statements)

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“…Architectural features: vegetative shoots bearing small, simple, scale-like, spirally inserted leaves, defoliation units unbranched axes. Leaves decurrent and appressed, but on some axes regularly spaced, slightly spreading (similar to those illustrated by Cookson and Pike, 1953. fig.…”

Section: (C) (D) (T) (G) 5)supporting

confidence: 61%

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Early Miocene flora of the Manuherikia Group, New Zealand. 2. Conifers

Pole

1992

Journal of the Royal Society of New Zealand

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Remains of six conifer taxa are described from early Miocene sediments of the Manuherikia Group, New Zealand. Two of these are new, Retrophyllum vulcanense sp. nov. and Podocarpus alwyniae sp. nov.. The others are Araucaria sp. sect. Eutacta, present as impressions of vegetative shoots and isolated ovuliferous cone scales, shoots of Dacrycarpus dacrydioides (A. Rich.) de Laubenf.; a single impression of a Phyllocladus sp. phylloclade; and an impression of an unidentified shoot. This is the first record of the genus Retrophyllum from New Zealand.

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Section: (C) (D) (T) (G) 5)supporting

confidence: 61%

“…Rich) de Laubenf. (Cookson and Pike, 1953;Wells and Hill, 1989a, b), and I propose that they are conspecific. The cutin envelope seen over the guard cells of extant D.…”

Section: Dacrycarpusmentioning

confidence: 93%

Early Miocene flora of the Manuherikia Group, New Zealand. 2. Conifers

Pole

1992

Journal of the Royal Society of New Zealand

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“…Cookson and Pike (1953~) regarded the coal containing Dacrycarpus praecupressinus to be widespread in the Yallourn coal seam, and Blackburn (unpublished data, 1985) reported that the species was widespread in both the Yallourn and Morwell coal seams. This coal ranges in age from Late Oligocene to Miocene and possibly into the Pliocene (Stover and Partridge 1973).…”

Section: Methodsmentioning

confidence: 96%

“…Cookson and Pike (1953~) reported D. praecupressinus in a sandy layer on top of the coal at the Lucifer Mine, Bacchus Marsh, to which they assigned a probable Oligocene age (Cookson and Pike 1954).…”

Section: Methodsmentioning

confidence: 97%

“…Pole (personal communication) has noted a weak apical frill on D. dacrydioides. None of the fossil Dacrycarpus species observed has a marginal frill except D. praecupressinus from Yallourn, which has a weakly developed apical frill (Cookson and Pike, 1953~). A marginal frill is common in some other podocarpaceous genera, but D. eocenica is distinct from all of them on the basis of other cuticular characters.…”

Section: Dacrycarpus Macrofossilsmentioning

confidence: 96%

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Evolution of Acmopyle and Dacrycarpus (Podocarpaceae) foliage as inferred from macrofossils in south-eastern Australia

Hill¹,

Carpenter²

1991

Aust. Systematic Bot.

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Macrofossil specimens of Dacrycarpus and Acmopyle from south-eastern Australia are investigated. The specimens previously assigned to D. praecupressinus are revised, with one placed in a different genus and new species, Podocarpus witherdenensis, and some placed in a new species, D. latrobensis. One specimen is retained as the lectotype of D. praecupressinus. Dacrycarpus eocenica is re-examined and it is concluded that this species is not Dacrycarpus, but probably belongs to an extinct podocarpaceous genus. Dacrycarpus setiger is transferred to Acmopyle, and three new Acmopyle species, A. florinii, A. glabra and A. tasmanica, are described. It is hypothesised that during the Tertiary in south-eastern Australia stomatal distribution was reduced on Dacrycarpus and Acmopyle foliage. In Dacrycarpus the bilaterally flattened foliage type (which has a greater photosynthetic area than the bifacially flattened foliage) became rare or extinct after the Early Oligocene, prior to the extinction of the genus in the region. Acmopyle has not been recorded in the region after the Early Oligocene. A trend towards reduction in leaf size at high latitudes has previously been demonstrated in angiosperms but not gymnosperms and, along with the reduction of stomatal distribution, probably represents convergent evolution in response to climatic change.

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