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Macginitiea angustiloba
Taxonomy
Aralia angustiloba was named by Lesquereux (1878).
It was recombined as Platanophyllum angustiloba by MacGinitie (1941); it was recombined as Macginitiea angustiloba by Manchester (1986).
It was recombined as Platanophyllum angustiloba by MacGinitie (1941); it was recombined as Macginitiea angustiloba by Manchester (1986).
Synonymy list
| Year | Name and author |
|---|---|
| 1878 | Aralia angustiloba Lesquereux p. 22 figs. plate 5, figs. 4, 5 |
| 1919 | Aralia angustiloba Knowlton |
| 1941 | Platanophyllum angustiloba MacGinitie |
| 1986 | Macginitiea angustiloba Manchester |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Macginitiea angustiloba Lesquereux 1878
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. R. Manchester 1986 | Leaves palmately lobed and generally symmetrical with five to nine, usually five or seven, lobes. Petiole 3.6-cm long, swollen and hollow at the base, vascularized by numerous collateral vascular bundles. Lamina 15-35 cm long (base to tip of medial lobe), 12-34 cm wide; base decurrent to straight sided, 75°-140° (-180°), sometimes with a pair of basal auriculae. Lobes relatively narrow, 2.5-6.5 cm wide, with acute apices, entire margined (or rarely with tiny teeth). Margin thickened. Sinuses between the lobes deep, extending 40%-60% from the distance of the apex to the base of the lamina. Venation basally (rarely suprabasally) palinactinodromus; the petiole trifurcates at the base of the lamina with a central primary continuing to the apex of the median lobe; each lateral primary then dichotomizes once, twice, or three times to vacularize the leaves with five, seven, or nine lobes, respectively. Angels between adjacent primary veins of a leaf, 15°-30°. Primaries of medium thickness. Secondaries pinnate, subopposite, camptodromous, 15-35, usually ca. 30, pairs per midvein, spaced approximately the same distance apart in all lobes of the leaf, arising from the primary at angles of 40°-60°. Within the lobes, each secondary curves marginally to join the superadjacent secondary. Below the sinuses, secondaries arise at the same angle as those above but frequently join oppositely with the secondaries of adjacent primaries to form a series of inverted V's. Intersecondary veins common. Loops of secondaries enclosed by one series of marginal loops of tertiary order. Tertiary veins originating at right angles, thin and percurrent. Quarternary veins orthogonal. Fifth-order veins forming 4-6 sided areoles intruded by once-branched, straight, or curved freely ending veinlets. |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: Middle Eocene or 48.07000 to 37.71000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene | USA (California) | Platanophyllum angustiloba (23995 23999 24002) | |
| Middle Eocene | USA (Oregon) | Macginitiea angustiloba (21220) |