Araucaria huncoensis

Name

Araucaria huncoensis

Rank

Species

Generic Name

[Genus] Araucaria

Authors (Name)

Rossetto-Harris G.  

Authors (Pub.)

Rossetto-Harris G. Wilf P. Escapa I. H. Andruchow-Colombo A.  

Publication

Eocene Araucaria Sect. Eutacta from Patagonia and floristic turnover during the initial isolation of South America [2020/5]

Journal

American Journal of Botany

Volume

107

Issue

5

Page number

11 [816]

Year

2020

Fossil Status

strobili (ovuliferous)

Stratigraphy

Ypresian

Strat. comment

La Huitrera Formation

Location

quarry LH27, Laguna del Hunco, Tufolitas Laguna del Hunco, northwest Chubut Province, Argentina

Paleoregion

America (South)

Data for Holotypus

Repository

Museo Paleontologico Egidio Feruglio, Trelew, Argentina

Repository Number

MPEF-Pb 10556

Num

8 B

Pub.

Eocene Araucaria Sect. Eutacta from Patagonia and floristic turnover during the initial isolation of South America [2020/5]

Data for Paratypus

Repository

Museo Paleontologico Egidio Feruglio, Trelew, Argentina

Repository Number

Leafy branch segments with acicular falcate foliage: MPEF-Pb 10587–10590, 10592–10594, 10596–10599 (quarry LH13); 10600, 10604 (LH15); 10607, 10608 (LH27); 10609 (LH25); 10630 (LH13); 10633 (LH27); 10640 (LH13). Leafy branch segments with ovate imbricate foliage: MPEF-Pb 10580 (LH6); 10581 (LH13); 10582 (LH25); 10583–10586 (LH27); 10591 (LH6); 10595 (LH13); 10601 (float specimen); 10602 (LH6); 10603 (LH22); 10605 (LH13); 10606 (LH25), 10610–10613 (LH27); 10626 (LH31), 10629 (LH29). Ovuliferous complexes: MPEF-Pb 10510 (LH6); 10511, 10512 (LH2); 10513, 10514 (LH13); 10515 (LH6); 10516 (LH2); 10517–10520 (LH13); 10521 (LH22); 10522 (LH13); 10523 (LH6); 10524–10529 (LH13); 10530 (LH20); 10531 (float specimen); 10532–10534 (LH13); 10535 (LH25); 10536, 10537 (LH27); 10538– 10540 (LH13); 10541 (LH6); 10542 (LH27); 10543, 10544 (LH13); 10545 (LH27); 10546 (LH20); 10547 (LH13); 10548 (LH15); 10549 (LH13); 10550 (LH15); 10551 (LH27); 10552 (LH25); 10553 (LH27); 10554 (LH13); 10555 (LH6); 10556, 10557 (LH27); 10558 (LH6); 10559 (LH2); 10560 (LH13); 10561 (LH22); 10562 (LH2); 10563 (LH27); 10564 (LH2); 10565, 10566 (LH13); 10567–10574 (LH27); 10575–10579, 10621–10623 (AL1); 10624 (LH31); 10625 (LH29); 10627, 10628 (LH29); 10631 (LH13); 10632, 10634 (LH27); 10635, 10636 (LH13); 10637 (LH29); 10638 (LH27); 10639 (LH29); 10640 (LH13); 10641 (LH27); 10642 (LH29); 10643 (LH13); 10644 (LH29); 10645 (LH13); 10646, 10647 (LH13); 10648, 10649 (LH28); 10650 (LH13); 10651 (LH29); 10652, 10653 (LH13). Pollen cones: MPEF-Pb 10614 (LH27); 10615 (LH6); 10616 (LH27); 10617 (LH13); 10618, 10619 (LH27).

Diagnosis

Ovuliferous complexes are narrowly flabellate-cuneate, with narrow, angular lateral extensions and ratios of maximum length to width close to one. Ovuliferous complex apophysis rounded, ligule short, broad triangle. Leafy branches dimorphic with acicular falcate and ovate imbricate foliage types, stomata perpendicularly oriented to the long axis of the leaf.