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Paleoazolla patagonica
Taxonomy
Paleoazolla patagonica was named by Archangelsky et al. (1999). Its type specimen is MPEF PALIN 1, a megaspore, and it is a compression preserving soft parts. Its type locality is Paleoazolla type locality, Cerro Buitre, which is in a Maastrichtian terrestrial horizon in the La Colonia Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 1999 | Paleoazolla patagonica Archangelsky et al. p. 1201 |
| 2014 | Paleoazolla patagonica Cúneo et al. |
| 2020 | Paleoazolla patagonica De Benedetti et al. p. 1059 fig. 3 |
| 2021 | Paleoazolla patagonica De Benedetti et al. |
| 2023 | Paleoazolla patagonica De Benedetti et al. p. 7 |
| 2024 | Paleoazolla patagonica De Benedetti et al. p. 5 |
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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.
†Paleoazolla patagonica Archangelsky et al. 1999
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Archangelsky et al. 1999 | Megaspore apparatus up to 950 mm long, 700 mm wide, composed of an ellipsoidal, commonly flattened megaspore and a complex of three or four floats; megaspore up to 650 mm long, 350 mm wide, and 115 mm thick; floats nearly spherical, 200–350 mm in diameter and attached directly to one end of the megaspore; float divided into a smooth inner zone up to 6 mm thick and an irregularly alveolate outer zone up to 25 mm thick covered by multibarbed hairs (glochidia); megaspore wall up to 52 mm thick, divided into a 7–10 mm thick exine
and a 28–42 mm thick perine; perine organized into a dense spongy endoperine 4–10 mm thick and a loosely organized, irregularly packed 18–20 mm thick exoperine covered by a 6–12 mm thick infrafilosum. Massulae irregular, 350–490 mm diameter, with a pseudocellular alveolar structure from which the glochidia arise as external projections; glochidia multibarbed, up to 60 mm long, and 5 mm wide, nonseptate, commonly with irregularly distributed anchor-shaped tips adpressed to the massula surface; numerous rounded, inaperturate microspores per massula, microspores 42–63 mm in diameter. | |
| F. De Benedetti et al. 2020 | Megaspore massula up to 890 μm long and 480 μm wide, elliptic to ovate, containing two spherical trilete megaspores, rarely one or three; each megaspore surrounded by a dense inner perine, and all spores surrounded by a spongy outer perine; surface completely covered by a thick filosum. Microspore massula up to 140 μm diameter, rounded to triangular, containing one spherical trilete microspore; surface covered by irregularly distributed multibarbed aseptate glochidia. Vegetative parts unknown. |
Measurements
No measurements are available
No ecological data are available
Age range: Maastrichtian or 72.20000 to 66.00000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Cretaceous - Early/Lower Paleocene | Argentina (Chubut) | Paleoazolla patagonica (195707) | |
| Maastrichtian | Argentina (Chubut) | Paleoazolla patagonica (type locality: 31653 199410 239890 239891) |