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Azolla colhuehuapensis

Polypodiopsida - Salviniales - Salviniaceae

Taxonomy
Azolla colhuehuapensis was named by Vallati et al. (2017). Its type specimen is UNPSJB-MFP 4, a megaspore (Megaspore), and it is a 3D fossil preserving soft parts. Its type locality is Cerro de los Fragmentos (CF1), which is in a Maastrichtian channel lag sandstone/lime mudstone in the Lago Colhué Huapi Formation of Argentina.

Synonymy list
YearName and author
2017Azolla colhuehuapensis Vallati et al. p. 48 figs. 3-4
2020Azolla colhuehuapensis Vallati et al. p. 6

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RankNameAuthor
kingdomPlantae
phylumPteridophyta
classPolypodiopsida
subclassPolypodiidae()
RankNameAuthor
orderSalvinialesLink 1833
familySalviniaceaeLestiboudois
genusAzollaLamarck 1783
speciescolhuehuapensis

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.

†Azolla colhuehuapensis Vallati et al. 2017
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Diagnosis
ReferenceDiagnosis
P. Vallati et al. 2017Megaspore apparatus pear-shaped, broader distally and covered by a mat of intertwined hairs or filosum. Megaspore spherical when uncompressed, with a smooth or faintly foveolate exine. Trilete mark with the laesurae extending about half of the radius of the spore. The proximal two-fifths of the megaspore apparatus occupied by the float system. Nine easily detachable floats arranged in two tiers, with three larger floats in the upper tier and six smaller floats in the lower tier. Floats loosely enmeshed by hairs of the filosum in compartments of prismatic geometry separated by a dense hairy wall. Floats with spongy vacuolated appearance under LM.
Measurements
No measurements are available
No ecological data are available

Age range: Maastrichtian or 72.10000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Maastrichtian72.1 - 66.0Argentina (Chubut) Azolla colhuehuapensis (type locality: 233994)