Petrocardium

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Petrocardium
Temporal range:
Ma
↓
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Monocots
Order:
Alismatales
Family:
Araceae
Subfamily:
incertae sedis
Genus:
Petrocardium

Herrera et al. 2008
Type species
P. wayuuorum
Species
  • P. cerrejonense
  • P. wayuuorum

Petrocardium is an

Ma), Cerrejón Formation deposits in Colombia.[1][2]

History and classification

The genus is known only from the two

Smithsonian Museum of Natural History and led by Fabiany Herrera from the Smithsonian Tropical Research Institute. Herrera and associates published their 2008 type description in the American Journal of Botany.[1]

The generic epithet Petrocardium is

Amerindian tribe which lives in the Rancheria Basin area of Colombia. The specific epithet "cerrejonense" is a derivation of Cerrejón and reflects the type locality, the Cerrejón Formation.[1]

Description

Although several

Neotropical rainforest basin.[1]

Petrocardium wayuuorum

The single known specimen of P. wayuuorum, ING-0902, was recovered from locality 0315, a 6 metres (20 ft) by 50 centimetres (20 in) lens of fine grained sandstone in the Cerrejón Formation.[1] The specimen is missing the basal portion of the leaf but shows a smooth margin in the preserved regions of the leaf blade and was either cordate or sagittate. The overall size of the leaf was 6.2 by 3.8 centimetres (2.4 by 1.5 in), and has a vein structure similar to that of Anthurium species that form secondary veins which group in single cluster of veins parallel to the outer margin of the leaf. This secondary vein structure is used to distinguish P. wayuuorum from P. cerrejonense.[1]

Petrocardium cerrejonense

As with P. wayuuorum, P. cerrejonense is known from only one partial leaf and specimen ING-0804, is also from locality 0315.[1] The specimen is incomplete with only portions of the tip and middle area of the leaf blade known. The overall size of the leaf was over 9.5 by 24.3 centimetres (3.7 by 9.6 in), with an acuminate tip and smooth margin. P. cerrejonense has a vein structure similar to that of Anthurium species which form secondary veins which group into two clusters of veins parallel to the outer margin of the leaf and the secondary vein structure is used to distinguish P. cerrejonense from P. wayuuorum.[1]

References

  1. ^
    PMID 21628164
    .
  2. ^ Cerrejón 0315 at Fossilworks.org
  3. ^ Liddell, H.G. & Scott, R. (1940). A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with the assistance of. Roderick McKenzie. Oxford: Clarendon Press.
  4. PMID 19833876
    .
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