Sapindopsis

Sapindopsis ("Sapindus-like") is an extinct form genus for leaves of the Cretaceous Period, originally considered similar to soapberry. Associated reproductive structures now suggest it was more closely related to planes and sycamores of the family Platanaceae.[3]

Sapindopsis
Temporal range:
Sapindopsis magnifolia from the Potomac Group near Brooke, Virginia, U.S.A.
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Platanaceae
Genus: †Sapindopsis
(Fontaine) Dilcher and Basson 1990[1]
Type species
†Sapindopsis magnifolia
Fontaine, 1889
Species
  • †Sapindopsis magnifolia (Fontaine) Dilcher and Basson 1990[1](type)
  • †Sapindopsis anhouryi Dilcher and Basson 1990[1]
  • †Sapindopsis asiatica Golovneva and Sun 2022[2]
  • †Sapindopsis chinensis Golovneva and Sun 2022[2]
  • †Sapindopsis orientalis Golovneva and Sun 2022[2]
  • †Sapindopsis powelliana (Lesquereux) Wang and Dilcher 2018[3]
  • †Sapindopsis retallackii Wang and Dilcher 2018[1]
  • †Sapindopsis variabilis Fontaine 1889

Description

In the form generic system of paleobotany Sapindopsis is used only for leaves, which are compound with three to six leaflets. Leaflets vary in distinctness or confluence with the midrib. The venation is pinnate, eucamptodromous to brochidodromus, with percurrent tertiary veins.

Distribution and species

Sapindopsis was geographically widespread from Asia to North America. Species include:

  • †Sapindopsis magnifolia (Fontaine) Dilcher and Basson 1990[1] (type), from the Potomac Group, Early Cretaceous (Barremian) of Virginia, USA
  • †Sapindopsis anhouryi Dilcher and Basson 1990,[1] from the Sannine Formation, mid-Cretaceous (Cenomanian) of Namoura, Lebanon.
  • †Sapindopsis asiaticus Golovneva and Sun 2022,[2] from the Krivorechenskaya Formation (upper Albian-lower Turonian) of Russia.
  • †Sapindopsis chinensis Golovneva and Sun 2022,[2] from the Dalazi Formation of China and Alchan Formation of Russia (upper Albian)
  • †Sapindopsis orientalis Golovneva and Sun 2022,[2] from the Frentsevka Formation of Russia.
  • †Sapindopsis powelliana (Lesquereux) Wang and Dilcher 2018,[3] from the Dakota Formation, mid-Cretaceous (Cenomanian) of Kansas, USA. Distefananthus hoisingtonensis (Huegele and Wang 2022) may represent the inflorescence of the same species.[4]
  • †Sapindopsis retallackii Wang and Dilcher 2018,[3] from the Dakota Formation, mid-Cretaceous (Cenomanian) of Kansas, USA
  • †Sapindopsis variabilis Fontaine 1889, from the Patapsco Formation, Early Cretaceous (Barremian) of Virginia, USA

References
  1. Dilcher, D.L.; Basson, P.W. (1990). "mid Cretaceous angiosperm leaves from a new locality in Lebanon". Botanical Gazette. 151: 538–547. doi:10.1086/337855. S2CID 84242346.
  2. Golovneva, Lina B.; Volynets, Elena B.; Zolina, Anastasia A.; Sun, Yuewu (2022-10-11). "New species of Sapindopsis Fontaine (Platanaceae) from the mid-Cretaceous of northeastern Asia and their paleogeographical and evolutionary implications". Cretaceous Research. 142: 105391. doi:10.1016/j.cretres.2022.105391. ISSN 0195-6671. S2CID 252861479.
  3. Wang, H.-S.; Dilcher, D.L. (2018). "Early Cretaceous angiosperm leaves from the Dakota Formation, Hoisington III locality, Kansas, USA" (PDF). Palaeontologia Electronica. 31.3.34A: 1–49. doi:10.26879/841. Retrieved 2018-11-25.
  4. Huegele, Indah B.; Wang, Hongshan (2023-02-01). "An unusual plane tree from the Early Cretaceous of Kansas, USA". Review of Palaeobotany and Palynology. 309: 104815. doi:10.1016/j.revpalbo.2022.104815. ISSN 0034-6667. S2CID 254090176.
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