Sapindopsis

Sapindopsis Temporal range: Early Cretaceous–Late Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N
Sapindopsis fossil, National Museum of Natural History
Scientific 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
See text

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. ^[2]

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 acuta(Heer) Budantsev, 1983 ^[3] - Albian–Coniacian; Atane Formation; Isunguak & Asuk, Greenland
• Sapindopsis angusta(Heer) Seward & Conway, 1935 ^[4] - Albian–Coniacian; Atane Formation; Isunguak & Asuk, Greenland
• Sapindopsis anhouryiDilcher & Basson 1990 ^[1] - Cenomanian; Sannine Formation; Namoura, Lebanon.
• Sapindopsis asiaticusGolovneva & Sun 2022 ^[5] - Late Albian - Early Turonian; Krivorechenskaya Formation; Russia.
• Sapindopsis brevifoliaFontaine, 1889 ^[6] - Barremian, Potomac Group, Virginia, USA
• Sapindopsis chinensisGolovneva & Sun 2022 ^[5] - Late Albian Dalazi Formation; China & Alchan Formation; Russia
• Sapindopsis magnifolia(Fontaine) Dilcher & Basson 1990 ^[1] (type) Barremian, Potomac Group, Virginia, USA
• Sapindopsis orientalisGolovneva & Sun 2022 ^[5] - Frentsevka Formation of Russia.
• Sapindopsis powelliana(Lesquereux) Wang & Dilcher 2018 ^[2] - Cenomanian; Dakota Formation; Kansas, USA.
  • Distefananthus hoisingtonensis (Huegele & Wang, 2022) may be the inflorescence of this species. ^[7]
• Sapindopsis retallackiiWang & Dilcher 2018 ^[2] - Cenomanian Dakota Formation; Kansas, USA
• Sapindopsis variabilis Fontaine 1889 - Barremian Patapsco Formation; 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. 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.
3. Budantsev, L. Y. (1983). History of the Arctic flora of the Early Cainozoic. Leningrad: Izdatel'stvo "Nauka", Leningradskoe otdelenie.
4. Seward, A.C.; Conway, V.M. (1935). "Additional Cretaceous plants from Western Greenland". Kongliga Svenska Vetenskaps Academiens Handlingar. 15 (3): 1–41.
5. 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.
6. Fontaine, W. (1889). The Potomac or younger Mesozoic flora (Report). Monographs. Vol. 15. United States Geological Survey. pp. 1–377. doi:10.3133/m15.
7. 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. Bibcode:2023RPaPa.30904815H. doi: 10.1016/j.revpalbo.2022.104815 . ISSN   0034-6667. S2CID   254090176.