Ranunculaceae JUSS.

Smith, MacKenzie A., Greenwalt, Dale E. & Manchester, Steven R., 2023, Diverse Fruits And Seeds Of The Mid-Eocene Kishenehn Formation, Northwestern Montana, Usa, And Their Implications For Biogeography, Fossil Imprint 79 (1), pp. 37-88 : 51

publication ID

https://doi.org/ 10.37520/fi.2023.004

persistent identifier

https://treatment.plazi.org/id/4D2487A3-EF51-826D-FC66-FEEB6AFAFC5E

treatment provided by

Felipe (2024-01-10 22:00:26, last updated 2024-01-10 22:17:14)

scientific name

Ranunculaceae JUSS.
status

 

Family Ranunculaceae JUSS. View in CoL

Genus cf. Thalictrum L.

Text-fig. 6b View Text-fig

M a t e r i a l. USNM PAL 722388.

L o c a l i t y. Dakin.

D e s c r i p t i o n. Follicle 2.6 mm long, 1.4 mm wide at the widest; bulbous with one end tapering to a point and the antipodal side ending with a small cylinder measuring 0.4 mm tall and 0.5 mm wide; seven parallel striations 0.1 mm wide extend longitudinally.

R e m a r k s. Longitudinal ribbing along a chimney lamp-shaped follicle is characteristic of Thalictrum . Fossil Thalictrum fruits are known from the Oligocene and Miocene of Europe ( Szafer 1961, Dorofeev 1963, Mai 1995) and the Pleistocene of Nepal ( Bhandari et al. 2009, 2010, 2011). If confirmed, this would be the oldest Thalictrium ca. 20 Ma older than estimates for crown of that genus ( Soza et al. 2013).

Bhandari, S., Momohara, A., Paudayal, K. N. (2009): Late Pleistocene plant macro-fossils from the Gokarna formation of the Kathmandu Valley, Central Nepal. - Bulletin of the Department of Geology, 12: 75 - 88. https: // doi. org / 10.3126 / bdg. v 12 i 0.2252

Bhandari, S., Paudayal, K. N., Momohara, A. (2010): Late Pleistocene plant macrofossils from the Thimi Formation (Madhyapur Thimi section) of the Kathmandu Valley, central Nepal. - Journal of Nepal Geological Society, 40: 31 - 48. https: // doi. org / 10.3126 / jngs. v 40 i 0.23594

Bhandari, S., Paudayal, K. N., Momohara, A. (2011): Climate change on the basis of plant macrofossil assemblages from the Late Quaternary sediments from the Mulpani section of the Gokarna Formation, Kathmandu Valley, Nepal. - Journal of Stratigraphic Association of Nepal, 7: 47 - 58. https: // doi. org / 10.3126 / jngs. v 42 i 0.31440

Dorofeev, P. I. (1963): Tretichnye flory Zapadnoi Sibiri [The Tertiary floras of western Siberia]. - Izdatelstvo Akademii nauk SSSR, Moscow, 344 pp. (in Russian)

Mai, D. (1995): Tertiare vegetationsgeschichte Europas: methoden und ergebnisse. - Gustav Fischer Verlag, Jena, Stuttgart, New York, 691 pp. https: // doi. org / 10.1002 / fedr. 4921060333

Soza, V. L., Haworth, K. L., Di Stilio, V. S. (2013): Timing and consequences of recurrent polyploidy in meadowrues (Thalictrum, Ranunculaceae). - Molecular Biology and Evolution, 30 (8): 1940 - 1954. https: // doi. org / 10.1093 / molbev / mst 101

Szafer, W. (1961): Miocenska flora ze Starych Gliwic na Slasku [Miocene flora from Old Gliwice in Silesia]. - Wydawnictwa Geologiczne, Warszawa, 251 pp. (in Polish) https: // doi. org / 10.5586 / mb. 1958.006

Gallery Image

Text-fig. 6. a: USNM PAL 625188 cf. Ceratophyllum fruit. Scale bar 1mm. b: USNM PAL 722388 cf. Thalictrum sp. Scale bar 2mm. c: USNM PAL 622299 Platanus sp. achene with prominent seed body. Scale bar 2mm. d: USNM PAL 768140 Platanus sp. achene with dispersal hairs. Scale bar 2mm. e: Close-up of USNM PAL 768140 Platanus sp. achene with red arrows pointing to dispersal hairs. Scale bar 2mm. f: USNM PAL 622299 Platanus sp. achene with red arrows pointing to hairs. Scale bar 2mm. g: USNM PAL 623312 winged seed of Carpolithes lunatus. Scale bar 1mm. h: USNM PAL 625269 winged seed of Carpolithes lunatus. Scale bar 1mm. i: USNM PAL 625257 winged seed of Carpolithes lunatus with highly curved wing. Scale bar 1mm. j: USNM PAL 624499 winged seed of Carpolithes lunatus. Scale bar 1mm. k: USNM PAL 622294 winged seed of Carpolithes lunatus with raphe wrapping along wing towards the chalazal end of the seed body. Scale bar 1mm. l: USNM PAL 717434 winged seed of Carpolithes lunatus with raphe wrapping along wing towards the chalazal end of the seed body. Scale bar 1mm. m: USNM PAL 625251 winged seed of Carpolithes lunatus with raphe wrapping along wing towards the chalazal end of the seed body. Scale bar 1mm. n: USNM PAL 625541 elongated winged seed of Carpolithes lunatus with raphe wrapping along wing towards the chalazal end of the seed body. Scale bar 1mm. o: USNM PAL 625286 elongated winged seed of Carpolithes lunatus. Scale bar 1mm. p: USNM PAL 624179 winged seed of Carpolithes lunatus with raphe wrapping along wing towards the chalazal end of the seed body. Scale bar 1mm. q: USNM PAL 620034 cf. Jenkinsella knowltonii. Scale bar 2mm.