Jenkinsella E. REID et M. CHANDLER

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 : 53

Genus Jenkinsella E. REID et M. CHANDLER cf. Jenkinsella knowltonii GOLOVN. et P.I. ALEXEEV

Text-fig. 6q

M a t e r i a l. USNM PAL 620034.

L o c a l i t y. Park.

D e s c r i p t i o n. Raceme 23.4 mm long with three widely spaced follicles; peduncle 0.8 mm wide; follicles elliptical with truncated base and acute apex, 10.2–11.0 mm long, 3.2–4.0 mm wide.

R e m a r k s. Infructescences of Jenkinsella knowltonii are generally 35–50 mm long,have 5–7widely spaced follicles that are 10–16 mm long and 4–7 mm wide (Golovneva and Alekseev 2017). The Kishenehn specimen is slightly shorter, is lacking the preservation of reproductive shoots and has fewer follicles though this could be a preservational issue. J. knowltonii is known from the Paleocene Denver Formation of Colorado (Golovneva and Alexeev 2017).

Figures

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.