Back
Oclloa
Genus Oclloa D.M. Erwin, Pfefferk., Alleman Rev. Palaeobot. Palynol., 80(1–2): 22. Jan 1994
- Name
- Oclloa
- Rank
- Genus
- Authors (Pub.)
- Erwin D. M.
Pfefferkorn H. W.
Alleman V.
- Publication
- Early seed plants in the Southern Hemisphere I [1994/1]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 80
- Issue
- 1–2
- Page number
- 22
- Year
- 1994
- Parent Taxon
- [Class] Moresnetiopsida
- Fossil Status
- insynangescences (wih ovules)
- Type
- Oclloa cesariana
- Diagnosis
- Preovules adpressions, acupulate, borne singly on slender, forked terminal axes of second order laterals arranged alternately along the first order
axis. Branch systems nonplanate; axes with longitudinal striations. Seeds elongate, truncate to slightly rounded at the base. Integument of 5-9 (10) lobes, fused only in basal one-half to two-thirds of seed; lobes extending distally as separate lanceolate arms, gradually incurved toward nucellar
apex; free lobe margins and inner surface (?) lined with narrow, irregular to club-shaped projections. Nucellus fused to integument only in the lower half to two-thirds of the nucellus; free apical region modified into dome-shaped pollen chamber and terminal lagenostome. Lagenostome very short, tubular, with slightly flared orifice.
Links by generics
Species
