Table V.
Tabulation of differentiating pollen features in the Psittacanthinae: Tripodanthus, Aetanthus, and Psittacanthus (Pollen Type B).
| Genus | Apertures | Size, shape | Outline in e.v. and p.v. | Equatorial apices | Margo | Exine features (LM) | Sculpturing |
|---|---|---|---|---|---|---|---|
| Tripodanthus acutifolius | Syn(3)colpate, colpi narrow | Small, distinctly oblate | Elliptic, concave-triangular | Truncated to T-shaped | Distinct, widening towards equatorial apices | Sexine thickened in MC; nexine triangular thickened in polar area | M: psilate MC: (Micro)baculate |
| T. belmirensis | Syn(3)colpate, colpi wide | Small to medium, distinctly oblate | Subrhomic, concave-triangular | Obcordate | Distinct | ? | M: psilate ? MC: micro-verrucate ? |
| T. flagellaris | Syn(3)colpate, colpi narrow |
Small, distinctly oblate | Not observed, concave-triangular | Truncated | Distinct, of equal width | ? | M: psilate; MC: (Micro)baculate |
| Aetanthus coriaceus, A. macranthus, A. nodosus | Syn(3)colpate | Medium, oblate | Elliptic, straight- or concave-triangular to trilobate | Rounded to obcordate | Distinct | Hexagonally thickened in polar area | M: mostly psilate, partly nano-/micro-baculate MC: nano-/micro-baculate |
| Psittacanthus acinarius | Zono(3)colpate, colpi short and narrow | Medium, distinctly oblate | Emarginate, convex-triangular | Obcordate | Distinct | ? | Granulate |
|
P. calyculatus, P. columbianus, P. clusiifolius, P. macranthus, P. schiedeanus, P. sonorae |
Syn(3)colpate, colpi narrow or wide | Small, medium, or large, (distinctly) oblate | Emarginate or elliptic, convex-(P. clusiifolius), straight- or concave triangular or trilobate | Obcordate or truncated (P. calyculatus, P. clusiifolius) | More or less distinct, widening towards equatorial apices (P. calyculatus) | None or ? | M: psilate if distinct or as MC; MC: nano- to micro-echinate |
| P. cucullaris, P. dilatatus, P. rhynchanthus | Zono(3)colpate, colpi narrow or lense-like, and medium-long | Medium or large, (distinctly) oblate | Emarginate or elliptic, concave-triangular to (modified) trilobate | Obcordate or rounded (P. dilatatus) | Distinct | None or ? | M: psilate; MC: nano- to micro-baculate/-echinate; AC: As MC, but SE less dense |
| P. hamulifer, P. peronopetalus | Demi(3)colpate, colpi narrow and medium-long | Large, distinctly oblate | Rounded | Not visible | ? | Uniform: micro-echinate | |
| P. robustus | Syn(3)colpate, medium-wide | Medium, oblate | Elliptic, convex-triangular | Obcordate | ? | ? | M: ? MC: psilate, partly granulate; minutely perforate |
Note: Abbreviations: e.v., equatorial view; p.v., polar view; M, margo; MC, mesocolpium; AC, apocolpium; SE, sculptural elements.