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Atelocauda shivasii J. Walker

Description
Spermogonia on upper leaf surface, subepidermal, erumpent.

Uredinia on lower leaf surface, subepidermal, erumpent, round or ellipsoidal, up to 0.5 mm, glossy brown, peridium present.

Urediniospores rhomboidal, apex acute or obtuse, yellowish brown to reddish brown, 25‒38 × 20‒26 µm; wall 1‒1.5 µm thick, apex unthickened, echinulate, with 1‒2 scattered germ pores.

Telia on lower leaf surface with uredinia, subepidermal, erumpent, dome-shaped, glossy brown, peridium present.

Teliospores oval, fusiform or clavate, yellowish brown, 34‒50 × 16‒20 µm; wall less than 1 µm thick at sides, 2‒3 µm thick near rounded apex, with 3‒6 apical digitate projections 5‒9 µm long, apical pore 4‒6 µm diam., smooth; pedicel persistent, up to 25 µm long.

Basidia cylindrical, hyaline, 40‒45 × 8‒9 µm.

Basidiospores globose, 11‒13 × 9‒13 µm.

Hosts
Host family: Fabaceae
Host species: Ormosia ormondii

Distribution
QLD

Comments
Atelocauda shivasii was described by Walker (2001) and likened to A. incrustans, the type species of Atelocauda on Lonchocarpus (Fabaceae) from Panama. The teliospores of A. shivasii resemble those in species of Endoraecium, which are readily distinguished from A. shivasii by the reticulate urediniospores.

Highslide JS
Atelocauda shivasii on Ormosia ormondii - BRIP 61309.
Highslide JS
Spermogonia of Atelocauda shivasii on upper leaf surface of Ormosia ormondii - BRIP 52575.
Scale bar = 5 mm.
Highslide JS
Uredinia of Atelocauda shivasii on Ormosia ormondii - BRIP 52575.
Scale bar = 5 mm.
Highslide JS
Spermogonium of Atelocauda shivasii on Ormosia ormondii - BRIP 52575.
Scale bar = 100 µm.
Highslide JS
Urediniospores of Atelocauda shivasii on Ormosia ormondii - BRIP 52575.
Scale bar = 10 µm.
Highslide JS
Urediniospores of Atelocauda shivasii on Ormosia ormondii - BRIP 61309.
Scale bar = 10 µm.
Highslide JS
Teliospores of Atelocauda shivasii on Ormosia ormondii - BRIP 61309.
Scale bar = 10 µm.