Tetracladium species

Kravetz, Sebastián, González, Beatriz, Marano, Agostina & Giorgi, Adonis, 2018, The genus Tetracladium in Pampean streams (Buenos Aires, Argentina), Phytotaxa 338 (3), pp. 276-284 : 281

Key for the identification of Tetracladium species from Pampean streams

1 Symmetric conidia with branches arranged in five levels on the axis ..................................................................... Tetracladium sp.

1´Asymmetric conidia with branches arranged in fewer than three levels on the axis ......................................................................... 2

2 Conidia with two globose and two or three acicular elements................................................................................ T. marchalianum

2´Conidia without globose or acicular elements.................................................................................................................................... 3

3 Conidia with two digitiform elements that form a v-shaped fork and two or three acicular elements (4–5 apices)........ T. furcatum

3´Conidia with three digitiform, two acicular and one filiform elements ............................................................................................. 4

4 Axis ≤21 μm, digitiform branch at the second level of the axis arranged on the same side as the digitiform element at the first level ......................................................................................................................................................................................... T. breve

4´Axis ≥28 μm, digitiform branch at the second level of the axis arranged opposite to the digitiform element at the first level .......... ......................................................................................................................................................................................... T. setigerum