Tetracladium breve A. Roldán, Mycol. Res.

Kravetz, Sebastián, González, Beatriz, Marano, Agostina & Giorgi, Adonis, 2018, The genus Tetracladium in Pampean streams (Buenos Aires, Argentina), Phytotaxa 338 (3), pp. 276-284 : 279

Tetracladium breve A. Roldán, Mycol. Res. 93: 455 (1989). (Fig. 3a–i)

Conidia with three digitiform, two acicular and one filiform elements. Filiform element sharp and conspicuously longer than the digitiform branches. Central axis 14–22 × 1.5–2.5 μm, with basal extension and a distal digitiform element. The digitiform branch at the second level may appear indistinctly to the right or to the left of the axis.

Specimens examined:— Buenos Aires, Exaltación de la Cruz, De la Cruz stream, 34° 21´39.024´´ S, 59° 11´29.845´´ W, 0–50 m, 15 September 2017, Kravetz, S. 98 (slide BAFC 52785 ) ; General Las Heras, Morales stream, 34° 27´50.47´´ S, 59° 15´1.957´´ W, 0–50 m, 28 August 2017, Kravetz, S. 72 (slide BAFC 52786 ) ; Carmen de Areco , La Guardia stream, 34° 21´28.793´´ S, 59° 48´11.491´´ W, 0–50 m, 7 April 2017, Kravetz, S. (slide UNLu 41) ; Lobos, Salgado stream, 35° 08´29.825´´ S, 59° 05´36.607´´ W, 0–50 m, 15 November 2016, Kravetz, S. (slide UNLu 30) .

Notes:— This is the first report of the species in Argentina. In general, most of the characteristics of our material are in agreement with Roldán (1989). Tetracladium breve has conidia similar to T. setigerum , although smaller, and the digitiform branch at the second level may appear indistinctly to the right or to the left of the axis ( Roldán 1989).