Dasyspora amazonica Beenken

Gomes, Gardênia Figueiredo, Sotão, Helen Maria Pontes, Dealmeida, Layse Barreto, França, Isadora Fernandes De & Monteiro, Josiane Santana, 2025, Dasyspora (Pucciniales) on Xylopia in the Amazon, with new distribution records for Brazil, Phytotaxa 697 (1), pp. 68-82 : 75-76

Dasyspora amazonica Beenken , in Beenken, Zoller & Berndt, Mycologia 104(3): 676 (2012). Figs. 5 , 9A

Holotype: on Xylopia cf. amazonica , Brazil, Amazonas , Paraiso , Rio Madeira, 03 August 1923, J. R. Weir ( BPI US0116382 ). Mycobank number: 519391.

Spermogonia subepidermal, group VI, type 5. Aecia and uredinia unknown. Telia abaxial on leaves, erumpent, dark brown, densely aggregated in yellowish spots arranged in more or less concentric circles (3–6 × 3–7 mm). Paraphyses rare, peripheral, clavate at the tips. Teliospores 2-celled, ellipsoid (15–27.5 × 12.5–17.5 µm), septum transverse (2–3 µm in medium focus); wall ornamented with flattened, polygonal warts (0.7–1 µm) that become larger near the septum (1.3–2 µm), forming two horizontally elongated rows; apical and basal rod-like projections branched at the tip (1.5–4 × 0.9–1.5 µm); pedicel fragile, hyaline, generally brittle.

Specimens examined:— BRAZIL. PARÁ: Altamira , on Xylopia cf. amazonica , 14 September 2017, I. França et al. 2017-537 ( MG180446 ) ; MATO GROSSO: Nobres , on X. amazonica , 19 September 1980, W. Thomas, J. Guedes & R. P. Lima ( MG121712 ) .

Host and distribution in South America:— On leaves of X. amazonica ; Amazonas ( Beenken et al. 2012). In this study, we present new records for the states of Mato Grosso and Pará.

Comments:— This species differs from all other species of Dasyspora by having the smallest teliospores in the genus, measuring 15–27.5 × 12.5–17.5 µm. The teliospores observed in the present study were smaller than those of the type specimen from Amazonas State, described by Beenken et al. (2012), which measured 25–30 × 18–21 µm. Only the type species of D. amazonica had been previously recorded ( Beenken et al. 2012). The host species X. amazonica has a known geographic distribution in South America, in Colombia, Surinam, Venezuela, and Brazil (Acre, Amazonas, Pará, Rondônia, Mato Grosso) (Flora and Funga from Brasil 2024, Plants of the World Online 2024). A general discussion of Dasyspora species in the neotropics is presented in the comments of D. gregaria .

Figures

FIGURE 5. Dasyspora amazonica. A–B. Telia on Xylopia amazonica. A. Telia in stereomicroscope; B. Telia in SEM; C. Teliospores in OM; D. Teliospores in SEM. Bars: A= 1 mm, B= 50 µm, C, D= 10 µm.

FIGURE 9. Teliospores from specimens of the Dasyspora winteri clade from the Amazon in OM and SEM. A) D. amazonica (MG 180446), B) D. nitidae (MG 173301), C) D. ferrugineae (MG 173304). Bars: 10µm.