Dothideomycetes » Vizellaceae » Acarella

Acarella costaricensis

Acarella costaricensis Syd. Annls mycol. 25(1/2): 123 (1927)                                                                          Fig. 1

 

Index Fungorum number: IF 262145; Facesoffungi number: FoF 06207

Parasitic or epiphytic on the surface of living leaves of Phoebe costaricanus. Sexual morph: Undetermined. Asexual morph: Conidiomata 58–110 µm high × 36–130 µm diam., ( = 20.5 × 4 µm, n = 10), pycnidial, hypophyllous, dark brown to black, superficial, in groups with irregular margins, sometimes sparsely scattered or not entirely distributed on surface of leaves. Conidiophores 11–26 µm high, 3–5 µm wide (  = 20.5 × 4 µm, n = 10) straight or slightly curved, hyaline, reduced to conidiogenous cells. Conidiogenous cells phialidic or enteroblastic percurrent, cylindrical to elliptical, septate, rough and thick-walled. Conidia 5–6 × 2–3 µm (  = 5 × 3 µm, n = 10), ellipsoidal to cylindrical, solitary, hyaline to olivaceous-brown, 1-septate, apparently with 2-guttules.    

 

Material examined – COSTA RICA, Central America, San Pedro de San ramon, Provincia de San José on Phoebe costaricanus sp. (Lauraceae), 23 January 1925, H. Sydow (E00455227, holotype).

 

Economic significance – The genus Acarella consist of species with neotropical distribution and form stalked appressoria. They infect the host manifesting as dark brown spots on leaf surfaces (Hofmann 2009). There is no molecular data available for the taxon.

 

 

 

Figure 1 Acarella costaricensis (E00455227, holotype). ac Herbarium specimen and habit on leaf. d Section of conidioma. eh Conidiogenous cells and conidiogenesis. in Conidia. Scale bars: c = 500 μm, d = 100 μm, eh = 10 μm, in = 5 μm.

 

Reference

Hofmann TA. 2010 – Plant parasitic Asterinaceae and Microthyriaceae from the Neotropics (Panama). PhD Thesis. Frankfurt am Main, Johann Wolfgang Goethe University, p 408.

 

About Dothideomycetes

The website Dothideomycetes.org provides an up-to-date classification and account of all genera of the class Dothideomycetes.

Mushroom Research Foundation

Contact



Published by the Mushroom Research Foundation 
Copyright © The copyright belongs to the Mushroom Research Foundation. All Rights Reserved.