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Page number:91 
Remarks (internal):Stilbella aterrima is macroscopically indistinguishable from Stilbella clavulata, but can easily be distinguished by the globose to subglobose conidia and shorter, broader phialides. The teleomorph of S. aterrima is unknown, although verruculose 1-septate spores, possibly ascospores of a teleomorph similar to Nectria macrostoma and N. gracilipes, have been noted enmeshed in the synnemata of some collections.
Notes on synonyms: In the original description of Stilbella cinerea Torrend, two collections were mentioned. Only one was found in BR, and this has been designated lectotype above. All the synnemata in this collection are decapitated, but from the ornamenting cells on the stipe and the measurements for conidia given in the protologue, the identity of this species can be ascertained.
Stilbellula indica is listed above as a synonym of S. aterrima. The only other species of Stilbellula, the type species S. pallida Boedijn, is somewhat of a mystery. The holotype (BO) consists of microscope slides and reveal the fungus to be exactly as figured (see Morris, 1963). Details of conidium ontogeny, however, could not be observed. The fungus should certainly be recognizable if rediscovered, but for the present its systematic position is uncertain. It does not appear to be related to Doratomyces, as was suggested by Carmichael et al. (1980).
 
Description type:Non-original description 
Description:Stilbella aterrima (Welw. & Curr.) Seifert, comb. nov. - Fig. 28 e-h.
Stilbum aterrimum Welw. & Curr. - Trans. Linn. Soc. Lond. 26: 291. 1870 (basionym) = Graphium aterrimum (Welw. & Curr.) Sacc. - Syll. Fung. 4: 611. 1886 = Ceratopodium aterrimum (Welw. & Curr.) O. Kuntze - Rev. Gen. Pl. 2: 847. 1891.
Stilbum leucocephalum Berk. & Curt. Grevillea 3: 64. 1874. = Graphium leucocephalum (Berk. & Curt.) Sacc. - Syll. Fung. 4: 611, 1886 (non G. leucocephalum (Wallr.) Sacc. - Syll. Fung. 4: 615. 1886) = Graphium curtisii Sacc. - Syll. Fung. 4: 808. 1886 (name change) = Ceratopodium curtisii (Berk. & Curt.) O. Kuntze - Rev. Gen. Pl. 2: 847. 1891 = Graphium albonigrescens Lindau - Rabenh. Krypt.-Fl. 1, Pilze 9: 362. 1910 (second name change).
Stilbella cinerea Torrend apud De Wildeman - Bull. Jard. bot. natn. Belg. 4: 13. 1914.
Phialographium deightonii V. Rao & B. Sutton - Kavaka 3: 26. 1975.
Stilbellula indica Chouhan & Panwar - Curr. Sci. 49: 330. 1980.
Teleomorph: Unknown.
Synnemata scattered, gregarious or 2-8 caespitose, sometimes erumpent, subulate-capitate, cylindrical-capitate or clavate, straight, nodding or sinuous, of medium to slender stature, unbranched or with a basal or median dichotomous branch, smooth but granulose in upper one half to one third of stipe, black, grey or white in granulose zone, 1-2.5 mm tall, 50-175 µm wide, to 250 µm wide at base. Hyphae of stipe dark brown, 3-5 µm wide with walls thin or up to I µm thick. Ornamenting cells globose to ellipsoidal, lateral or terminal on marginal hyphae, sessile or sometimes in branched or unbranched chains up to 6 cells long, echinulate to verrucose, 3-7.5 x 3-5 µm, walls sometimes slightly thickened. Conidiophore branching usually once monochasial, or monoverticillate, sometimes twice monochasial, metulae when present 7-10 x 2.5-3 µm, conidiophores 2.5-3.5 µm wide. Phialides cylindrical to slightly lageniform, lateral and terminal or in terminal whorls of 3-4, 6-15 µm long, 2-3 µm wide, collarettes sometimes slightly flared, periclinal thickening obvious. Conidial mass opaque olive-green, grey to almost black, globose or ellipsoidal, 75-300(-700) µm diam. Conidia globose to subglobose, 2.5-4 x (2-)2.5-3.5 µm, with slightly thickened walls.
Habitat: Bark.
Distribution: Probably widely distributed in the tropics and subtropics but rather rare. Recorded here from Africa (Angola, Sierra Leone, Zaire), S Asia (India), North America (South Carolina).
 
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