Symplectromyces Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 75

Genus Symplectromyces Thaxt.

MB#5319

Memoirs of the American Academy of Arts and Sciences 13: 314 ( Thaxter 1908). –

Type species: S. vulgaris Thaxt. (by monotypy)

Brief description

Monoecious. Receptacle multicelled, ± symmetric, with cell II subdivided by horizontal septa into cells IIa, IIb, and a distal cell III ( Fig. 14C ) which divides repeatedly by oblique septa forming a secondary receptacle bearing many appendages and one to a few perithecia. Antheridia seriated in the appendages, with variably elongated efferent necks ( Fig. 14F ); sometimes replaced by sterile branchlets.

Remarks

Monotypic. The development of its single species was studied by Benjamin (1968, 1983). Shares the subtribe Teratomycetinae with Diplomyces , Idiomyces , Sandersoniomyces , and Teratomyces .

Figures

Fig. 14. A–B. Idiomyces peyritschii Thaxt. Mature thalli. – C–L. Symplectromyces vulgaris (Thaxt.) Thaxt. C. Mature thallus from Quedius umbrinus with labelled cells IIa, IIb, and III. D. Mature thallus from Quedius xanthopus. E. Mature thallus from Quedius mesomelinus. F–G. Details of appendages with seriated antheridia (G, in poor condition is from lectotype). H–J. Thalli from Quedius boopoides, with detail of dark cell VI in H (arrow). I. Mature thallus from lectotype slide. K. Ascospore. L. Very young thallus showing ascospore original spinous apex, the sx (arrow). Scale bars: A–B, G–H, J, L = 50 µm; C–E, I = 100 µm; F, K = 25 µm. Photographs from slides ZMUC C-F-122507 (A–B), ZMUC C-F-122498 (C), ZMUC C-F-122679 (D, K), ZMUC C-F-123742 (E–F), FH6581 (lectotype) (G, I), ZMUC C-F-123075 (H, J), ZMUC C-F-123521 (L).