Cantharomyces Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 310-311

publication ID

https://doi.org/ 10.5852/ejt.2021.781.1583

DOI

https://doi.org/10.5281/zenodo.5835001

persistent identifier

https://treatment.plazi.org/id/03D3878A-B664-FED2-673C-7FCFD907FCEB

treatment provided by

Felipe

scientific name

Cantharomyces Thaxt.
status

 

Genus Cantharomyces Thaxt. View in CoL View at ENA

MB#792

Proceedings of the American Academy of Arts and Sciences 25: 9 ( Thaxter 1890). –

Type species: C. bledii Thaxt. View in CoL

Brief description

Monoecious. Receptacle three-celled, with the three cells (I, II and III) superposed and separated by ± horizontal septa. Primary appendage consisting of a basal cell which divides to form a compound antheridium and a few to many sterile cells. Above, the appendage may be simple to variably branched. Antheridium consisting of several irregularly arranged cells; the discharging pore is lateral. Perithecium with 4–5 cells in each vertical row of outer wall cells.

Remarks

The genus consists of 29 species, of which 13 are known in Europe, eight in Denmark. The most recently described species are C. elongatus ( Haelewaters & De Kesel 2013) and C. paschalis W.Rossi & Santam. ( Haelewaters et al. 2021) . The genus is well-characterized by the compound antheridium which occupies part of the appendage basal cell ( Fig. 75F View Fig , an).

Key to the Danish species (partially following Majewski 1994b and Santamaria 2003)

1. Cell II almost entirely blackened...................................................................................................... 2

– Cell II not so blackened, although some pigment, darkening or black spots may be present .......... 3

2. Antheridium lateral on the appendage basal cell, which is narrower than cell III. Appendage unbranched. On Dryops View in CoL (Col. Dryopidae View in CoL )......................................................... C. denigratus Thaxt. View in CoL

– Antheridium occupying most of the appendage basal cell, which is almost spherical and broader than cell III. Appendage branched above the basal cell. On Thinodromus Kraatz, 1857 View in CoL (Col. Staphylinidae View in CoL Oxytelinae ) ......................................................................................................... C. numidicus Maire View in CoL

3. Primary appendage unbranched........................................................................................................ 4

– Primary appendage ± branched......................................................................................................... 5

4. Appendage basal cell, including antheridium, elongated, narrow. On Dryops View in CoL (Col. Dryopidae View in CoL ) ....... .................................................................................................................................. C. italicus Speg. View in CoL

– Appendage basal cell, including antheridium, rounded or convex distally, broader than long. On Syntomium Curtis, 1828 View in CoL (Col. Staphylinidae View in CoL Oxytelinae )............ C. elongatus Haelew. & De Kesel View in CoL

5. Antheridium occupying the middle side of appendage basal cell, without contacting upper and lower septa. On Platystethus Mannerheim, 1830 View in CoL (Col. Staphylinidae View in CoL Oxytelinae ) ..... C. platystethi Thaxt. View in CoL

– Antheridium occupying the corner or a lateral of the appendage basal cell, reaching either the upper and/or the lower septa....................................................................................................................... 6

6. One to three cells above the appendage basal cell strongly flattened, inflated, separated by constricted and slightly darkened septa. On Aploderus Stephens, 1833 View in CoL (Col. Staphylinidae View in CoL Oxytelinae ) .......................................................................................................... C. aploderi Huldén View in CoL

– Otherwise.......................................................................................................................................... 7

7. Cell III longer than broad. Appendage basal cell showing a papilla on the upper-inner corner, which probably represents an efferent neck. Cell VI elongate and strongly narrowing towards the basal portion. On Bledius View in CoL (Col. Staphylinidae View in CoL Oxytelinae )......................... C. papillatus Santam. View in CoL sp. nov.

– Cell III broader than long. Appendage basal cell without papilla. Cell VI not as above. Usually on Trogophloeus Mannerheim, 1831 and allied genera (Col. Staphylinidae View in CoL Oxytelinae )........................ .............................................................................................................................. C. orientalis Speg. View in CoL

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