Hesperomyces virescens

Hesperomyces virescens

Hesperomyces virescens is a parasitic fungus on various species of ladybirds, lately most notably on Harmonia axyridis.
Hesperomyces virescens on Harmonia axyridis This ladybug has a parasitic fungus, Hesperomyces virescens, growing on its elytra. The fungus spreads during mating and through encounters with infected ladybugs; it can easily spread among ladybugs overwintering in groups. Despite the probable discomfort and sometimes impairments to movement, most infected ladybugs lead full and happy lives.

Habitat: Attracted to a light at night in a rural area. Beetle hangers,Geotagged,Harmonia axyridis,Hesperomyces,Hesperomyces virescens,Laboulbeniales,Summer,United States,fungus,ladybug with fungus,parasitic fungi

Appearance

Hesperomyces virescens can be recognized by these characters (among others):
- Perithecium: there are a few lobes at the bottom - two smaller ones and two larger.
- Antheridia: simple, typically 2+4, typical shape with "long neck"
Hesperomyces virescens on Harmonia axyridis Details of Laboulb here:
https://www.jungledragon.com/image/78989/hesperomyces_virescens.html Harmonia axyridis,Hesperomyces,Hesperomyces virescens,Laboulbeniales,nl: Aziatisch lieveheersbeestje

Reproduction

The fungus completes its life cycle entirely on the host's integument. Individual thalli (fruiting bodies) are formed directly from ascospores. Location and frequency of these thali suggest that the spores are most probably transmitted by direct contact between individuals, such as during mating.

References:

Some text fragments are auto parsed from Wikipedia.

https://en.wikipedia.org/wiki/Hesperomyces

Ceryngier, P; Twardowska, K. (2013) Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review. - European Journal of Entomology, vol.110, pp.549-557.
https://www.eje.cz/pdfs/eje/2013/04/01.pdf


Haelewaters, Danny; Minnaar, Ingrid A.; Clusella-Trullas, Susana () First finding of the parasitic fungus Hesperomyces virescens (Laboulbeniales) on native and invasive ladybirds (Coleoptera, Coccinellidae) in South Africa.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4748155/pdf/parasite-23-5.pdf

Haelewaters D, De Kesel A. (2017) De schimmel Hesperomyces virescens, een natuurlijke vijand van lieveheersbeestjes. Entomologische Berichten, vol.77(3), pp.106-118.
http://www.dannyhaelewaters.com/wp-content/uploads/2017/07/Haelewaters-De-Kesel-2017-De-schimmel-Hesperomyces-virescens-een-natuurlijke-vijand-van-lieveheersbeestjes.pdf
Taxonomy
KingdomFungi
DivisionAscomycota
ClassLaboulbeniomycetes
OrderLaboulbeniales
FamilyLaboulbeniaceae
GenusHesperomyces
SpeciesHesperomyces virescens