Smittium, the most speciose genus of the "gut fungi" (Zygomycota: Trichomycetes), is found attached to the hindgut cuticle of larval aquatic Diptera. Smittium spp. colonize several host families (e.g., Smittium culisetae in Chironomidae, Culicidae and Simuliidae), but some species appear to be specific to a single host family (e.g., Smittium morbosum Sweeney in Culicidae). The specificity of Smittium spp. within a host family has been difficult to resolve. This research presents evidence that certain Smittium spp. differentially colonize particular species of black fly (Diptera: Simuliidae) hosts as measured by differences in prevalence, abundance and fecundity. Reasons for this differential occurrence and fecundity in hosts are unclear but might include fungal responses to variations in host morphology, physiology, distribution or behavior. Variable fitness of Smittium spp., within a suite of available hosts, could be a factor in the diversity of this fungal group.

译文

:Smittium是“肠道真菌”(Zygomycota:Trichomycetes)最特殊的属,被发现附着在幼虫水生双翅目的后肠表皮上。 mit在几个寄主家庭中定居(例如,Chironomidae,Culicidae和Simuliidae中的Smittium culisetae),但某些物种似乎对单个寄主家庭具有特定性(例如Culicidae中的Smittium morbosum Sweeney)。 Smittium spp的特异性。在寄宿家庭中很难解决。这项研究提供了某些Smittium spp的证据。通过患病率,丰度和繁殖力的差异来衡量,黑蝇(Diptera:Simuliidae)寄主的特定物种有不同的殖民地。宿主中这种差异发生和繁殖力的原因尚不清楚,但可能包括对宿主形态,生理,分布或行为变化的真菌反应。在一组可用宿主内,Smittium spp。的适应性可能是该真菌群多样性的一个因素。

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