Observation 71812: Entomophthora syrphi

When: 2011-07-17

Collection location: Blackstone, Massachusetts, USA [Click for map]

Who: Jason Karakehian (Jason Karakehian)

Specimen available

This was found on the gills of Lactarius corrugis. At the time the insect was completely enveloped in a mass of conidiophores and conidia as seen in the pictures here. Today however, the condiophores seem to have collapsed and the conidia dispersed allowing me to see the characteristics of the insect host which is about 3-4mm long. I don’t know if this is because the specimen may have dried out a little? I think the insect is Melanostoma mellinum. I thought I’d post these pictures for comment until I can find a description of E. syrphi and compare my observations.

Species Lists


The globular structures are the spores of Lactarius corrugis, not resting spores.

Proposed Names

27% (1)
Eye3 Eyes3
Used references: PCR-RFLP is used to investigate relations among species in the entomopathenogenic genera Eryniopsis and Entomophaga by Ann E. Hajek et al. Mycologia 95(2), 2003, pp.262-268
Based on microscopic features: 10 conidia avg. 18×10micrometers and are ovoid in shape. I’m not sure if they are primary or secondary spores

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Danny Newman (myxomop)
2014-01-24 02:58:18 PST (-0800)

very likely Chymomyza amoena, which is known to frequent mushrooms. the two dark bands on the wings, red eyes and red thorax are diagnostic. knowing the size of the host could be helpful. C. amoena is a third the size of syrphids.

ref: M Hauser, CDFA

holy macro, batman!
By: Danny Newman (myxomop)
2011-07-18 17:58:04 PDT (-0700)

nice close-ups!

Created: 2011-07-18 15:24:50 PDT (-0700)
Last modified: 2011-07-18 15:28:54 PDT (-0700)
Viewed: 90 times, last viewed: 2018-07-05 16:28:33 PDT (-0700)
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