Micridium rhodeanum ( Casey, 1924 )
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publication ID |
https://doi.org/ 10.11646/zootaxa.4242.2.2 |
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publication LSID |
lsid:zoobank.org:pub:0DD1868D-4EF5-4FB7-AEE9-372644800A79 |
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DOI |
https://doi.org/10.5281/zenodo.6045225 |
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persistent identifier |
https://treatment.plazi.org/id/03E64B08-E339-FFE6-8585-5F74FCFAEA08 |
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treatment provided by |
Plazi |
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scientific name |
Micridium rhodeanum ( Casey, 1924 ) |
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Micridium rhodeanum ( Casey, 1924) View in CoL as Dilinium rhodeanum
( Figs. 5 View FIGURES 1 – 14 , 30 View FIGURES 17 – 32 , 60 View FIGURES 47 – 60 , 71 View FIGURES 61 – 71 , 90a, 90b, 99)
Micridium rhodeanum (Casey) ; Johnson (2001)
Habitus Fig. 5 View FIGURES 1 – 14 . Length 0.65 mm. Colour yellow brown, legs and antennae yellow. Antennomeres 3–11 length 0.22 mm. Width across eyes 0.19 mm. Mentum narrowed towards base, lateral margins straight. Pronotum 0.25 mm wide, 0.19 mm long, with two distinct elongate depressions reaching from the posterior margin to just past the middle, the distance between them narrowing anteriorly; sides slightly sinuate before hind angles, Fig. 30 View FIGURES 17 – 32 . Elytra 0.40 mm long, 0.30 mm wide, widest just in front of middle. Mesoventrum: keel narrow between mesocoxae, collar with two short ridges extending posteriorly between the keel and the mesepiventral ridges which are faint, mesepiventra without obvious reticulation Fig. 60 View FIGURES 47 – 60 . Metaventrum: metepiventral sutures faint, angled inwards and extending half way to posterior margin Fig. 71 View FIGURES 61 – 71 ; intercoxal process evenly rounded with comb of +/- 24 narrow setae Fig. 99. Wings of usual ptiliid type.
Male: aedeagus Figs. 90a/b.
Remarks. Five Casey syntypes (labelled as ‘paratypes’; designated as paralectotypes by Sörensson) ( Fig. 5 View FIGURES 1 – 14 ) were borrowed for study from the Smithsonian Institution , Washington DC, USA. One was remounted as a disarticulated slide in Euparal on a piece of acrylic attached to the pin and a male and female remounted on cards for examination in the SEM. No genitalia were detected in the female and further dissections were not carried out on the other very fragile specimens for the reasons given above.
I have also seen what appear to be two further examples of this species mounted on a single card, collected by R.Coleman in Fairfield Township , Sank Co., Wisconsin, USA, 30 Oct. 1953, in leaf mould and bearing the determination label ' Micridium sp. Dybas & Johnson' (MM).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.