Micridium lineatum ( LeConte 1863 )

Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, Zootaxa 4242 (2), pp. 233-254 : 247

publication ID	https://doi.org/ 10.11646/zootaxa.4242.2.2
publication LSID	lsid:zoobank.org:pub:0DD1868D-4EF5-4FB7-AEE9-372644800A79
DOI	https://doi.org/10.5281/zenodo.6045212
persistent identifier	https://treatment.plazi.org/id/03E64B08-E326-FFFA-8585-58D5FEE7EC8A
treatment provided by	Plazi
scientific name	Micridium lineatum ( LeConte 1863 )
status

Treatment

Micridium lineatum ( LeConte 1863) View in CoL as Ptenidium lineatum

( Figs. 4 View FIGURES 1 – 14 , 32 View FIGURES 17 – 32 )

Micridium lineatum Motschulsky 1869 View in CoL

Habitus Fig. 4 View FIGURES 1 – 14 . Length 0.53 mm. Colour dark yellowish brown, antennae light yellow. Antennomeres 3–11 length 0.16 mm. Width across eyes 0.17 mm. Head punctured and pubescent. Pronotum length 0.16 mm, width 0.21 mm, widest in middle, punctured and pubescent throughout, lateral margins slightly sinuate before hind angles Fig. 32 View FIGURES 17 – 32 . Elytra length 0.34 mm, width 0.25 mm, punctured and pubescent throughout as pronotum. Wings visible through elytra.

Remarks. The description, figure and measurements are taken from the syntype of Micridium lineatum Motschulsky in BMNH. This is mounted on a small piece of clear mica(?) and includes a few fragments of a second specimen now lost. Labels are present as follows: ' Micridium lineatum' (apparently in Matthews' hand, a third word is deleted); ' Micridium lineatum , Type from Motschulsky, N. America, 19, 1865' (in Matthews' hand on a light green card with the rear corners cut off); '1586, 1587' (Matthews/Mason collection numbers); 'Matthews coll. 1904 - 120' (BMNH accession number) and 'Syntype' (added by BMNH) ( Fig. 4 View FIGURES 1 – 14 ). A second specimen in the BMNH bearing a red label inscribed in Matthews' hand ' Micridium lineatum' and a Matthews/Mason number '3762' is not conspecific with the syntype. The holotype of Ptenidium lineatum LeConte is in the Museum of Comparative Zoology, Harvard University, USA (imaged at http://mczbase.mcz.harvard.edu/guid/ MCZ:Ent:6629).

Details of the ventrum, viewed through the mount, were not sufficiently clear to enable positive determination to Micridium and for the reasons given above no attempt was made to detach the insect or to dissect it so that the sex is not known.