01916nas a2200217 4500008004100000245011000041210006900151260000900220300001100229490000900240520120900249653001801458653002801476653001801504653002401522653002601546653003301572100001901605700001501624856005901639 1980 eng d00aSurvey of the Microcoryphia (Insecta) of the northeastern United States and adjacent provinces of Canada.0 aSurvey of the Microcoryphia Insecta of the northeastern United S c1980 a1 - 170 v27013 a

A survey of the Microcoryphia of New York,

New Jersey, and Pennsylvania as well as the New

England states and the Canadian provinces of

New Brunswick, Nova Scotia, and Newfoundland

showed four species present. Petrobius brevistylis

and Trigoniophthalmus alternatus were

probably introduced from Europe on ballast; Pedetontus

saltator, new species, and Machiloides

petauristes, new species, are native. Petrobius

canadensis Paclt, 1969, is synonymized with Petrobius

brevistylis Carpenter, 1913. The presence

of Petrobius maritimus (Leach) in North America

is not confirmed. Machilis variabilis Say, described

from "North America," is not identifiable.

Males were not found among the hundreds of

specimens of North American Trigoniophthalmus

alternatus examined, making a parthenogenetic

mode of reproduction highly likely. Males were

rare in Petrobius brevistylis (approximately 3 percent

of all specimens examined), and were not

discovered among the limited material of the new

species of Pedetontus and Machiloides.

10aArchaeognatha10aMachiloides petauristes10aMicrocoryphia10aPedetontus saltator10aPetrobius brevistylis10aTrigoniophthalmus alternatus1 aWygodzinsky, P1 aSchmidt, K uhttp://digitallibrary.amnh.org/dspace/handle/2246/538701158nas a2200157 4500008004100000245013100041210006900172260000900241300001400250490000800264520062100272653002300893653002500916100002100941856003800962 1995 eng d00aPedetontus gershneri, a new species of Machilidae from the interior highlands of North America (Insecta: Microcoryphia)0 aiPedetontus gershnerii a new species of Machilidae from the inte c1995 a195 - 1980 v1063 a

Pedetontus gershneri, a new species of Microcoryphia, is described from Magazine Mountain, Logan County, Arkansas. The new species was found in leaf litter in dense deciduous forest. The presence of 2 pairs of exsertile vesicles on urosternites Il-V indicates a close relationship with Pedetontus species in western North America. Labial and maxillary palpi characters distinguish P. gershneri from its western relatives. Machiloides banksi, recorded for the first time from Arkansas, is found in more xeric habitats under rocks on the south facing slope of the mountain.

10aMachiloides banksi10aPedetontus gershneri1 aAllen, Robert, T uhttp://biostor.org/reference/3505