Bergdahl James C, Kavanaugh David H
Conservation Biology Center, University of the Wilderness, 919 S. Adams St., Spokane, WA 99204, U.S.A.
Zookeys. 2011(104):77-96. doi: 10.3897/zookeys.104.1272. Epub 2011 Jun 13.
Two new species of Pterostichus Bonelli subgenus Pseudoferonina Ball, are described from the mountains of central Idaho: Pterostichus bousqueti Bergdahl [type locality = small tributaries of South Fork of Payette River watershed, ca. 1170 m (3840 ft), 44.0675°; -115.6822°, near Lowman, Salmon River Mountains, Boise County, Idaho, U.S.A.] and Pterostichus lolo Bergdahl [type locality = Cottonwood/Orogrande Creek, ca. 870 m (2850 ft), 46.5528°; -115.5522°, North Fork of Clearwater River watershed, Clearwater Mountains, near Bungalow, Clearwater County, Idaho, U.S.A.]. Males of Pterostichus bousqueti and Pterostichus lolo are easily distinguished from each other and the seven previously described Pseudoferonina species by the form of the median lobe of the aedeagus, and from most individuals of the other species of Pseudoferonina in Idaho by features of pronotal shape and macrosculpture. Both species appear to be obligate ripicolous hygrophiles, restricted in distribution primarily to the margins of small montane streams in forested areas. Widespread intensive stream surveys for Pseudoferonina over many years indicate the geographic ranges of both species are highly localized, and additional undescribed species may occur in Idaho.
布氏步甲Pterostichus bousqueti Bergdahl [模式产地 = 佩耶特河流域南支流的小支流，海拔约1170米（3840英尺），北纬44.0675°；西经 -115.6822°，靠近美国爱达荷州博伊西县鲑鱼河山脉的洛曼] 和洛洛步甲Pterostichus lolo Bergdahl [模式产地 = 三角叶杨/奥罗格兰德溪，海拔约870米（2850英尺），北纬46.5528°；西经 -115.5522°，位于美国爱达荷州清水县平房附近清水山脉清水河北支流流域]。布氏步甲和洛洛步甲的雄性个体很容易通过阳茎中叶的形态相互区分，也能与之前描述的七种伪费罗步甲物种区分开来，并且在爱达荷州，它们与伪费罗步甲属其他物种的大多数个体在背板形状和宏观雕刻特征上也有所不同。这两个物种似乎都是专性的喜湿河岸昆虫，分布主要局限于林区小山间溪流的边缘。多年来对伪费罗步甲进行的广泛密集溪流调查表明，这两个物种的地理范围都非常局限，爱达荷州可能还存在其他未描述的物种。
