Genus Obtusicranus Bartlett, 2006
Distribution: Southwest USA and Mexico..
Type species (in original combination): Obtusicranus bicarinus Bartlett, 2006.
There are two species currently placed in this genus.
Obtusicranus bicarinus Bartlett, 2006 - USA: Arizona, Colorado, Utah
Obtusicranus bifidus Bartlett, 2010 - Mexico
Obtusicranus bifidus Bartlett, 2010 - Bromus exaltatus Bernh. (Pooaceae: Pooideae: Bromeae).
Economic Importance: Limited. Both species are uncommonly encountered.
New World Stenocraninae were recently reviewed by Bartlett (2010), including a key to genus.
Obrusicranus has its head projected in front of the eyes to a greater degree than Stenocranus, but less than Frameus or Tanycranus. The median carina of the frons is paired (single in Kelisicranus and Stenocranus), and the head is blunt in lateral view.
Obtusicranus bifidus is larger (~5.3-5.7mm vs. 4.1-4.8mm) than O. bicarinus and has a pale vitta on the mesothorax; O. bifidus also has two processes from the phallobase instead of one in O. bicarinus.
Bartlett, C. R. 2010 (dated 2009). Diversity in New World Stenocranine Planthoppers (Hemiptera: Delphacidae). Transactions of the American Entomological Society 135(4): 443-486.
Bartlett, C. R. 2006 (dated 2005). Two new genera and species of stenocranine planthoppers (Hemiptera : Delphacidae) from North America. Entomological News 116(5): 291-303.
Urban J. M. C. R. Bartlett, and J. R. Cryan. 2010. Evolution of Delphacidae (Hemiptera: Fulgoroidea): combined-evidence phylogenetics reveals importance of grass host shifts. Systematic Entomology 35(4): 678-691.