FIGURE 7. A–C in A cryptic palm-pitviper species (Squamata: Viperidae: Bothriechis) from the Costa Rican highlands, with notes on the variation within B. nigroviridis

FIGURE 7. A–C. Variation among interoculabial scales between supralabials and suboculars. (A) Bothriechis nubestris (UCR 12356) displaying two complete rows of interoculabial scales between supralabials and suboculars. (B) Bothriechis nigroviridis (UCR 16518) displaying a single row of scales between supralabials and suboculars. (C) Bothriechis nigroviridis (UCR 15428) displaying partial rows of scales between supralabials and suboculars.