First confirmed species record of Hydroscaphidae from Peru: description of a new species of Yara Reichardt and Hinton, and key to species (Coleoptera: Hydroscaphidae).

The Hydroscaphidae ("skiff beetles") is a family of minute aquatic beetles within the suborder Myxophaga comprising four genera: Hydroscapha Le Conte, 1874; Scaphydra Reichardt, 1973; Yara Reichardt Hinton, 1976 and Confossa Short et al., 2015. All genera are found within the Neotropical region, with the exception of Hydroscapha, which is widespread.

Clines in traits compared over two decades in a plant hybrid zone.

Background And Aims: Clines in traits across hybrid zones reflect a balance between natural selection and gene flow. Changes over time in average values for traits, and especially the shapes of their clines, are rarely investigated in plants, but could result from evolution in an unstable hybrid zone. Differences in clines between floral and vegetative traits could indicate different strengths of divergent selection.

Novel approach to heritability detection suggests robustness to paternal genotype in a complex morphological trait.

Heritable variation is essential for evolution by natural selection. In Neotropical army ants, the ecological role of a given species is linked intimately to the morphological variation within the sterile worker caste. Furthermore, the army ant is highly polyandrous, presenting a unique opportunity to explore heritability of morphological traits among related workers sharing the same colonial environment.