Dimorphism
Guides
Chaitophorus
Poplar aphids, Willow aphids
Chaitophorus is a genus of aphids comprising approximately 90–110 species distributed across North America, Europe, and Asia. Members are primarily associated with Salicaceae hosts, particularly Populus (poplars) and Salix (willows), though some species occur on Vitaceae, Apiaceae, and Asteraceae. The genus exhibits host-specificity, with species-level identification often requiring knowledge of the host plant due to subtle morphological differences. Multiple independent origins of ant mutualism have been documented within the genus.
Maevia intermedia
Maevia intermedia is a jumping spider (family Salticidae) native to North America, described by Robert D. Barnes in 1955 to distinguish it from similar congeneric species. It is morphologically intermediate between Maevia inclemens and Maevia expansa, with males resembling the light morph of M. inclemens. The species is medium-sized, with females slightly larger than males, and possesses the characteristic Salticid visual system with forward-facing principal eyes.
Melanoliarus forcipatus
Melanoliarus forcipatus is a species of planthopper in the family Cixiidae, first described by Caldwell in 1947. Species in this genus are small to medium-sized fulgoroid insects characterized by their brachypterous (short-winged) condition in females and macropterous (long-winged) condition in males. Cixiidae planthoppers are generally associated with woody or herbaceous host plants, with nymphs often feeding on roots. The specific epithet "forcipatus" refers to a forceps-like structure, likely describing a morphological feature of the male genitalia or other appendage.