Eight New Species of Dicranocentrus and Redescriptions for D. thaicus and D. pilosus (Collembola: Entomobryidae: Orchesellinae)

Abstract

Eight new species of Dicranocentrus are described: capitaneus (Peru), reunionensis (Reunion Island), indecisus (Nepal); gapudi, luzonensis, and litoreus (Philippine Islands); halophilus and gemellus (Papua New Guinea). Dicranocentrus thaicus Yosii and D. pilosus Mari Mutt are redescribed. Dicranocentrus litoreus and D. halophilus were collected on seashores and present several modifications apparently evolved as adaptations to this habitat: thick short claws, elongated mandibles, enlarged labral setae, and loss of the mucronal spine. These two species also have a reduced head and body chaetotaxy, very similar to that of the species of Heteromurus s, str. Eightynine figures complement the descriptions.