larvae are parasites that feed on hemolymph, while deutonymphs and adults are largely neutral predators of small invertebrates in bee nests

Name and classification

Neotrombidium Leonardi, 1902

Superorder Acariformes » Order Trombidiformes » Suborder Prostigmata » Infraorder Anystina » Hyporder Parasitengona » Family Neotrombidiidae » Genus Neotrombidium

Type species
Trombidium (Neotrombidium) furcigerum Leonardi, in Berlese and Leonardi, 1902


Larva: Palpal genu with one seta (Fig. 1). One pair of dorsal trichobothria on prodorsal sclerite (Fig. 1). Scutellum bearing setae c1 absent (Fig. 1). Claparède’s organs (urstigmata) present (Fig. 2). One claw at the apex of leg tarsi I-III (Fig. 2). Posteroapical corner of at least the posterior leg coxa ornamented with characteristic areas of porosity in adults and larvae (Fig. 2). The number of barbed setae on the femora of the anterior, mid, and posterior legs is 7-6-6, a combination unique to this genus. Femur I with at least one solenidion, femora II-III with at least two solenidia. Lateral walls of base of gnathosoma (gnathobase) densely punctate (Fig. 2).


This genus is worldwide in distribution except for the polar regions. A single species associated with bees has been found in the USA (Florida).

Bee hosts

large carpenter bee Xylocopa micans

Host association level


associated exclusively with bees or their close relative, wasps; cannot live without these hosts


some life stages are associated with bees, while others are not

Facultative or opportunistic

can complete entire life cycle without bees or their close relative, wasps


Host associations, feeding, and dispersal

  • Adults and nymphs are predatory on small invertebrates in subcortical habitats and forest litter. They may accidentally occur in bee nests.
  • Larvae are typically parasitic on adult subcortical beetles, though one species has been found on a large carpenter bee (Xylocopa). The level of association of these mites with the hosts is unknown, but there is probably no strict host specificity, either to beetles or to bees.