lives in bee nests and disperses on bees, but feeding behavior is uknown

Name and classification

Cerophagopsis Zachvatkin, 1941

Superorder Acariformes » Order Sarcoptiformes » Suborder Oribatida » Infraorder Desmonomata » Hyporder Astigmata » Family Acaridae » Genus Cerophagopsis

Type species
Cerophagopsis skorikovi Zachvatkin, 1941

Common synonyms
Rhypoglyphus. One historical paper considers Cerophagopsis as part of Cerophagus (not accepted here).


Phoretic deutonymph: Anterior extension of coxal apodeme III long, almost reaching lateral sides of body in the type species (C. skorikovi) (Fig. 4) but not in other described species. Coxal setae 1a filiform, not conoidal (Fig. 4). Coxal setae 3a, 4a alveolar (not conoidal) (Fig. 4). Empodial claws I-IV somewhat large, subequal, not twisted, each with a basal flange (Figs. 4, 7; in images empodial claws referred to as claws for simplicity). One long seta on tarsus IV (Fig. 9). Tarsal setae aa I (Figs. 5, 6) and ba I-II present (Fig. 5).

Adult: Setae ve short, not barbed, situated on the same transverse line as vi on prodorsal sclerite (Fig. 15). Supracoxal seta scx I thin, smooth, bent in basal portion (Fig. 15). Grandjean's organ rounded and fimbriate. Solenidia σ" and σ' on genu I subequal (Fig. 15). External scapular setae se positioned distinctly anterior to level of internal scapular setae (si) (Fig. 15).

Similar genera

Similar to Megachilopus but differs in having claws with basal flanges (Fig. 7) (no flanges in Megachilopus, Fig. 8) and in the absence of ventral ambulacral extension on tarsus I (Fig. 7) (with extension in Megachilopus, Fig. 8). Similar to Cerophagus but differs by the presence of tarsal setae aa I (Figs. 5, 6) in all stages (absent in Cerophagus). See also Sennertionyx.


Known from Eastern Palaearctic, Oriental, Afrotropical, and Australian region. Undescribed species have been found in the Nearctic and Neotropical regions (our data).

Bee hosts

Most species occur on leafcutting and resin bees (Megachile), especially subgenus Callomegachile and relatives that line cells of their nests with plant resin. One species has been described from the megachilid Heriades erythrosoma endemic to Madagascar, and another from Tetragonula carbonaria (Australia). Occasional records include the sand wasp Bembix borrei (family Sphecidae) and sugary stored products.

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

  • All stages live in nests of mostly megachilid and stingless bees. Food preferences and biology in nest are unknown.
  • Phoretic deutonymphs disperse on bee hosts (Fig. 16).