Morphological Ontogeny and Life Cycle of Laboratory-Maintained Eremobelba eharai (Acari: Oribatida: Eremobelbidae)

TL;DR

Researchers successfully reared Eremobelba eharai mites in the lab and documented their development and life cycle for the first time.

Contribution

First successful multigenerational lab rearing and detailed morphological ontogeny documentation of Eremobelba eharai.

Findings

Eremobelba eharai can complete its egg-to-egg life cycle in laboratory conditions.

The species exhibits characteristic leg-shaking movements and gregarious oviposition on dry yeast particles.

Scanning electron microscopy revealed a granular cerotegument covering the mite's surface.

Abstract

The oribatid mite, Eremobelba eharai, is distributed in northern China. Previously, information on its laboratory rearing and reproductive biology was lacking. Based on the first successful multigenerational laboratory rearing of this species, we thoroughly documented the morphological changes across all developmental stages, from larva to adult, and characterized its complete life cycle.

This study presents the first successful laboratory rearing of Eremobelba eharai, with the establishment of a sustainable multigenerational breeding system. We document for the first time its complete morphological ontogeny across all developmental stages (from larva to adult) and characterize its life cycle. We supplement the original adult description with detailed morphological characterization and illustrations of the gnathosomatic structures, including the subcapitulum, palps, and chelicerae. Scanning electron microscopy showed that its surface is covered with a granular cerotegument. Under isolated rearing conditions, this species can complete the entire egg-to-egg developmental cycle. In addition, preliminary behavioral observations during rearing revealed preferences for dark environments, characteristic leg-shaking movements, and gregarious oviposition on active dry yeast particles, with no evidence of cannibalism.

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