ABSTRACT Bees of the family Halictidae (Apoidea: Anthophila) have three pairs of thick, bundled muscles that are circular to subcircular in cross section within the first metasomal segment, as revealed by micro-CT scanning of 16 species in 15 genera of five bee families. In nonhalictids and the basal halictid subfamily Rophitinae, these muscles are planar (flat and sheetlike), typically lying between the anterior air sacs and abdominal wall. In Nomiinae and Halictinae, these muscles, especially the dorsal-ventral pair, bulge into air-sac space, partly enveloped by air-sac membrane. A possible function may be to facilitate metasomal compression and contraction, and thus air flow. The bundled shape of these derived halictid muscles is similar to that of flight muscles, but further data is needed to determine if they are fibrillar, which would suggest a completely different function.

中文翻译：

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Micro-CT 扫描揭示了汗蜂（膜翅目：Apoidea：Halictidae）中独特的后体肌肉组织

摘要 蜂科（Apoidea：Anthophila）的蜜蜂在第一后代体节段内具有三对厚的、成束的肌肉，这些肌肉的横截面呈圆形至亚圆形，通过对五个蜜蜂科 15 个属的 16 个物种进行显微 CT 扫描显示. 在 nonhalictids 和 basal halictid 亚科 Rophitinae 中，这些肌肉是平面的（扁平和片状），通常位于前气囊和腹壁之间。在 Nomiinae 和 Halictinae 中，这些肌肉，尤其是背腹对，鼓起进入气囊空间，部分被气囊膜包裹。一个可能的功能可能是促进后体压缩和收缩，从而促进空气流动。这些衍生的halictid肌肉的束状形状类似于飞行肌肉的形状，但需要进一步的数据来确定它们是否是纤维状的，