Eutheia siamensis Franz

Jałoszyński, Paweł, 2015, Notes on the systematic placement of Eutheia siamensis Franz (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4021 (3), pp. 493-498 : 495

Paratype of Eutheia siamensis Franz

The paratype specimen was mounted in such a position that it resembled the holotype, especially that the body length and the antennae are similar to those of the holotype. After relaxing, cleaning and remounting ( Fig. 7 ), however, it became clear that this is not a Cephennomicrus , but a member of Eutheiini . Because of the very small body it was difficult to identify the genus, but the low-pressure-SEM examination of an uncoated specimen revealed characters typical of Paraneseuthia ( Figs 8–9 ): three-segmented maxillary palps; long prementum; head capsule lacking occipital constriction; inner part of prothoracic hypomera very narrow; prosternal process feebly developed, narrow and not separating procoxae; fully demarcated mesanepisterna and mesepimera; moderately broad and flat mesoventral intercoxal process narrowing anteriorly and in its anterior part strongly elevated; and area separating metacoxae much broader than intermesocoxal region. The strongly elongate and flattened body form of this specimen is a feature rarely found among Paraneseuthia , but this genus is most morphologically diverse among Eutheiini , and similarly small and slender species are known from Australia ( Jałoszyński 2011c, 2013); also an undescribed species from the Japanese subtropical Sakishima Archipelago (mentioned by Jałoszyński 2011c) shows similar features.

Figures

FIGURES 7 – 9. Paraneseuthia sp., paratype of Eutheia siamensis Franz. Dry-mounted specimen (7); SEM micrographs of head and prothorax (8) and pterothorax (9) in ventral view.