Notes on the systematic placement of Eutheia siamensis Franz (Coleoptera, Staphylinidae, Scydmaeninae)
Author
Jałoszyński, Paweł
text
Zootaxa
2015
4021
3
493
498
journal article
10.11646/zootaxa.4021.3.10
03eedc14-3d28-477d-a85e-7ce70cff17ed
1175-5326
236339
5A548CC1-FDDC-487A-8615-AB26129A556C
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.