Sindosium Johnson 2007
Creators: name: Maté Nankervis, Jason F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Sindosium

description: Revised key to the known species of Sindosium
The following key has been generated from the original descriptions in Johnson (2007) and Darby (2019a, 2019b) as well as from the available material pertaining to the new species described herein.
1 Mesoventral collar with a pair of deep pubescent foveae posteriorly............................................. 2
- Mesoventral collar without deep foveae or at most just impressed............................................... 5
2 Pronotum evenly convex, without any impressions or foveae on the disc, clearly punctate throughout, though puncturation may be sparse on disc or absent in a medial strip................................................................ 3
- Pronotum impunctate, with a conspicuous medial fovea. Larger species, body length: 0.86–1.12mm ...................................................................................................... foveatum Johnson, 2007
3 Foveolate pronotum with shorter pubescence. Mesocoxae more widely separated, equal to the width of the mesotibia. Smaller species, body length: 0.94mm ............................................................ collinsi Darby, 2019
- Pronotum not foveolate, pubescence long and dense throughout. Mesocoxae close, separation decidedly less than the width of the mesotibia. Larger species............................................................................ 4
4 Head narrower; pronotum with hind corners curved outwards, obviously projected; metaepisternum posteriorly divergent (Fig. 1B); metacoxal bifid projection narrower, sinuate (Fig. 2B); row of setae on 5th ventrite much denser than rest. Aedaegus (Fig. 2E) & spermatheca (Fig. 2D). Length 0.98-1.12mm ......................................... queenslandicum n. sp.
- Head wider; pronotum with hind corners straight or bent inwards, never projected; metaepisternum posteriorly narrower, partly subparallel (Fig. 3B); metacoxal bifid projection wider, falcate (Fig. 4B); abdominal segments with setation similar on all rows. Aedaegus (Fig. 4E) and spermatheca (Fig. 4D). Length 1.04-1.27mm ................................ lamingtoni n. sp.
5 Pronotum sparsely and regularly punctured, laterally evenly explanate. Elytra opaque, with iridiscent sheen. Smaller species, 0.82mm ......................................................................... opacipenne Johnson, 2007
- Pronotum sparsely punctured except for median bare strip, with its sides strongly and unevenly explanate, with posterior lateral areas much widened, its boders serrate. Elytra neither opaque nor iridescent. Larger species, 1.07mm ....................................................................................................... bacchusi Darby, 2019
description: Published as part of Maté Nankervis, Jason F., 2020, Description of two new species of Sindosium Johnson, 2007 from Australia (Coleoptera, Ptiliidae), pp. 528-540 in Zootaxa 4895 (4) on pages 538-539, DOI: 10.11646/zootaxa.4895.4.4, http://zenodo.org/record/4358854