Ptiliidae, Erichson, 1845

Darby, Michael, 2019, New Ptiliidae (Coleoptera) from Sarawak in the spirit collection of the Natural History Museum, London, European Journal of Taxonomy 512, pp. 1-50 : 3-4

publication ID	https://doi.org/ 10.5852/ejt.2019.512
publication LSID	urn:lsid:zoobank.org:pub:8DF89CFD-A549-4C69-8FBC-90EC8DEA9A66
DOI	https://doi.org/10.5281/zenodo.5941245
persistent identifier	https://treatment.plazi.org/id/BE2487B5-FF91-FFD7-6FB1-7E534846FD26
treatment provided by	Plazi
scientific name	Ptiliidae
status

Treatment

Subfamily, tribal and generic keys to the Ptiliidae View in CoL of Sarawak

Subfamilies

1. Metascutellum without lateral spurs ..................................................................................... Ptiliinae View in CoL – Metascutellum with lateral spurs ................................................................................. Acrotrichinae

Tribes and genera of Ptiliinae View in CoL

1. Wing membrane without a clear medial constriction, metacoxae separated by a bifurcate extension of the metaventrum ................................................................ Ptenidiini View in CoL ( Sindosium Johnson, 2007 View in CoL )

– Wings with a clear median constriction and long peripheral setae ................................................... 2

2. Small, flattened, yellow species with truncated elytra and widely separated metacoxae (usually found in corticular habitats) ................................................................................................................ ............................ Ptinellini View in CoL ( Niptella View in CoL gen. nov. ( Fig. 12A View Fig ), Ptinella Motschulsky, 1844 View in CoL ( Fig. 13A View Fig ))

– More rounded species without truncated elytra ................................................................................ 3

3. Mesoventrum with a large spatulate plate, metacoxae separated by a bifurcate extension of the metaventrum ( Fig. 11D View Fig ) .................................................. Nanosellini View in CoL ( Kuschelidium Johnson, 1982 View in CoL )

– Without a mesoventral spatulate plate .............................................................................................. 4

4. Species with long legs and antennae clearly adapted for an active lifestyle .................................... 5 – Species with shorter antennae and legs ............................................................................................ 6

5. Antennomere XI with a medial constriction giving the appearance of a dumb-bell or hour-glass, mesoventrum without obvious perforations ....................................................................................... ...................................................................... Discheramocephalini View in CoL ( Cissidium Motschulsky, 1855 View in CoL )

– Antennomere XI without a medial constriction, pronotum with strongly sculpted linear foveae ( Fig. 10B View Fig ), mesoventrum clearly perforated ....................................................................................... ............................................................ Discheramocepahlini ( Discheramocephalus Johnson, 2007 View in CoL )

6. Small, yellow, fragile species, length <0.7 mm ............................................................................... 7 – Larger, more robust species, length> 0.7 mm .................................................................................. 8

7. Metacoxae contiguous ( Fig. 3 View Fig A–C) ................................................. Ptiliini View in CoL ( Bambara Vuillet, 1911 View in CoL )

– Metacoxae separated by ± ¹∕₅ the width of the metaventrum ( Fig. 5F View Fig ) ............................................... ....................................................................................................... Ptiliini View in CoL ( Ptiliola Haldeman, 1848 View in CoL )

8. Mesoventral collar sharply pointed between the mesocoxae which are contiguous ........................... ................................................................................................................. Ptiliini View in CoL ( Erro Darby, 2017 View in CoL )

– Mesoventral collar square ended between the mesocoxae which are more widely separated ............ ..................................................................................................... Ptiliini View in CoL ( Dipentium Johnson, 1982 View in CoL )

Tribes and genera of Acrotrichinae

1. Hind margin of the pronotum strongly sinuate before the hind angles which project backwards. Mesosternal collar curved posteriorly at humeri ................................................................................ ....................................... Acrotrichini View in CoL ( Acrotrichis Motschulsky, 1848 View in CoL ; Storicricha Johnson, 1988 View in CoL )

– Hind margin of pronotum much less markedly sinuate and the hind angles obtuse/right angled, mesosternal collar almost straight ...................................... Nephanini View in CoL ( Baeocrara Thomson, 1859 )