Cissidium

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 137-138

publication ID

https://doi.org/ 10.5852/ejt.2020.622

publication LSID

lsid:zoobank.org:pub:9CD3B2CD-F072-4994-8CA9-24145D343401

DOI

https://doi.org/10.5281/zenodo.3795704

persistent identifier

https://treatment.plazi.org/id/039987A1-389A-FF47-29F4-FEAEFAEBFC17

treatment provided by

Valdenar (2020-04-30 03:24:39, last updated 2024-11-25 23:17:01)

scientific name

Cissidium
status

 

Key to species View in CoL group 4B

1. Mesoventral lateral margins serrate................................................................................................... 2 – Mesoventral lateral margins without serrations................................................................................. 6

2. Pronotum lateral margins angulate .................................................................................................... 3 – Pronotum lateral margins rounded..................................................................................................... 4

3. Pronotum lateral margins less strongly angled, almost parallel-sided before hind angles, wider than the elytral base ......................................................................................... C. cryptophagoides View in CoL sp. nov. – Pronotal base narrower with two linear depressions, sides strongly angled ....................................... .................................................................................................................... C. shibatai Sawada, 2008

4. Elytra narrow, pronotum lateral margins almost parallel-sided base without linear depressions........ ........................................................................................................................ C. sakaii Sawada, 2008 – Elytra rounded ................................................................................................................................... 5

5. Mid-keel wider anteriorly ...................................................................... C. nishikawai Sawada, 2008 – Mid-keel wider posteriorly .................................................................... C. elongatum Sawada, 2008 View in CoL

6. Mesoventral lateral margins partly or completely effaced .............................................................. 15 – Mesoventral lateral margins distinct to mesocoxal borders............................................................... 7

7. Mesoventral collar without a median extension ................................................ C. obsoletum View in CoL sp. nov. – Mesoventral collar with a median extension ..................................................................................... 8

8. Mesoventrite lateral margins with a distinct concave bulge at the posterior angle ........................... 9 – Mesoventral lateral margins without a concave bulge..................................................................... 14

9. Mid-keel not fusing with the posterior border of the mesoventral collar the anterior angles not interrupting the line of the posterior margin................................................................................... 10 – Mid keel fusing with the posterior border of the mesoventral collar ...............................................11

10. Raised posterior margin before keel broad and strongly sculpted..................... C. ibicarense View in CoL sp. nov. – Raised posterior margin before keel narrower not sculpted ............................. C. peruviense View in CoL sp. nov.

11. Larger species ± 0.90 mm ......................................................................................... C. orami View in CoL sp. nov. – Smaller species ± 0.65–0.70 mm ..................................................................................................... 12

12 Mesoventral lateral margin hind angle sharp the concave extrusion very small................................. ................................................................................................................................. C. dybasi View in CoL sp. nov. – Mesoventral lateral margin hind angle more rounded..................................................................... 13

13. Mid-keel broad, short, mesoventral collar extension short .................... C. reitteri ( Matthews, 1889) View in CoL – Mid keel narrower, longer, mesoventral collar extension longer ....................... C. bomjesus View in CoL sp. nov.

14. Mid-keel very much reduced almost absent, keel strongly sculpted ................... C. losbanos View in CoL sp. nov. – Keel narrow before joining keel, less strongly sculpted................................ C. sawadai Darby, 2015 View in CoL

15. Keel very broad, flat, with rounded tip .............................................................. C. similatum View in CoL sp. nov. – Keel narrower .................................................................................................................................. 16 16. Mid-keel sides strongly widened anteriorly .................................................................................... 17 – Mid-keel sides not so widened anteriorly, sides concave ................................................................ 19

17. Posterior margins of humeri very long ............................................................................................ 18 – Posterior margins of humeri shorter, mid-keel with concave sides .................................................... ............................................................................................................... C. basale Motschulsky, 1855 View in CoL

18. Longer species, mid-keel wider........................................................................... C. lisae Darby, 2015 View in CoL – Shorter species, mid keel shorter, keel much narrower ................................... C. tigrum Darby, 2015 View in CoL

19. Mid-keel hind angles rounded ........................................................................... C. obscenum View in CoL sp. nov. – Mid-keel hind angles not rounded, extending towards mesocoxal posterior border....................... 20

20. Mesoventral collar without a medial extension .................................................. C. dividuum View in CoL sp. nov. – Mesoventral collar with a medial extension .................................................................................... 21

21. Mesoventral median extension long, with a splayed end, keel very long and narrow ........................................................................................................ C. subangulatum View in CoL sp. nov. – Shorter species, mid-keel shorter, keel shorter and wider at base ................... C. angulatum View in CoL sp. nov.

Darby M. 2015. Studies of Bolivian Ptiliidae (Coleoptera) 1: The genus Cissidium Motschulsky with six new species. Zootaxa 3937 (1): 179 - 190. https: // doi. org / 10.11646 / zootaxa. 3937.1.9

Matthews A. 1889. New genera and species of Trichopterygidae. Annals and Magazine of Natural History (6) III: 188 - 195. Available from https: // biodiversitylibrary. org / page / 15621981 [accessed 4 Feb. 2020].

Motschulsky V. von. 1855. Voyages. Lettre de M. de Motschulsky a M. Menetries. No 2, au bord du bateau a vapeur United-States, 20 Mars 1854. Etudes entomologiques 4: 8 - 25.

Sawada Y. 2008. A Revision of the Genus Cissidium (Coleoptera: Ptiliidae) in Japan. Special Publication 2: 101 - 126. Japan Coelopterological Society, Osaka.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Ptiliidae

SubFamily

Ptiliinae

Tribe

Discheramocephalini

Genus

Cissidium