Micridium

Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, Zootaxa 4242 (2), pp. 233-254 : 236

publication ID

https://doi.org/ 10.11646/zootaxa.4242.2.2

publication LSID

lsid:zoobank.org:pub:0DD1868D-4EF5-4FB7-AEE9-372644800A79

DOI

https://doi.org/10.5281/zenodo.6045175

persistent identifier

https://treatment.plazi.org/id/03E64B08-E32B-FFF7-8585-5869FA27EC54

treatment provided by

Plazi

scientific name

Micridium
status

 

Key to the species of Micridium View in CoL (excluding M. angulicolle , M. lineatum , M. rhodeanum and M. vittatum )

1. Pronotum with two distinct linear depressions............................................................... 2

- Pronotum without linear depressions but sometimes with puncture depressions of variable size arranged in groups......... 7

2. Pronotal linear depressions +/– parallel ( Figs. 17, 28 View FIGURES 17 – 32 ).........................................................3

- pronotal linear depressions clearly narrowing anteriorly ( Figs. 19, 23, 27, 30 View FIGURES 17 – 32 )......................................4

3. Male intercoxal process of metaventrum with four medial setae (Fig.97)............................. quadridens View in CoL sp. n.

- Male intercoxal process of metaventrum without projecting setae (Fig. 95)......................... attenboroughi View in CoL sp. n. (These two species are very similar and difficult to separate on other criteria)

4. Pronotal linear depressions sinuous and reaching past the midpoint..................................... oweni View in CoL sp. n.

- Pronotal linear depressions shorter, barely reaching the midpoint................................................5

5. Dark species with long antennae ( Fig. 44 View FIGURES 42 – 46 ) (mesocoxae widely separated ( Fig. 57 View FIGURES 47 – 60 )......................... elegans View in CoL sp. n.

- Paler yellowish brown species, antennae shorter.............................................................6

6. Mentum sides +/– parallel (as Fig. 41 View FIGURES 33 – 41 )...................................................... halidaii (Matthews.) View in CoL

- Mentum sides narrowed towards base ( Fig. 35 View FIGURES 33 – 41 ).................................................. boliviense View in CoL sp. n.

7. Mesocoxae almost contiguous, separated by a narrow keel.....................................................8

- Mesocoxae not contiguous, more widely separated..........................................................11

8. Mentum sides =/– parallel (as Fig. 41 View FIGURES 33 – 41 ).....................................................................9

- Mentum sides narrowed towards base (as Fig. 35 View FIGURES 33 – 41 )...........................................................10

9. Large species ( Fig. 12 View FIGURES 1 – 14 )...................................................................... newtoni View in CoL sp. n.

- Smaller species (Fig. 15).................................................................... proprium View in CoL sp. n.

10. Pronotum with well marked circular pits ( Fig. 21 View FIGURES 17 – 32 )................................................. foveatum View in CoL sp. n.

- Pronotum with well marked reticulation but without circular pits ( Fig. 24 View FIGURES 17 – 32 ).............................. thayerae View in CoL sp. n.

11. Mesocoxal separation narrower ( Fig. 58 View FIGURES 47 – 60 )........................................................ hilli (Johnson) View in CoL

- Mesocoxal separation wider ( Figs. 47, 53 View FIGURES 47 – 60 ).................................................................12

12. Metepiventral suture short (as Fig. 62 View FIGURES 61 – 71 )........................................................ inornatum View in CoL sp. n.

- Metepiventral suture long ( Fig. 61 View FIGURES 61 – 71 )............................................................. johnsoni View in CoL sp. n.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Ptiliidae

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