Xanthopygus, Kraatz, 1857

Chatzimanolis, Stylianos, 2022, A revision of the genus Xanthopygus Kraatz (Staphylinidae: Xanthopygina), Zootaxa 5099 (2), pp. 151-178 : 176

publication ID

https://doi.org/ 10.11646/zootaxa.5099.2.1

publication LSID

lsid:zoobank.org:pub:9889BA66-0E9D-424B-BD4D-DE835993CD0F

DOI

https://doi.org/10.5281/zenodo.6309143

persistent identifier

https://treatment.plazi.org/id/6408AC19-4D2C-F86A-FF2C-5E88CF8F5CE6

treatment provided by

Plazi

scientific name

Xanthopygus
status

 

Key to the species of Xanthopygus View in CoL

1. Antennomere 4 without tomentose pubescence ( Figs. 18 View FIGURES 15–18 , 39 View FIGURES 37–39 ); mandibles more or less straight except tip ( Figs. 15 View FIGURES 15–18 , 37 View FIGURES 37–39 ); eyes as long as 1/4 length of head ( Figs. 15 View FIGURES 15–18 , 37 View FIGURES 37–39 ); head appearing flat ( Figs. 15 View FIGURES 15–18 , 37 View FIGURES 37–39 ); sternite 6 with two anterior transverse lines ( Fig. 17 View FIGURES 15–18 )................................................................................................ 2

- Antennomere 4 with tomentose pubescence (Figs. 10, 26, 33, 43, 50); mandibles curved from apical half ( Figs. 1 – 2 View FIGURES 1–6 , 7, 40, 47); eyes as long as 1/3-2/5 length of head (Figs. 7, 23, 30, 40, 47); head appearing convex (Figs. 7, 23, 30, 40, 47); sternite 6 with single anterior transverse line (Fig. 9)..................................................................... 3

2. Antennomere 3 clearly longer than 2 ( Fig. 18 View FIGURES 15–18 ); pronotum microsculpture polygon shaped; tergite 6 sparsely punctate; tip of paramere emarginate ( Figs. 19, 21 View FIGURES 19–21 ).............................................................. X. luctuosus View in CoL

- Antennomere 3 subequal to 2 ( Fig. 39 View FIGURES 37–39 ); pronotum microsculpture with transverse lines; tergite 6 densely punctate; no male specimens known............................................................................ X. oliveirae View in CoL

3. Antennomere 4 longer than wide ( Fig 50 View FIGURES 47–50 ); pronotum densely punctate, typically with three rows of punctures on each half beside median line ( Fig. 48 View FIGURES 47–50 ); sternite 7 in males with porose structure ( Fig. 49 View FIGURES 47–50 )........................ X. xanthopygus View in CoL

- Antennomere 4 subquadrate (Figs. 10, 26, 33, 43); pronotum not densely punctate, typically with two or less rows of punctures on each half beside median line (Figs. 8, 24, 31, 41); sternite 7 in males without porose structure (Figs. 9, 25, 32, 42)..... 4

4. Head and pronotum with medium to large size punctures (Figs. 7–8, 40–41); pronotum with 1–2 dense rows of punctures on each half beside median line (Figs. 8, 41); abdominal segments 4–6 with iridescent overtones under strong light (Figs. 7, 40). ................................................................................................... 5

- Head and pronotum with small to medium size punctures ( Figs. 23–24 View FIGURES 23–26 , 30–31 View FIGURES 30–33 ); pronotum with one sparse row of punctures on each half beside median line ( Figs. 24 View FIGURES 23–26 , 31 View FIGURES 30–33 ); abdominal segments 4–6 not iridescent under strong light ( Figs. 23 View FIGURES 23–26 , 30........ 6 View FIGURES 30–33

5. Abdominal segment 7 completely orange (Figs. 7, 9); abdominal segment 6 with a distinct bright band of orange coloration posteriorly (Figs. 7, 9); aedeagus with median lobe lacking subapical tooth ( Fig. 12 View FIGURES 11–13 ); paramere in lateral view much shorter than median lobe ( Figs. 11–12 View FIGURES 11–13 )..................................................................... X. cognatus View in CoL

- Abdominal segment 7 never completely orange, typically anterior half dark or light brown ( Figs. 40, 42 View FIGURES 40–43 ); abdominal segment 6 without a distinct bright band of orange coloration posteriorly ( Figs. 40, 42 View FIGURES 40–43 ); aedeagus with median lobe having a subapical tooth ( Fig. 45 View FIGURES 44–46 ); paramere in lateral view slightly shorter than median lobe ( Figs. 44–45 View FIGURES 44–46 )....................... X. pexus View in CoL

6. Paramere apically emarginate ( Figs. 34, 36 View FIGURES 34–36 ); known from Peru............................................ X. max View in CoL

- Paramere apically rounded ( Figs. 27, 29 View FIGURES 27–29 ); known from Colombia......................................... X. major View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

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