Dacne rufifrons

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Taxonavigation

Ordo: Coleoptera
Familia: Erotylidae
Genus: Dacne

Name

Dacne rufifrons (Fabricius, 1775) – Wikispecies link – Pensoft Profile

Material examined

Bieszczady Mts.: Wetlina State Agricultural Farm (FV04), 27 VII 1994, 2 exx., leg. JK [LBJK].
A rare species, known from scattered localities in various regions of Poland. Updated key to Triplaxspecies of Central Europe Triplax carpathica was not included in any of the previously published identification keys to Central European Erotylidae (Vogt 1967, Mazur 1983). Therefore, an updated key is presented below, comprising all Central European Triplax species (Figs 3–24). Species known from adjacent areas and which may occur in Poland are denoted with an asterisk.

Updated key to Triplaxspecies of Central Europe — R. Ruta , P. Jałoszyński , P. Sienkiewicz , S. Konwerski

1		Basal margin of elytra crenulate (Fig. 25), often forming a distinct ridge    2
–		Basal margin of elytra smooth, without crenulation (Fig. 26)    9
2		Head black    3
–		Head yellowish-red    4
3		Body elongate oval, distinctly rounded; BL 3.3–4.0 mm    Triplax melanocephala (Latreille)*
–		Body broadly oval, sides distinctly rounded; BL 3.3–4.0 mm    Triplax collaris (Schaller)
4		Entire venter yellowish-red    5
–		Meso- and metaventrite black    6
5		Elytra metallic bluish or greenish; BL 3.6–4.4 mm; sides of body rounded    Triplax aenea (Schaller)
–		Elytra black, without metallic hue; BL 6.0–6.5 mm; sides of body subparallel    Triplax elongata Lacordaire
6		Abdominal sternites yellowish-red; BL 5.1–6.7 mm    Triplax russica (Linnaeus)
–		Abdominal sternites entirely or largely black    7
7		Body oval, sides rounded; BL 3.9–4.1 mm    Triplax rufipes (Fabricius)
–		Body elongated, sides subparallel    8
8		Antennomere III much longer than II; BL 3.0–4.2 mm    Triplax lacordairei Crotch*
–		Antennomere III slightly longer than II; BL 2.0–3.0 mm    Triplax pygmaea Kraatz*
9		Meso-, metaventrite and abdominal sternites black; body stout (BL/BW 1.7–1.8); BL 3.3–5.0 mm    Triplax lepida (Faldermann)
–		Entire venter yellowish-red, body larger and more oblong (BL/BW 1.9–2.0)    10
10		Scutellum yellowish-red, elytral punctures shallow; BL 4.2–4.9 (n=16, mean 4.6)    Triplax scutellaris Charpentier
–		Scutellum always black, eelytral punctures deep; BL 3.9–4.5 (n=9, mean 4.1)    Triplax carpathica Reitter

Taxon Treatment

• Ruta, R; Jałoszyński, P; Sienkiewicz, P; Konwerski, S; 2011: Erotylidae (Insecta, Coleoptera) of Poland – problematic taxa, updated keys and new records ZooKeys, 134: 1-13. doi

Images

Figures 3–13. Central European species of Triplax, dorsal habitus: Triplax aenea 3 Triplax carpathica 4 Triplax collaris 5 Triplax elongata 6 Triplax lacordairei 7 Triplax lepida 8 Triplax melanocephala 9 Triplax pygmaea 10 Triplax rufipes 11 Triplax russica 12 and Triplax scutellaris 13 Scale bar = 1.0 mm.  Figures 14–24. Central European species of Triplax, ventral habitus: Triplax aenea 14 Triplax carpathica 15 Triplax collaris 16 Triplax elongata 17 Triplax lacordairei 18 Triplax lepida 19 Triplax melanocephala 20 Triplax pygmaea 21 Triplax rufipes 22 Triplax russica 23 and Triplax scutellaris 24 Scale bar = 1.0 mm.  Figures 25–26. Triplax, basal part of elytra (SEM micrographs); Triplax russica 25 and Triplax scutellaris 26.