Leiodinae Fleming 1821
Creators: name: Newton, Alfred F.
name: Švec, Zdeněk
name: Fikáček, Martin
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae

description: Key for the identification of described Leiodinae species known from Chile and Argentina *
1 Tarsal formula 5-5- 5 in both sexes. .......................................................................... 2
– Tarsal formula different, 5-5-4 or 5-4- 4 in both sexes. ........................................... 10
2(1) Tarsomere I as long as or longer than II. Sogdini. .................................................... 3
– Tarsomere I much shorter than II. Mesocoxae very widely separated by about their length. Metatrochanter and metafemur with long, obtrusive curved tooth. Eyes protruding laterally. Aedeagus egg-shaped, apex of median lobe broadly rounded (PECK & COOK 2003: Fig. 12). Length: 4.2 mm. Argentina and Bolivia. ............................... ................................................. Estadiini: Dietta argentinensis Peck & Cook, 2003
3(2) Mesoventrite with high acute longitudinal carina (angulate in lateral view); mesoventrite deepened between procoxal rest area and longitudinal carina. ......................... 4
– Mesoventrite without high angulate longitudinal carina, at most with low short unobtrusive carina. ............................................................................................................ 8
4(3) Elytra not transversely strigose (e.g. Figs 6A–B). .................................................... 5
– Elytra transversely strigose (e.g., Figs 5E–F). .......................................................... 7
*Additional undescribed species, belonging to some of these genera as well as to some other genera not yet reported from Chile and Argentina, are present in both countries, so this key must be regarded as preliminary.
5(4) Body bicoloured or with light spots on pronotum and transverse strip on elytra. Parameres approximately as long as median lobe. .......................................................... 6
– Body unicoloured, reddish brown. Parameres distinctly shorter than median lobe (as in HLISNIKOVSKÝ 1964: Fig. 7). Length: 1.9–2.5 mm. Argentina and Chile. ................ ................................................ Metahydnobius basipunctatus (Hlisnikovský, 1964)
6(5) Head and pronotum unicolorous black or brown. Elytra unicolorous yellowish. Median lobe terminating in strigose oval plate (JEANNEL 1962: Fig. 34). Length: 5.5 mm. Chile. ........................................................... Metahydnobius bicolor (Jeannel, 1962)
– Pronotum with light rounded antero-lateral spots. Elytra with transverse bow-shaped dark strip. Median lobe terminating in simply shortly rounded tip (JEANNEL 1962: Fig. 31). Length: 2.0– 2.6 mm. Chile. ........ Metahydnobius bimaculatus (Jeannel, 1962)
7(4) Antennal club black. Maximum width of pronotum in middle. Parameres distinctly shorter than median lobe (HLISNIKOVSKÝ 1962: Fig. 2). Length: 2.2 mm. Argentina. ................................................ Metahydnobius hybridiformis (Hlisnikovský, 1964)
– Antennae unicolorous, reddish (Figs 5E – F). Maximum width of pronotum at base (Fig. 5E). Parameres approximately as long as median lobe (Fig. 5G). Length: 1.8– 2.2 mm. Chile and Argentina. ........... Metahydnobius forticornis (Champion, 1918)
8(3) Mesoventrite vertical with short very low unobtrusive longitudinal carina (Figs 3C– D), metaventrite without foveae just behind mesocoxae (Figs 3A,C). Body highly convex and ovoid (Figs 1A–B). Elytra transversely strigose. Median lobe symmetrical, parameres slim (Fig. 1D). Length: 3.3–3.6 mm. Chile. ........................................ ....................................................................... Anaballetus chilensis gen. & sp. nov.
– Mesoventrite more or less horizontal with shallow distinctly delimited impression, metaventrite with several foveae just behind mesocoxae. Body dorso-ventrally compressed, elongate and almost parallel-sided (Figs 6A–B). ....................................... 9
9(8) Elytra without transverse strigae (Figs 6A–B). Median lobe asymmetrical, parameres conspicuously widened (Fig. 6C). Length: 2.2–3.2 mm. Chile and Argentina. .......... ...................................................................... Hydnodiaetus brunneus Jeannel, 1962
– Elytra with transverse strigae (similar to Figs 5E–F). 2 mm. Chile and Argentina. ........................................ Hydnodiaetus consobrinus (Fairmaire & Germain, 1859)
10(1) Labrum simple, not emarginate. Elytral rows of punctures (if developed) straight. Tibiae with sporadic fine spines.Tarsal formula 5-4-4. Pseudoliodini. ................. 11
– Labrum bilobed, distinctly emarginate. Elytral rows of punctures distinct, strongly curved. Tibiae with numerous strong spines. Tarsal formula 5-5-4. Leiodini ........13
11(10) Elytra with distinct punctured rows. Aedeagus with broader median lobe which does not extend to apices of parameres. .......................................................................... 12
– Elytra irregularly punctured (Figs 5A–B). Aedeagus as in Fig. 5C, apex of median lobe narrowed but truncate at apex which extends beyond apices of parameres. Spermatheca as in Fig. 5D. Chile. .............................. Neohydnobius irregularis sp. nov.
12(11) Body bicolored, pronotum yellow, head and elytra brown. Pronotum with indistinct microsculpture. Apex of median lobe convex, broadly rounded (JEANNEL 1962: Fig. 40). Length: 1.6 mm. Chile. ............................. Neohydnobius brevis Jeannel, 1962
– Body unicolorous brown. Pronotum transversely microsculptured. Apex of median lobe broadly truncate. Length: 2.3 mm. Argentina and Chile. .................................... .................................................... Neohydnobius argentinicus (Hlisnikovský, 1964)
13(10) Vertex with two large punctures. ............................................................................ 14
– Vertex with four large punctures. ............................................................................ 15
14(13) Metaventrite finely and sparsely punctured laterally. Parameres a little shorter than median lobe (DAFFNER 1985: Fig. 11). 1.9–2.6 mm. Chile. ......................................... .............................................................................. Ovocyrtusa bicolor Daffner, 1985
– Metaventrite densely and very coarsely punctured laterally. Parameres reach approximately to mid-length of median lobe (DAFFNER 1985: Fig. 15). Length: 1.6–2.0 mm. Chile. .............................................................. Ovocyrtusa bipunctata Daffner, 1985
15(13) Metaventrite coarsely and sparsely punctured laterally. Parameres distinctly longer than mid-length of median lobe...............................................................................16
– Metaventrite finely and sparsely punctured laterally. Parameres very short, not reaching mid-length of median lobe (DAFFNER 1985: Fig. 17). Length: 1.7–2.3 mm. Chile. ......................................................................... Ovocyrtusa thayeri Daffner, 1985
16(15) Antennal club black or darkened. Body brown-black. Parameres reaching behind distal quarter of median lobe (DAFFNER 1985: Fig. 9). Length: 2.0– 2.8 mm. Chile. ........ ......................................................................... Ovocyrtusa atricornis Daffner, 1985
– Antennal club yellow-red. Body red-brown. Parameres shorter reaching approximately distal third of median lobe (DAFFNER 1985: Fig. 13). Length: 1.8–2.6 mm. Chile. ............................................................................. Ovocyrtusa newtoni Daffner, 1985
description: Published as part of Newton, Alfred F., Švec, Zdeněk & Fikáček, Martin, 2017, A new genus and two new species of Leiodinae from Chile, with keys to world genera of Sogdini and Leiodinae from Chile and Argentina (Coleoptera: Leiodidae), pp. 121-140 in Acta Entomologica Musei Nationalis Pragae 57 (1) on pages 136-139, DOI: 10.1515/aemnp-2017-0061, http://zenodo.org/record/5315881