Lagideus Konow
Creators: name: Smith, David R.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Pergidae
Lagideus

description: Lagideus Konow
Lagideus Konow, 1905: 160. Type species: Lagideus crinitus Konow, 1905 by monotypy.
Remarks. The genus was characterized by Smith (1990). Characters useful for species separation are color, the antennae, length of the malar space, length of the inner hind tibial spur, female ovipositor, and male genitalia.
The female antenna may be slightly serrate (Fig. 11) or filiform (Fig. 1). The male antennae have long rami, with antennomeres 3–8 or 4–8 bipectinate. For males, there are three basic patterns: (1) (Fig. 26) antennomere 3 unipectinate, antennomeres 4–6 bipectinate with inner ramus much shorter than outer ramus, and antennomeres 7 and 8 bipectinate with both rami subequal in length; (2) (Fig. 25) antennomeres 3–8 with long rami, antennomere 3 with inner ramus very short, antennomeres 4–8 with inner and outer rami long and subequal in length; and (3) (Fig. 24) similar to (2) but inner ramus of antennomere 3 long. Most males described in my 1990 revision were type (1); only one species, L. longicus, was type (2), and none that I saw at that time were type (3).
The malar space may be almost nonexistent to as broad as the diameter of the front ocellus. Only a few species, including L. romius Smith, L. albitarsis and L. magdalena in this paper, have a linear, almost non-existent, malar space.
The inner hind tibial spur is exceptionally long in all Lagideus species. The length in few species, such as L. romius, exceeds the length of the hind basitarsomere. The length in most species is about two-thirds the length of the hind basitarsomere.
The female ovipositor is unique for most species, and it should be checked for species identification. The ovipositor should be pulled down (such as in Figs. 1, 7) and compared with the figures for positive identification.
The male genitalia are useful, but all are very similar (Figs. 27–34). The shape of the parameres and penis valve give the best characters.
Females of five of the species described here (L. albitarsis, L. tapanti, L. magdalena, L. schmidti, and L. longicus) go to couplets 13 and 14 of my 1990 key, and three of the males (L. boyaca, L. schmidti, and L. tapanti) to couplet 17 of my key. The key is revised as follows to include these species:
Couplets 2–16 of my 1990 key are to females, couplets 13 and 14 are revised as follows:
13. Annular hairs or spines on lancet nearly absent or of uniform width the length of the annuli (as in Figs. 20, 22)......... 13a - Annular spines on central segments of lancet dense and long on dorsal half and much shorter on ventral half (as in Figs. 17, 18,
21)............................................................................................... 14 13a. Annular hairs on lancet very short on annuli 1–6, nearly absent on remaining annuli (Fig. 20); malar space nearly linear. 13b - Annular hairs or spines on annuli long on annuli 3–12 or 4–19 (Fig. 22);. malar space broad, nearly equal to diameter of front
ocellus............................................................................................ 13c 13b. Apical 4 hind tarsomeres white.................................................................. L. albitarsis - Hind tarsus black.............................................................................. L. mulsus 13c. Lancet with about 16 serrulae, spines long and dense on annuli 3–12 (Fig. 22).............................. L. tapanti - Lancet with about 23 serrulae; spines long and dense on annuli 4–19 (Smith 1990: fig. 323)................... L. oranus 14. Malar space linear; lancet with spines on dorsal halves of annuli 6–11 much longer than segment width, overlapping preceding
segment (Smith 1990: fig. 318)................................................................... L. luticus - Malar space various; lancet with spines on dorsal halves of central annuli much shorter than segment widths (Figs. 17, 18, 21)
.................................................................................................. 14a 14a. Malar space linear; lancet with long spines on dorsal halves of annuli 6–11 (Fig. 17)...................... L. magdalena - Malar space nearly as broad as diameter of front ocellus; lancet with long spines on dorsal halves of annuli 4–13 or 5–10 (Figs.
18, 21)........................................................................................... 14b 14b. Lancet with long spines on dorsal halves of annuli 4–13 (Fig. 18)....................................... L. schmidti - Lancet with long spines on dorsal halves of annuli 5–10 (Fig. 21)....................................... L. longicus
Couplets 17–21 of my 1990 key are for males. Couplet 17 is revised as follows:
17. Antennomeres 3–7 bipectinate, both rami long (Figs. 24, 25)................................................. 17a - Antennomeres 3–7 unipectinate, inner ramus a short rounded lobe (Fig. 26)...................................... 18 17a. Inner ramus of antennomere 3 long, nearly half length of outer ramus (Fig. 24).................................. 17b - Inner ramus of antennomere 3 a short, rounded lobe (Fig. 25)................................................ 17c 17b. Head and thorax covered with golden-yellow hairs; pronotum and part of mesonotum orange; legs entirely orange; genitalia as
in Figs. 27, 31 ................................................................................. L. boyaca - Head and thorax covered with white hairs; thorax black; legs largely black or orange with coxae and base of hind femur black;
genitalia as in Figs. 28, 32 ..................................................................... L. schmidti 17c. Antenna black; genitalia as in Figs. 29, 33 ........................................................ L. longicus - Antenna with basal 2 or 3 antennomeres white; genitalia as in Figs. 30, 34 ................................. L. tapanti
description: Published as part of Smith, David R., 2012, The South American genus Lagideus Konow (Hymenoptera: Pergidae: Syzygoniinae), a Supplement, pp. 1-18 in Zootaxa 3413 on pages 2-3, DOI: 10.5281/zenodo.281904