Cyrtolabulus van der Vecht
Creators: name: Selis, Marco
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eumenidae
Cyrtolabulus

description: Key to the Malagasy species of Cyrtolabulus van der Vecht
[characters of C. suboscurus were extracted from literature and images]
1. S2 longer than T2 when seen in profile (Fig. 13A); apical margin of T3 broadly rounded, medially expanded in a lamellar lobe (Fig. 13C)........................................................................................... 2
-. S2 as long as T1 when seen in profile (Fig. 13B); apical margin of T3 straight, not medially expanded.................. 4
2. Pronotal carina almost entirely absent, barely visible on humeri only (Fig. 4A). Tegula small and not expanded posteriorly, maximum width in anterior third; parategula broad and subtriangular (Fig. 4D). Propodeum entirely vertical, without a dorsal horizontal face behind metanotum (Fig. 13D). T 1 in lateral view evenly and strongly convex above, much higher in the middle than at base and apex; T2 with V-shaped depression on disc; apical lamella of T2 and T3 preceded by a strong preapical bulge (Fig. 13I)............................................................................ C. madli Gusenleitner
-. Pronotal carina more developed, at least on lateral thirds of pronotal margin (Fig. 7A). Tegula large and broadly expanded posteriorly, maximum width in posterior half; parategula narrow and digitiform (Fig. 7D). Propodeum bulging dorsally, with a short dorsal horizontal face behind metanotum (Fig. 13E). T 1 in lateral view abruptly expanded basally, then of regular height for most of its length; T2 not depressed on disc; only apical lamella of T2 preceded by a shallow preapical bulge (Fig. 13J).. ................................................................................................... 3
3. Sculpture of head and mesosoma sparser and shallower; clypeus almost impunctate, with very fine sparse punctures (Fig. 7C); tegula micropunctate with few barely visible punctures (Fig. 7D); dorsolateral faces of propodeum with interspaces mostly flattened and distinct. Occipital carina weak, barely visible on vertex. Transverse carina of metanotum blunt. Apical lamella of T3 preceded by a series of deep and well-marked punctures (Fig. 13C)....................... C. rhombicus Gusenleitner
-. Sculpture of head and mesosoma denser and coarser; clypeus coarsely and densely punctate; tegula with large deep punctures (Fig. 11); dorsolateral faces of propodeum with interspaces reduced to irregular ridges. Occipital carina strong, well developed on vertex. Transverse carina of metanotum sharp. Apical lamella of T3 preceded by a series of shallow and not marked punctures.................................................................... C. suboscurus (Giordani Soika)
4. Propodeum without a horizontal face behind metanotum (Fig. 13F).............................................. 5
-. Propodeum with a horizontal face behind metanotum distinctly separated from posterior vertical face (Figs. 13G–H)...... 6
5. Head and mesosoma more sparsely punctate, interspaces shiny and about as long as half puncture diameter (Figs. 3A–C); tegula micropunctate and shiny (Fig. 3D). Pronotum with a distinct separation between dorsal and anterior faces, pronotal carina developed on lateral thirds; anterior face of pronotum with sparse punctures medially. Metanotum without an anterior face, transverse carina slightly produced at extreme sides. Propodeum convex above apical deep concavity. T1 shorter and wider, 1.4× as long as apically wide; extreme base with a shallow transverse ridge; preapical furrow shallow (Figs. 3A–B)........................................................................................... C. flavorufus sp. nov.
-. Head and mesosoma more densely punctate, interspaces matte and mostly reduced to narrow ridges (Figs. 9A–D); tegula densely microreticulate and matte (Fig. 10A). Pronotum without a distinct separation between dorsal and anterior faces, pronotal carina developed on lateral fifths only; anterior face of pronotum with coarse and dense punctures medially. Metanotum with a distinct anterior face, transverse carina produced in two wide rounded lobes. Propodeum entirely oblique from base to apex, except very shallow apical concavity. T1 longer and narrower, 1.8× as long as apically wide; extreme base without transverse ridge; preapical furrow deep (Figs. 9A–B)................................................. C. sollicitus (Giordani Soika)
6. Basal margin of clypeus strongly raised in median third and margined laterally by sharp ridges (Fig. 8C). Horizontal face of propodeum posteriorly margined, angularly separated from posterior face (Fig. 13H); submarginal carina completely fused to strongly developed inferior carina, with a very short and barely visible projection above valvula (Fig. 8B). T1 with basal transverse carina angled in the middle; apical lamella of T2 not pigmented and not preceded by thickening of tergite (Figs. 8A–B). Larger size, body length 7.0 mm.................................................... C. scrobalis sp. nov.
-. Basal margin of clypeus not or shallowly raised, without sharp lateral ridges (Figs. 1C–D, 5C–D). Horizontal face of propodeum not margined, transition to posterior face rounded (Fig. 13G); inferior carina not developed and submarginal carina with a long and pointed projection above valvula (Figs. 1A–B, 5A–B). T1 without basal transverse carina; apical lamella of T2 largely pigmented at base and preceded by a thickening of tergite (Figs. 1A–B, 5A–B). Smaller size, body length less than 6.0 mm..................................................................................................... 7
7. Gena in dorsal view sinuate in front of posterior margin (Fig. 13K); occipital carina higher and lamellate on most of gena. Pronotal carina weaker on humeri, not pointing forward (Figs. 1A, 13K). Propodeum entirely black, at most with a narrow dark red margin at base of projection of submarginal carina (Figs. 1A–B). Punctures of head and mesosoma denser, interspaces much narrower than puncture diameter (Figs. 1A–D). Male: F11 apically pointed and reaching apex of F8. Female: clypeus ferruginous, punctures on disc of basal half coarse and dense, interspaces shorter than puncture diameter (Fig. 1D); legs entirely brownish red (Fig. 1B)......................................................... C. bekilyensis (Giordani Soika)
-. Gena in dorsal view evenly convex (Fig. 13L); occipital carina lower and not lamellate on gena. Pronotal carina sharp on humeri, pointing forward (Figs. 5A, 13L). Propodeum with large bright red markings covering most of dorsal faces and margins of other faces (Figs. 5A–B). Punctures of head and mesosoma sparser, interspaces about half as long as puncture diameter (Figs. 5A–D). Male: F11 apically rounded and not reaching base of F9. Female: clypeus red with yellow basal margin, punctures on disc of basal half small and sparse, interspaces longer than puncture diameter (Fig. 5D); legs reddish with pale yellow lines on outer face of fore and mid tibiae (Fig. 5B)................................................... C. parvulus sp. nov.
description: Published as part of Selis, Marco, 2024, Revision of the genus Cyrtolabulus van der Vecht in Madagascar (Hymenoptera: Vespidae: Eumeninae), pp. 66-86 in Zootaxa 5406 (1) on pages 83-85, DOI: 10.11646/zootaxa.5406.1.3, http://zenodo.org/record/10611352