Strumigenys baudueri group

Strumigenys baudueri group Bolton (2000)

Worker Diagnosis
Mandibles in full-face view and at full closure triangular to elongate triangular, with serially dentate masticatory margins that engage throughout their visible length. In ventral view outer margin of mandible without a prebasal inflected angle. MI 12-20.

Dentition. A row of 7 triangular teeth follows the basal lamella, without a diastema between basal lamella and basal tooth; these 7 are followed by 4-6 minute denticles and a small apical tooth to give a total dental count of 12-14.

Basal lamella of mandible an elongate rounded lobe that is not visible or is partially visible in full-face view with the mandibles fully closed.

Labral lobes elongate-triangular to conical.

Clypeus in full-face view with sides converging anteriorly, the anterior margin narrowly or very narrowly convex, sometimes forming an anteromedian blunt point. Clypeal margin not projecting far laterally beyond the outer margins of the mandibles.

Clypeal lateral margins with small anteriorly curved simple to narrowly spatulate hairs that are decumbent to appressed, but without a freely projecting fringe of bizarre hairs; dorsum of clypeus with small, simple to spatulate hairs that are usually decumbent to appressed.

Preocular carina conspicuous in full-face view.

Ventrolateral margin of head between eye and mandible bluntly angular to rounded.

Postbuccal impression a distinct notch in profile.

Cuticle of side of head within scrobe reticulate-punctate.

Scape short to very long, SI 61-116, cylindrical to subcylindrical, the dorsum and ventre not converging anteriorly to form a flange or thin lamella at the leading edge.

Ventral surface of scape convex to shallowly concave.

Leading edge of scape without specialised projecting hairs; any hairs that are present are small, simple to narrowly spatulate, subdecumbent to appressed, and all directed toward the apex of the scape.

Pronotum with a median longitudinal carina present (Afrotropical species) or absent (Palaearctic species).

Propodeu m with a pair of triangular teeth subtended by a lamella on the declivity; differentiated propodeal lobes absent from base of declivity.

Spongiform appendages of waist strongly developed, the ventral curtain on the petiole deeper than the thickness of the peduncle in profile. Base of first gastral sternite usually without a dense pad or crest of spongiform tissue; some compacted pilosity may be present.

Pilosity. Pronotal humeral hair present, either flagellate or long-filiform and curved. Dorsolateral margins of head in full-face view with one or more pairs of projecting elongate specialised hairs, either flagellate or filiform. Standing hairs on dorsal surfaces of alitrunk, waist and first gastral tergite simple to flagellate. Ground pilosity of head usually dense, of small curved simple to narrowly spatulate hairs.

Sculpture. Dorsum of head behind clypeus reticulate-punctate. Pleurae, sides of propodeum and disc of postpetiole smooth and shining.