Leptogenys luederwaldti

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Leptogenys luederwaldti
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Leptogenys
Species: L. luederwaldti
Binomial name
Leptogenys luederwaldti
Forel, 1913

Leptogenys luederwaldti P.jpg

Leptogenys luederwaldti D.jpg

Specimen Label

Synonyms

Specimens from Caraguatatuba Brazil were collected in rain forest.

Identification

Lattke (2011) - A member of the luederwaldti species group. Head elongate in full-face view; eye situated dorsolaterally on head in full-face view, and close to mid-length of lateral cephalic margin; large, occupying close to one-third lateral cephalic margin; scape surpasses posterior cephalic border by one-fourth its length; second funicular segment more than 3 × longer than first; mandible triangular. Petiole elongate and fulcrum-shaped in dorsal view, lateral margins concave, slender anterad; petiole in lateral view triangular.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

The biology of Leptogenys luederwaldti is poorly known.

The Leptogenys genus page has more details about the general biology of ants in this genus, some of which is summarized in what follows. New World species have relatively small ranges, generally occur in humid forests and prey on isopods. Colonies may occur in high densities on a local scale, with up to 5 or 6 species present. Nest size tends to be small with just 20 or 30 individuals in a mature colony. Nests of most species may be found in rotten wood on the ground, usually within cavities in logs or large branches, and also beneath bark. Wood-soil and rock-soil interfaces are another common nesting location, as well as rock crevices, and a few species may nest directly in the soil. Reproduction is most commonly via ergatoid females and, in many species, may include egg-laying workers.

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • luederwaldti. Leptogenys (Lobopelta) luederwaldti Forel, 1913l: 206 (w.) BRAZIL. Lattke, 2011: 186 (q.m.). Senior synonym of anacleti: Lattke, 2011: 186.
  • anacleti. Leptogenys (Lobopelta) anacleti Borgmeier, 1930: 30, pl. 3, fig. 9; pl. 4, figs. 18, 19 (w.) BRAZIL. Junior synonym of luederwaldti: Lattke, 2011: 186.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Lattke (2011) - Metrics (n = 5) : HL 1.28 – 1.35; HW 0.81 – 0.81; ML 0.57 – 0.64; EL 0.27 – 0.30; SL 1.48 – 1.62; PW 0.71 – 0.74; WL 2.19 – 2.33; PH 0.67 – 0.84; PL 0.84 – 0.88; DPW 0.40–0.47 mm. CI 0.60–0.63; MI 0.71–0.79; OI 0.33 – 0.38; SI 1.83 – 2.00; LPI 0.80 – 0.96; DPI 0.48 – 0.54.

Head elongate in full-face view, head widest at mandibular insertion, lateral margin broadly convex, posterior margin straight to concave, with prominent vertexal carina. Eye situated dorsolaterally on head in cephalic full-face view, and close to mid-length of lateral cephalic margin; large, occupying close to one-third lateral cephalic margin; cephalic dorsum mostly smooth and shining. Clypeus with longitudinal striae medially and oblique striae laterally; median clypeal lobe prominent, evenly tapering to sharp point, lateral lobe narrow and weakly convex. Scape surpasses posterior cephalic border by one-fourth its length; second funicular segment more than 3 × longer than first; third segment little more than half length of second. Mandible triangular, edentate except for apical tooth, dorsum smooth and shining; basal margin slightly convex, masticatory margin more than half length of basal margin; lateral basal sulcus present; PF: 4,3.

Mesosoma with broadly convex promesonotal margin and straight to broadly convex dorsal propodeal margin in lateral view, dorsal propodeal margin more than twice length of declivitous margin, metanotal groove deeply impressed, propodeal declivity with broad triangular tooth that forms continuity with dorsal margin, apex of tooth at spiracular level. Space between propodeal spiracle and apex of tooth with 3–5 oblique striae, striae continue transversely across dorsal half of propodeal declivity, ventral half with singe broad, transverse sulcus. Body sculpturing almost all smooth and shining, mesometapleural suture well impressed and scrobiculate; mesopleuron bordered anteroventrally by low carina.

Petiole elongate and wedge-shaped in dorsal view, lateral margins concave, slender anterad; petiole in lateral view triangular, anterodorsal margin broadly convex, node highest posterad, posterior margin mostly vertical, weakly concave. Subpetiolar process shaped as rounded or triangular lobe. Propodeal spiracle elongate and vertical, slightly wider dorsad than ventrad. Abdominal segment III with anterodorsal margin convex in lateral view, constriction between abdominal segments III and IV well marked. Body wanting pubescence, pilosity sparse, mostly on head and ventral parts; dorsal pilosity usually subdecumbent, pronotum with two erect hairs anterad; scape with abundant subdecumbent pilosity. Body and scape black with blue opalescence; legs, funiculus, clypeus, and mandibles brown to dark brown.

Queen

Lattke (2011) - Metrics (n = 1): HL 1.92; HW 1.21; ML 0.94; EL 0.51; SL 2.29; PW 1.11; WL 3.10; PH 1.04; PL 1.08; DPW 0.74 mm. CI 0.63; MI 0.78; OI 0.42; SI 1.89; LPI 0.97; DPI 0.69. Vestigial 3 ocelli present on posterior cephalic dorsum, propodeum evenly convex in lateral view; petiolar node with sinuous anterior margin in lateral view, dorsal margin sloped and mostly straight to slightly convex, apex convex, posterior margin broadly convex; node in dorsal view shaped as rough equilateral triangle with blunt corners; gaster noticeably swollen compared with workers. General body color ferruginous brown.

Male

Lattke (2011) - Metrics (n = 1): HL 1.01; HW 1.25; ML 0.27; EL 0.74; SL 0.34; PW 1.31; WL 2.86; PH 0.91; PL 1.01; DPW 0.54 mm. CI 1.23; MI 0.22; OI 0.59; SI 0.27; LPI 0.90; DPI 0.53. Cephalic dorsum mostly smooth and shining, clypeus with low rugulae; abundant subdecumbent to decumbent hairs on head; antennae bristly, with abundant subdecumbent hairs. Pronotum, prosternum, mesoscutum mostly smooth and shining, prosternum with longitudinal striae along basal margin; scutellum and posterior portion of scutum with longitudinal striae; metanotum with median tumosity, propodeum rugulose. General color yellow with flagellum and gaster slightly brown-yellow.

Type Material

Lattke (2011) - Leptogenys (Lobopelta) luederwaldti. Holotype worker: Brazil, Santa Catherina, Hammonia, Ihering no. 16841 (Lüderwaldt) (Musee d'Histoire Naturelle Genève) [examined].

Leptogenys (Lobopelta) anacleti. Holotype worker: Brazil, Rio de Janiero, Petropolis, i.1928, Cat. No. 3390 (A. Wiltuschnig) (Instituto Butantan) [examined].

The type specimen (Geneva) is a worker with the handwritten labels: L. Lüderwalti. Worker symbol. Col by Jhering für [illegible] Hammonia, Sta Catharina; 16.841; Typus; coll Forel. This specimen is considered the holotype (by monotypy) as in the same paper Forel (1913) gives an interval of length variability for other ant species when he examined several specimens, but for L. luederwaldti there is only one length, and one locality. An Ipiranga specimen has a red cotypus (= syntype) label, a handwritten L. luderwalti For. label and small label with the number 11.567. It has the propodeal teeth low in comparison with other L. luederwaldti specimens. Forel (1913) only mentions the Hammonia specimens in his description so why this specimen should bear a cotype label is unclear. The type (Musee d'Histoire Naturelle Genève) compares well with the Boraceia specimens.

References