Aenictus prolixus, Shattuck, Steven O., 2008

Shattuck, Steven O., 2008, Review of the ant genus Aenictus (Hymenoptera: Formicidae) in Australia with notes on A. ceylonicus (Mayr), Zootaxa 1926, pp. 1-19 : 14

Aenictus prolixus sp. n.

( Figs 7, 8 , 18–20 , 29 )

Types. Holotype worker from Baroalba Gorge, 12°50’S 132°52’E, 18 Nov. 1972, R.W.Taylor & J.E.Feehan, Acc. N. 72.1076, rainforest, under stone (ANIC, ANIC32-002810). 18 paratype workers, same data as holotype (ANIC, MCZC, QMBA, ANIC32-015781).

Diagnosis. Head capsule entirely smooth and essentially uniformly coloured; scape relatively long (SI> 89); subpetiolar process large and rectangular. This species is most similar to A. acerbus and A. turneri but can be separated from these by the longer scapes.

Worker Description. Mandible triangular, with a large apical tooth and a smaller subapical tooth followed by 6–7 (rarely 5) small teeth and a larger basal tooth; anterior clypeal border weakly convex to weakly concave, located at or anterior to anterior margins of frontal lobes in full face view; parafrontal ridges absent; subpetiolar process a large rectangular project, an elongate flange sometimes present on the posterior corner; head entirely smooth, pronotum weakly reticulate on collar, smooth posteriorly and laterally, mesonotum smooth, mesopleuron and propodeum finely punctate with longitudinal rugae laterally; body yellow-red, mesosoma slightly darker.

Measurements. Worker (n = 13) - CI 81–90; HL 0.55–0.62; HW 0.46–0.54; MTL 0.43–0.57; ML 0.84– 0.98; SI 89–96; SL 0.42–0.51.

Additional material examined: Australia: Northern Territory: Baroalba Gorge (Taylor,R.W. & Feehan,J.E.) ( ANIC); Fauna Survey Central Arnhem Land, P41, Djabidy Djabidy ( Mann,S.) ( TERC); Fauna Survey Darwin Region, P48, Tjenya Falls ( Mann,S.) ( TERC); Fogg Dam (Reichel,H.) ( TERC); Gove (Majer,J.D.) ( ANIC); Holmes Jungle, Darwin Region (Andersen,A.N.; Reichel,H.) ( TERC); Howard Springs Res. (Hoffmann,B.) ( TERC); Mary River Study, Mt. Daly (Armstrong,M.) ( TERC); Murgenella (Tiedeman,S.C.) ( ANIC); Surprise Ck. Falls, Litchfield Park (Hoffmann,B.) ( TERC); Queensland: 3km ENE Mt. Tozer (Cardale,J.C.) ( ANIC); 4.5km NNW Cape Tribulation (Ward,P.S.; Wild,A.L.) ( ANIC); Horne Creek, 23km N Coen (Ward,P.S.) ( ANIC); Iron Range (Jenkins,R.) ( ANIC); Kuranda, Black Mt. Road (Taylor,R.W. & Feehan,J.) ( ANIC); Lizard Island (Hoffmann,B.; Shepherd,U.) ( TERC); Moses Ck., 4 km N by E Mt. Finnigan (Cardale,J.C.) ( ANIC); S3 Mission Beach (Cermak,M.) ( ANIC); Torres Strait, Murray Is. (Heatwole,H.) ( ANIC); Weipa, MRRP Study Site N26 (Andersen,A.N.) ( TERC).

Comments. This common species is found in northern Northern Territory and northern Queensland. It is most similar to A. acerbus and A. turneri but can be separated as outlined above under Diagnosis. It is probable that at least some of the males here associated with A. hilli may actually belong to this species.

Figures

FIGURES 7 – 8. Fig. 7, Graph of head length versus head width. Fig. 8, Graph of scape length versus head width.

FIGURES 15 – 20. Aenictus philiporum Wilson worker. Fig. 15, front of head; Fig. 16, dorsal view of body; Fig. 17, lateral view of body. Aenictus prolixus sp. n. worker. Fig. 18, front of head; Fig. 19, dorsal view of body; Fig. 20, lateral view of body.

FIGURES 24 – 30. Distribution of material examined during this study. Fig. 24, A. acerbus; Fig. 25, A. aratus; Fig. 26, A. diclops; Fig. 27, A. nesiotis; Fig. 28, A. philiporum; Fig. 29, A. prolixus; Fig. 30, A. turneri.