Revision of the Malagasy Camponotus subgenus Myrmosaga (Hymenoptera, Formicidae) using qualitative and quantitative morphology Rakotonirina, Jean Claude Fisher, Brian L. ZooKeys 2022 2022-05-03 1098 1 180 http://zoobank.org/A47440D3-8DC7-474C-88A4-9F060DF006C2 Rakotonirina & Fisher, 2022 Rakotonirina & Fisher 2022 Insecta Formicidae Camponotus CoL Animalia Camponotus karsti Hymenoptera 0 1 Arthropoda species karsti sp. nov.   Figs 5A , 62  Holotype worker.  Madagascar: Province Antsiranana: RS Ankarana, 7 km SE Matsaborimanga, -12.9, 49.11667, 150 m, tropical dry forest, low vegetation, 27 Nov 1990 (P.S. Ward) collection code: PSW11005, specimen code: CASENT0217292 (CAS).  Paratype. 1 minor worker with same data as holotype but respectively specimen coded as: CASENT0837940 (CAS).  Additional material examined.    Madagascar: Antsiranana: RS Ankarana,  7 kmSE Matsaborimanga, -12.9, 49.11667,  150 m, Dry Forest, ( P.S. Ward) (CAS).  Diagnosis. With head in full-face view, eye not breaking lateral cephalic margin; mesonotum short and lacking constriction; promesonotum an even convexity; propodeum with blunt angle at ca. posterior 1/2; anterior margin of petiolar node in profile very low, dorsal surface noticeably horizontal, ca. 2 xas long as posterior surface.  Description.  Minor worker.With head in full-face view, lateral margins anterior to eye level approximately parallel, progressively rounding evenly towards slightly concave rear margin; eye protruding and large (EL/CL: 0.26 +/-0.01; 0.25-0.26), not breaking lateral cephalic margin, location of its posterior margin at posterior 1/4 of head (PoOc/CL: 0.26 +/-0.01; 0.25-0.27); frontal carinae parallel, not widely opened posteriorly (FR/CS: 0.25); clypeus with blunt or poorly defined anterolateral angle, anteromedian margin broadly convex; two apical teeth of mandible normally spaced; antennal scape relatively long (SL/CS: 1.65 +/-0.03; 1.63-1.67). Promesonotum noticeably convex, followed by a slightly visible metanotal groove; anterior portion of propodeal dorsum sloping along its first 1/2 then slightly convex and rounding to declivity surface. Anterior margin of petiolar node ca. 1/2 height of posterior margin, dorsal margin separated by an angle from anterior margin and inclined posteriorly to jointly rounding to posterior margin. First and second gastral tergites without a pair of white spots; erect hairs on lateral margin of head present on anterior and behind eye level; posterior margin of head with two elongate, erect hairs; antennal scape covered with appressed hairs; junction of propodeal dorsum and declivity with two pairs of erect hairs.  Major worker.Unknown.  Distribution and biology. The distribution of  C. karstiis limited to the dry forest of the RS Ankarana in the north of Madagascar (Fig. 62D). Nest site for this species is unknown, but foraging is carried out on lower portions of vegetation.   Figure 62.  Camponotus karsti Alateral view Bhead in full-face view Cdorsal view of holotype minor worker CASENT0217292 Ddistribution map.  Discussion.   Camponotus karstican be confounded with  C. harenarumbecause both species are characterized by the presence of a blunt angle at approximately the posterior 1/2 of propodeal dorsum. However,  C. harenarumcan be distinguished by the separate convexity of its mesonotum and anterior 1/2 of propodeum, and its petiolar node is approximately as high as long.  Etymology. The species name  Camponotus karstiis a non-Latin singular noun used in apposition. 2022-01-01 2022-12-31 2022-01-01 RS Ankarana, P. S. Ward Madagascar 150 Dry Forest 1 Antsiranana