A taxonomic revision of the Malagasy endemic subgenus Mayria of the genus Camponotus (Hymenoptera, Formicidae) based on qualitative morphology and quantitative morphometric analyses Author Rasoamanana, Nicole https://orcid.org/0000-0001-9702-7231 Madagascar Biodiversity Center, BP 6257, Parc Botanique et Zoologique de Tsimbazaza, Antananarivo, Madagascar rsoanarivo35@gmail.com Author Fisher, Brian L. https://orcid.org/0000-0002-4653-3270 text ZooKeys 2022 2022-01-17 1081 137 231 http://dx.doi.org/10.3897/zookeys.1081.71872 journal article http://dx.doi.org/10.3897/zookeys.1081.71872 1313-2970-1081-137 8ED559A3F2D444F88A13AF880D6B5A6C B8C62CFD7F495CEE8F18C5BD0A8B8281 Camponotus ivadia sp. nov. Figures 9D , 50C, D , 65 Holotype worker. Madagascar, Province Antsiranana, Foret d' Ampondrabe, 26.3 km 10° NNE Daraina, tropical dry forest, on low vegetation, -12.97, 49.7, 175 m, 04 November 2009 (BLF) collection code: BLF10105, specimen code: CASENT0498634 (CAS). Paratype. One worker with same data as holotype but specimen coded as CASENT0498635 (CAS). Worker diagnosis. Integument dark brown, apparently shiny; hairs on mesosoma and petiole blunt-tipped; fine, pointed hairs on head and gastral dorsum; anterior clypeal margin with straight rectangular lobe; dorsal outline of mesosoma nearly evenly arcuate; petiole higher than long. Description of minor worker. Medium-sized species. Absolute cephalic size (CS: 1.21 +/- 0.19, 1.13-1.30). In full-face view, head almost quadrate, with feebly convex posterior and lateral border (CWb/CL: 0.35 +/- 0.03, 0.33-0.36). Eyes elliptical, placed next to the lateral margins of head (PoOC/CL: 0.10 +/- 0.01, 0.10-0.11). Mandibles triangular with six teeth. Anterior clypeal margin angularly produced, with straight lateral border and rounded anterolateral corner. Antennal scape long, surpassing the occipital corner by the length of two basal funiculi (SL/CS: 0.39 +/- 0.02, 0.38-0.40). In lateral view, pronotum with short anterolateral margination, mesosoma moderately convex, propodeum angular in profile, with unequal basal and declivitous faces, each straight in profile and meeting at a rounded obtuse angle (MW/ML: 0.21 +/- 0.03, 0.19-0.22; MPH/ML: 0.16 +/- 0.01, 0.16-0.17). In lateral view, petiole rather narrow, its anterior face convex and its posterior face flattened. Body finely imbricate. Hairs whitish; enlarged, whitish hairs with blunt tip on mesonotum, propodeum, and petiolar dorsum; filiform, pointed, grayish hair on head, pronotum, and gastral segment; pubescence white, short, and more abundant across entire dorsum. Head, mesosoma and gaster dark brown, femora, tibia, and funiculi brown, scape and basitarsi slightly lighter. Figure 65. Camponotus ivadia minor worker (CASENT0498634) 1 body in lateral view 2 head in full-face view 3 body in dorsal view. Description of major worker. Characteristics of minor workers, except: head as long as wide, posterior borders medially concave and subparallel, lateral sides diverging apically (CS: 1.93; CWb/CL: 0.93). Eyes circular, placed dorsally in the middle of the lateral borders (PoOC/CL: 0.28). Anterior clypeal margin forms a short, rounded, rectangular lobe, slightly concave medially (ClyL/GPD: 0.84). Antennal scape short, just reaching the occipital border (SL/CS: 0.69). Sculpture, pilosity, and color as in minor worker. Distribution and biology. Camponotus ivadia has thus far been collected only in the Foret d' Ampondrabe within Ankarana Reserve, a region with tropical dry forest located in the northern portion of Madagascar (Fig. 70F ). All specimens were collected by beating vegetation. Discussion. This species is easily recognized within the Camponotus madagascarensis group as one of few back and shiny species with white standing pubescence. Etymology. The species epithet Camponotus ivadia is derived from the low vegetation microhabitat it prefers. Additional material examined. Province Antsiranana : Res . Ankarana, 7 km SE Matsaborimanga, -12.9, 49.11667, 150 m , tropical dry forest (PSW) (PSWC); Foret d' Ampondrabe, 26.3 km 10° NNE Daraina, -12.97, 49.7, 175 m , tropical dry forest (B.L. Fisher) (CAS).