Key to Carebara of India Majors

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This worker key is based on: Akbar, S.A., Bharti, H. 2017. A new species of the ant genus Carebara Westwood (Hymenoptera: Formicidae) from India. Journal of the Entomological Research Society 19: 35-43.

Among the known Indian species of the genus 10 species; Carebara bengalensis, Carebara carinata, Carebara lamellifrons, Carebara leei, Carebara lignata, Carebara propomegata, Carebara raja, Carebara rothneyi, Carebara similis, and Carebara wroughtonii do not have the description of majors and are not included in the key.

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  • Head truncate, shield like, with frontal lobes extended forward forming broad rounded lamina; posterolateral edges sharply angulate (Oriental Region: India; Kerala; Iritty; Karnataka; Gundlupet) . . . . . Carebara nayana
  • Head rectangular in shape, longer than broad, sides straight to weakly convex; posterolateral corners rounded . . . . . 3

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  • Head with a deep median longitudinal groove and a single ocellus, body strongly sculptured, relatively larger in size and dark reddish brown to black in color, SI 41-42 (Wide spread: Afrotropical Region, Indo-Australian Region, Oriental Region, Palaearctic region) . . . . . Carebara diversa
  • Head without deep median longitudinal groove and without ocellus, body weakly sculptured, relatively smaller in size and reddish brown in color, SI 46-51 (Wide spread: Australasian region, Afrotropical, Indo-Australian Region, Oriental Region, Palaearctic region) . . . . . Carebara affinis

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  • Eyes distinct with numerous ommatidia (>8); base of first gastral tergite finely reticulate with traces of fine longitudinal rugae (Oriental Region: India;No image available) . . . . . Carebara aborensis
  • Eyes rudimentary with few ommatidia (<4); base of first gastral tergite smooth and shinning . . . . . 5

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  • Vertex without a pair of distinct horns or minute teeth . . . . . 6
  • Vertex with a pair of distinct horns or minute teeth . . . . . 7

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  • Head distinctly longer than broad, smooth and shiny (Oriental Region: India; Jammu and Kashmir; Bilawar) . . . . . Carebara rectangulata
Carebara rectangulata casent0906097 p 1 high.jpg
  • Head almost as broad as long with distinct striations sculpture throughout (Oriental Region: India, Sri Lanka) . . . . . Carebara nana

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  • Vertexal corners protruding into a pair of well developed acute horns or spines . . . . . 8
  • Vertex with a pair of minute horns or teeth in lateral view . . . . . 9

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  • Head rectangular with straight parallel sides, punctured only and finely longitudinally rugulose anteriorly;occiput and vertex smooth and shinning (Oriental Region: India;Himachal Pradesh; Andretta) . . . . . Carebara hornata
Carebara hornata casent0906094 p 1 high.jpg
  • Head with convex sides, sparsely punctured and longitudinally obscurely striated anteriorly;occiput and vertex wrinkled (Oriental Region, Palaearctic region) . . . . . Carebara asina

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  • Propodeum unarmed, posterodorsal corner rounded or bluntly angled . . . . . 10
  • Propodeum with a pair of protruding dents or spines ......... . . . . . 13

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  • Cephalic dorsum unsculptured, smooth and shining;vertexal horns reduced (Oriental Region: India; Himachal Pradesh; Mandi, Andretta, Jammu and Kashmir; Kathua; Punjab; Maharaja Ranjeet Sagar Dam; Uttarakhand; Forest Research Institute) . . . . . Carebara dentata
Carebara dentata casent0906090 p 1 high.jpg
  • Cephalic dorsum sculptured, dull;vertexal horns more prominent . . . . . 11

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  • Cephalic dorsum with a single median ocellus. Lateral sides of head straight (Oriental Region: India; Kerala; Salim Ali Bird Sanctuary) . . . . . Carebara quratulain
  • Cephalic dorsum without a single median ocellus. Lateral sides of head convex . . . . . 12

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  • Posterodorsal corner of propodeum smoothly rounded; dorsum of head weakly sculptured . . . . . Carebara rectidorsa
  • Posterodorsal corner of propodeum clearly bluntly angled; dorsum of head strongly sculptured (Oriental Region: India; Arunachal Pradesh, Lumla, Kerala, Periyar tiger reserve, Thanikkudy) . . . . . Carebara terayamai

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  • Head with lateral sides convex, almost as long as broad (CI 84-85) (Oriental Region: India; Uttarakhand; Dakpathar, Rajaji forest; Himachal Pradesh; Ghati, Lwasa; Jammu and Kashmir; Shukrala) . . . . . Carebara spinata
Carebara spinata casent0906099 p 1 high.jpg
  • Head with parallel lateral sides, longer than broad (CI 74-78) . . . . . 14

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  • Anterior margin of clypeus concave without lateral developed teeth;Propodeal spines well developed;masticatory margin of mandible with 5-teeth (Oriental Region: India; Arunachal Pradesh; Lumla; Sikkim; Rorathang; Kerala; Periyar tiger reserve, Thanikkudy) . . . . . Carebara obtusidenta
  • Anterior margin of clypeus with two prominent lateral teeth;Propodeal spines reduced;masticatory margin of mandible with 4-teeth (Oriental Region: India; Kerala; Silent Valley National park) . . . . . Carebara mukkaliensis