Corresponding author: Himender Bharti (
Academic editor: Brian Fisher.
A new species of carpenter ant, collected in the Shivalik range of Himalaya is described and illustrated based on the worker and gyne castes under the name
Carpenter ants are among the largest and most common ants in the world and are found in all biogeographical regions (
The significant contributions pertinent to this study include
The specimens were collected by hand in the foothills of Indian Himalaya, the Shivalik range. Specimen examination was conducted with a Nikon SMZ 1500 stereomicroscope. For digital images, an MP evolution digital camera was used on the same microscope using Auto-Montage (Syncroscopy, Division of Synoptics, Ltd.) software. These images were processed with Adobe Photoshop CS5. Holotype and paratypes have been deposited in PUPAC, Punjabi University Patiala Ant Collection, Patiala. One paratype will be deposited at BMNH, Natural History Museum, London, UK and one at California Academy of Sciences, San Francisco, USA. Morphological definitions for measurements (accurate to 0.01 mm) include:
(Total Length) – HL+ML+PL+GL
(Head Length) – length of head, excluding mandibles, measured in a straight line from anteriormost point of median clypeal margin to midpoint of occipital margin in full-face view
(Head Width) – maximum width of head, measured in full-face view
(Eye Length) – maximum length of eye as measured in oblique view of the head to show full surface of eye
(Scape Length) – straight-line length of antennal scape excluding condylar bulb
(Mesosoma Length) – diagonal length of mesosoma in lateral view from the point at which pronotum meets cervical shield to posteroventral corner of mesosoma
(Pronotum Width) – maximum width of pronotum in dorsal view
(Petiole Length) – In profile, the maximum length of the petiole node, measured in a straight horizontal line from immediately above the dorsal base of the anterior petiolar tubercle to the posterior margin
(midtibia Length) – maximum length of midtibia in lateral view, with tibial base and apex in the same plane of focus, and with tibia at right angle to femur
(hindtibia Length) – maximum length of hindtibia in lateral view, with tibial base and apex in same plane of focus, and with tibia at right angle to femur
– length of the gaster in lateral view from the anteriormost point of first gastral segment to the posteriormost point of the last segment
Head: Head subtriangular, longer than wide in major worker (HW/HL = 0.86, n = 1), with arched margins laterally, posterior margin shallowly concave (Fig.
Mesosoma: Mesosomal outline in lateral view smoothly arched; propodeal dorsum forming obtuse angle with declivity (Fig.
Petiole: petiolar scale broad, dorsally convex.
Sculpture: Head microreticulate, reticulation coarser on gena; mesosoma finely reticulate, gastral reticulations even feebler, appearing gently transversally striate. Mandible and scape with scattered punctures. Entire body shiny.
Vestiture: Pilosity yellowish; head, mesosoma, and all gaster segments with dense, erect, long setae; gena, entire ventral surface of head and mandible with dense shorter erect and suberect setae; scape with short, subapressed hairs; hindtibia without row of spiny bristles on ventral margin in addition to 3–4 suberect setae at distal end near spurs; body covered with very short, appressed, white pubescence, more distinct on head and gaster.
Color: Body black, regardless of size: antenna and leg reddish brown; trochanters yellow brown.
As in major worker, with modifications expected for caste and the following differences: head more elongate, sides relatively straight, occipital margin convex; mandible, clypeus and gena brownish. Head narrower than in conspecific major workers; mandible 7 toothed; scape barely reaches the posterior margin of head. Reticulate sculpture more pronounced on head; scutum with scattered wide, shallow punctures. Propodeum dorsum forms right angle with declivity.
The species epithet
This species seems to be rare in the Shivalik range of Northwest Himalaya although collected from both forested and non-forested areas of the region. Most workers were collected from vegetation while gynes and some workers were found under a large stone.
1 | Mesosomal profile continuous, forming a regular arch; the metanotal groove very shallow |
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– | Mesosomal profile discontinuous, not forming a regular arch; interrupted at the deep metanotal groove |
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2 | Propodeal spiracle round or oval |
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– | Propodeal spiracle elongate, slit shaped |
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3 | Pronotum dentate; body very densely pilose; hindtibia without spiny bristles on ventral margin |
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– | Pronotum edentate; body sparsely pilose; hindtibia with spiny bristles on ventral margin |
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4 | Petiole emarginate above; entirely black |
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– | Petiole rounded above; head and mesosoma reddish, gaster blackish |
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5 | Gaster covered with fine sericeous pubescence |
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– | Gaster without any fine sericeous pubescence |
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6 | Clypeus in full-face view with broadly rounded anterolateral corner; free margin distinctly emarginated medially |
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– | Clypeus in full-face view with right-angled anterolateral corner; free margin entire |
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7 | Tibiae compressed, prismatic |
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– | Tibiae tubular, not prismatic |
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8 | Black and shining; setae on lateral and ventral sufraces of head dense |
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– | Mesosoma light brown, head and gaster blackish, relatively dull; setae on lateral and ventral surfaces of head sparse |
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9 | Hind tibiae without longitudinal row of spiny bristles on ventral margin in addition to 3–4 suberect setae apically, near spurs |
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– | Hindtibia with at least one row of spiny bristles on ventral margin |
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10 | Head and gaster blackish-brown or black; mesosoma and leg yellow-brown to ferruginous-red |
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– | Body uniformly dark black |
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11 | Body completely black |
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– | Body not completely black |
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12 | Head, mesosoma and leg ferruginous-red to reddish-brown; gaster reddish brown or blackish-brown |
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– | Head black; mesosoma and gaster and legs partly yellow brown |
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Financial assistance rendered by the Ministry of Environment and Forests (Grant No. 14/10/2007-ERS/RE), Govt. of India, New Delhi is gratefully acknowledged. The authors thank Ms. Christiana Klingenberg for providing digital images of type material of
Equally contributed.
Major worker Head, full face view.
Major worker Body, lateral view.
Major worker Body, dorsal view.
Minor worker Head, full face view.
Minor worker Body, lateral view.
Minor worker Body, dorsal view.
Gyne Head, full face view.
Gyne Body, lateral view.
Gyne Body, dorsal view.