Bactrocera (Calodacus) chettalli David & Ranganath

David, K. J., Ramani, S., Whitmore, Daniel & Ranganath, H. R., 2016, Two new species and a new record of Bactrocera Macquart (Diptera: Tephritidae: Dacinae: Dacini) from India, Zootaxa 4103 (1), pp. 25-34: 29-31

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Bactrocera (Calodacus) chettalli David & Ranganath


b. Bactrocera (Calodacus) chettalli David & Ranganath  , sp.nov.

Diagnosis. Medium sized species (5.80−6.21 mm); face fulvous with two separate, elongate/oval black spots; scutum black with narrow postsutural lateral yellow vitta (0.08−0.10 mm wide) ending at intra-alar seta; notopleuron and postpronotal lobe yellow, no yellow spot anterior to notopleural suture; anepisternal stripe almost reaching anterior margin of notopleuron dorsally; scutellum with a narrow black basal band; wing predominantly hyaline with a narrow costal band slightly overlapping vein R 2 + 3, anal streak narrow, no dense aggregation of microtrichia around A 1 +Cu 2; abdominal tergites III −V orange-brown with a longitudinal black band, lateral regions of tergites III −V with black markings.

Description. Holotype female. Head ( Fig. 14View FIGURES 14 – 18): Height 1.20 mm. Frons length 1.45 times breadth; fulvous with fuscous markings on anteriomedial hump and around bases of frontal and orbital setae, all setae black: 2 pairs of frontal setae and 1 pair of orbital setae; lunule black. Ocellar triangle and vertex black. Face fulvous with two separate, elongate/oval black spots (0.26 mm long) on antennal furrows. Scape (0.25 mm long) and pedicel (0.20 mm long) fulvous, first flagellomere (0.71 mm long) dark fuscous on outer side and apex, arista non plumose. Gena fulvous with black marking and a seta. Occiput fuscous to black, fulvous along eye margins; lateral and medial vertical setae present, occipital row with 7−8 black, stout setae.

Thorax ( Figs 15−16View FIGURES 14 – 18): 2.24 mm long, 1.68 mm wide; scutum black with red-brown below and behind lateral postsutural vitta, around notopleural suture and inside postpronotal lobe. Pleural area black with red-brown below postpronotal lobe. Yellow markings as follows: postpronotal lobe, notopleuron, anepisternal stripe almost reaching between anterior margin of notopleuron and anterior notopleural seta dorsally and continuing to katepisternum as a transverse spot; anatergite (posterior apex black); anterior 3 / 5 of katatergite (remainder black); narrow parallelsided postsutural lateral vitta ending at intra-alar seta. Medial longitudinal postsutural yellow vitta absent. Scutellum yellow with narrow black basal band, subscutellum wholly black. Chaetotaxy: scutellar seta, 1; prescutellar acrostichal seta, 1; intra-alar seta, 1; presutural supra-alar seta, 1; postalar seta, 1; anepisternal seta, 1; anterior notopleural seta, 1; posterior notopleural seta, 1; scapular setae, 2.

Leg ( Fig. 16View FIGURES 14 – 18): Coxa and trochanter black; all femora fulvous with black markings (basal 0.67 of fore femur, 0.5 of outer surface of mid femur; apex of hind femur). Fore and hind tibiae dark fuscous, 0.75 of mid tibia fuscous, remainder fulvous, all tarsal segments fulvous.

Wing ( Fig. 18View FIGURES 14 – 18): Length, 4.75 mm, cells bc and c hyaline; microtrichia in outer corner of cell c only; remainder of wing hyaline except dark fuscous cell sc, costal band slightly overlapping vein R 2 + 3, slightly expanded at apex, ending well before the middle of cell r 4 + 5, anal streak narrow, confined to cell bcu, no dense aggregation of microtrichia around A 1 +Cu 2; supernumerary lobe weak.

Abdomen ( Fig. 17View FIGURES 14 – 18): 2.29 mm long, 2.2 mm wide, oval, tergites free, tergite I black with a narrow transverse red-brown band across posterior margin; tergite II orange-brown with a black transverse band not reaching lateral margins. Tergite III entirely black except for reddish brown narrow regions near the middle. Tergites III −V with a medial longitudinal black band. Tergite V with shining spots (ceromata). Oviscape reddish brown, 1.98 mm long; spicules (0.006 mm high, 0.01 mm wide) of eversible membrane (2.26 mm) with one to three blunt projections, median one 2−3 times higher than lateral ones ( Fig. 19View FIGURES 19 – 23); aculeus (1.80 mm) curved apically, aculeus tip bluntly pointed ( Fig. 20View FIGURES 19 – 23), with four pairs of preapical setae (all of equal length).

Male: As female except: short posterior lobe of surstylus and deep emargination of posterior margin of sternite V. Pecten absent on tergite III. Proctiger membranous, as wide as epandrium, epandrium sclerotised, as long as wide (0.3 mm); surstyli short, 0.2 mm long; posterior lobe of surstylus not longer than anterior lobe ( Figs 21, 22View FIGURES 19 – 23). Aedeagus 3.12 mm long excluding glans (0.39 mm). Glans of phallus sclerotised with trumpet-shaped subapical lobe, well developed praeputium and unpatterned acrophallus, basal lobe absent ( Fig. 23View FIGURES 19 – 23).

Host plant. Spondias pinnata Kurz.  ( Anacardiaceae  ).

Material examined. Holotype ♀, INDIA: Karnataka, Chettalli  , 12.vii. 2012, Ranganath H.R. reared from Spondias pinnata  (deposited at NBAIR); Paratypes: INDIA: 6 ♀♀, 9 ♂♂, same data as holotype (deposited at NBAIR); 1 ♀, 1 ♂, same data as holotype (deposited at UASB).

Etymology. The specific epithet is a noun in apposition and refers to the type locality.

Remarks. Bactrocera (Calodacus) chettalli  is similar to B. (C.) symplocos  ( Figs 24−30View FIGURES 24 – 27View FIGURES 28 – 30), described from Thailand, in having a black scutum, black lateral markings on abdominal tergites III −V and fuscous markings on all femora. It differs from the latter in having narrow postsutural lateral yellow vittae (0.09 to 0.10 mm), narrow costal band slightly overlapping vein R 2 + 3 and not reaching middle of cell r 4 + 5, extensive fuscous markings on all femora, a longer aedeagus (3.12 mm), blunt projections of spicules on distal end of eversible membrane and a broadly pointed aculeus tip ( Fig. 20View FIGURES 19 – 23), whereas B. symplocos  has broad postsutural lateral yellow vittae (> 0.15 mm), a broad costal band confluent with R 4 + 5 of uniform width reaching the middle of cell r 4 + 5, narrow femoral markings, shorter aedeagus (2.1 mm), sharp projections of spicules on distal end of eversible membrane and sharply pointed aculeus tip ( Fig. 29View FIGURES 28 – 30).


University of Agricultural Sciences