Aulacogenia darjeelingensis, Mukherjee, Paramita, Cai, Wanzhi & Saha, G. K., 2015

Mukherjee, Paramita, Cai, Wanzhi & Saha, G. K., 2015, A new species of Aulacogenia Stål (Hemiptera: Heteroptera: Reduviidae: Stenopodainae) from India, Zootaxa 3904 (3), pp. 415-420 : 416

Aulacogenia darjeelingensis sp. nov.

( Figs. 1–14 )

Description. Macropterous.

Colour. Yellowish brown with irregular darker markings; eyes brownish black; with Y-shaped hairless depression on head above, longitudinal depression on pronotum, scutellum, longitudinal darker markings on hemelytron, wide stripes on lateral sides of mesothoracic sternum and narrow lateral stripes of metathoracic sternum, four longitudinal stripes on abdomen beneath dark black; legs (except spots on femur, base of tibia, apex of femur, paler markings on tibia), posterior half of each segment of connexivum dark brown; most of head beneath, paler markings on rostral segment, carina on pronotum greyish yellow; base of first antennal segment, apex of femur, markings on femur, base of tibia, irregular markings on tibia, anterior half of each segment of connexivum pale yellow; longitudinal paler stripes and some irregular paler markings on hemelytron greyish; abdomen yellowish brown.

Structure. Head shorter than pronotum, anteocular portion distinctly longer than postocular portion, lower margin of anteocular portion concave upwards, postocular region with two rounded elevation but without tubercle ( Fig. 3 ); first antennal segment shorter than anteocular portion (0.80:1.00), second antennal segment longer than first visible rostral segment (1.00:0.70), third segment smallest, fourth longer than third, relative length of antennal segments: I:II:III:IV= 0.60:1.00:0.13:0.30 ( Fig. 4 ); antennal tubercles divergent; inner antennal processes distinct, straight with rounded apex ( Fig. 3 ); first rostral segment longer than second and third together and reaching middle of eye, second rostral segment shorter than third, thick and narrowed apically, relative length of rostral visible segments: I:II:III= 1.00:0.36:0.50 ( Fig. 4 ); anterior pronotal lobe distinctly shorter than posterior, posterior portion of longitudinal depression on anterior lobe deeper, posterior pronotal lobe sublaterally with four longitudinal carinae, depressed portion on posterior pronotal lobe distinctly wrinkled, lateral angles of posterior pronotal lobe with tubercular processes ( Fig. 5 ); scutellum longer than broad, wider at middle, narrowed and rounded at apex, middle of scutellum longitudinally depressed ( Fig. 6 ); fore tibia not wider than fore femora, hind tibia longer than femora; posterior angle of connexivum protruded ( Figs 1, 2 ); abdomen longer than broad ( Figs 7, 8 ); male genitalia as in Figs 11–14 .

Measurements. [in mm, ♂, holotype]. Body length 12.11; head length 2.01, width across eye 1.31; length of anteocular region 1.11, postocular region 0.90; length of antennae 2.97, lengths of antennal segments I: 0.87, II: 1.45, III: 0.19, and IV: 0.43; rostral length 2.02, length of rostral segments I: 1.09, II: 0.39 and III: 0.53; length of pronotum 2.48; length of anterior pronotal lobe 1.20, posterior pronotal lobe 1.27, width of anterior pronotal lobe 1.51, posterior pronotal lobe 2.35; length of scutellum 0.88, width of scutellum 0.72; length of abdomen 6.37, width of abdomen 3.04; length of forecoxa: 0.53, trochanter: 0.61, femur: 2.43, tibia: 2.37, tarsus: 0.47, claws: 0.07; midcoxa: 0.55, trochanter: 0.72, femur: 2.07, tibia: 2.20, tarsus: 0.57, claw: 0.07; hindcoxa: 0.64, trochanter: 0.75, femur: 3.32, tibia: 4.09, tarsus: 0.60, claw: 0.12.

Type material. Holotype: 1♂, INDIA: West Bengal: Darjeeling District: Rangtong, 13.IV.1978, A.R. Bhaumik and party. Paratypes: 3♂, 1♀, West Bengal: Darjeeling District: Rangtong, 13.IV.1978, A.R. Bhaumik and party; 1♀, West Bengal: Darjeeling District: Kalijhora, 12.XI.1978, A.R. Bhaumik and party.

Habitat. The holotype and paratypes were collected from under bark of a dead standing tree.

Distribution. INDIA: West Bengal.

Etymology. It denotes the district of West Bengal from where the specimens have been collected.

Remarks. This new species, Aulacogenia darjeelingensis sp. nov., is closely related to A. papilla Zhao & Cai from China, by sharing common characters such as anteocular region of head distinctly longer than postocular, lower margin of anteocular concave, first segment of antennae shorter than anteocular, second antennal segment longer than first rostral segment, inner antennal process with rounded apex, posterior pronotal lobe with four longitudinal carinae, middle of scutellum longitudinally depressed and fore tibia not wider than fore femur. However A. darjeelingensis sp. nov. can be easily separated from A. papilla Zhao & Cai by following diagnostic characteristics as in Table 1 .

Figures

FIGURES 1 – 4. Aulacogenia darjeelingensis sp. nov. 1. Dorsal view of male; 2. dorsal view of female; 3. dorsal view of head; 4. ventral view of head. Scale bar = 1 mm.

FIGURES 5 – 8. Aulacogenia darjeelingensis sp. nov. 5. Pronotum; 6. scutellum; 7. abdomen of male, ventral view; 8. abdomen of female, ventral view. Scale bar = 1 mm.

FIGURES 9 – 14. Aulacogenia darjeelingensis sp. nov. 9. Abdominal tip of male, ventral view; 10. abdominal tip of female, ventral view; 11. ventral view of pygophore; 12, lateral view of pygophore; 13. paramere; 14. lateral view of phallus. Scale bar = 1 mm.