Harnischia bulbosa, Mukherjee & Hazra, 2023

Mukherjee, Bindarika & Hazra, Niladri, 2023, Taxonomic studies on Harnischia complex from India (Diptera: Chironomidae), Zootaxa 5278 (2), pp. 239-263 : 254-256

Harnischia bulbosa sp.n.

GenBank accession number. OQ400990

urn:lsid:zoobank.org:act:2E308C20-6D6E-4FB2-B3D5-323DD48FD0F0

Material examined. Holotype male, labelled ‘ Holotype Harnischia bulbosa sp. n., India, West Bengal, Purba Barddhaman [23.2393° N, 87.8512° E], 04.ii.2020, Coll. N. Hazra’ . Paratype 1 male, labelled ‘ Paratype Harnischia bulbosa sp.n., India, West Bengal, Purba Barddhaman [23.1840° N, 88.0302° E], 14.xi.2022, Coll. Sk. Mohim Ali’ .

Diagnosis. Presence of spoon shaped anal point and long gonostylus are the segregating characters of this new species.

Etymology. The name ‘ bulbosa ’, a Latin word, refers to bulbous apex of the anal point.

Male (n=3). Total length 2.7–2.85, 2.775 mm. Wing length 1.4–1.43, 1.415 mm. Costal length 1.30–1.35, 1.325 mm. Antennal length 0.70–0.75, 0.725 mm.

Colouration. Thorax, leg and abdomen yellowish brown.

Head. Head width 400–410, 405 µm. Temporal setae 5–7 (IV 0, OV 2, Po 3–5). Clypeal setae 12–14. Frontal tubercles absent. Eyes bare with dorsomedial extension of 138–150, 144 µm. AR 1.65–1.68, 1.66; ultimate flagellomere 470–480, 475 µm long. Palpomere lengths (I–V) (µm): 34.5: 25–30, 27.5: 62: 87.5: 131. CA 0.53– 0.54, 0.535.

Thorax. Scutal tubercle absent. Ac 11, Dc 7, Pa 3, Scts 2. Wing ( Fig. 5A ). VR 1.12–1.14, 1.13. R 1 with 10 setae, R 4+5 bare. Brachiolum with 1 seta. Squama with 3–4 fringed setae. FCu distal to RM. Anal lobe moderately developed. Legs. Fore tibia with 2 setae. Mid legs with 2 tibial spurs; 13.5 µm and 16 µm long with 24–26 lateral teeth. Hind leg with 2 tibial spurs; 11.5 µm and 23 µm long with 36–40 teeth. Lengths and proportions of leg segments shown in table V .

Hypopygium ( Figs. 5B–C ). Anal tergite band V shaped. Anal point more or less spoon-shaped, slightly expanded sub-apically with blunt apex, 32–39, 35.5 µm long with a median ridge like structure and small lobe-like appearance on each side of the anal point. Anal point with 2 lateral setae on each side. Apical anal tergite with 5 setae. Laterosternite IX with 4 setae. Longitudinal and transverse sternapodeme 65–69, 67 µm and 22–25, 23.5 µm long respectively. Superior and inferior volsellae greatly reduced. Gonocoxite 92–96.5, 94.25 µm long. Gonostylus 131 µm long. HR 0.70–0.74. HV 2.96–3.09.

Distribution. India, West Bengal.

Remarks. Absence of frontal tubercles and attenuated gonostylus from the junction with gonocoxite and presence of vestigial superior and inferior volsellae specify the positioning of new species into the genus Harnischia Kieffer. The new species is closely related to H. incidata ( Townes, 1945) in having more or less long gonostylus. However, the presence of spoon-shaped anal point in the new species while apically pointed anal point of H. incidata can differentiate them.

Figures

FIGURE 5. Adult male Harnischia bulbosa sp. n. A. Wing, B. Hypopygium, C. Hypopygium, scale 0.01 mm.

Tables

TABLE V. Lengths (µm) and proportions of legs in Harnischia bulbosa sp. n.

	Fe	Ti	Ta1	Ta2	Ta3
P1	500	350	–	–	–
P 2	440–475, 457.5	360–400, 380	225	150	125
P3	575	550	375	250	200
Continued.
	Ta4	Ta 5	LR	BV	SV
P 1	–	–	–	–	–
P2	100	75	0.56–0.62, 0.59	2.28–2.44, 2.36	3.55–3.88, 3.71
P3	125	100	0.68	2.22	3