Pseudodiamesa (s. str.) gorodkovi Makarchenko, 1909

Makarchenko, Eugenyi A., 2022, Redescription of two little-known Palaearctic species of Pseudodiamesa Goetghebuer (Diptera: Chironomidae: Diamesinae), Zootaxa 5092 (5), pp. 596-600 : 596-598

publication ID

https://doi.org/ 10.11646/zootaxa.5092.5.8

publication LSID

lsid:zoobank.org:pub:E8351291-CB4C-43FD-9050-1E3DAE87A29F

DOI

https://doi.org/10.5281/zenodo.5898196

persistent identifier

https://treatment.plazi.org/id/03D587AC-F65B-FFA8-189F-40B6FB1CFB70

treatment provided by

Plazi

scientific name

Pseudodiamesa (s. str.) gorodkovi Makarchenko
status

 

Pseudodiamesa (s. str.) gorodkovi Makarchenko View in CoL

( Figs. 1–5 View FIGURES 1–5 )

Pseudodiamesa (s. str.) gorodkovi Makarchenko, 1983: 1909 View in CoL ; Ashe & O’Connor 2009: 304.

Material examined. Holotype: adult male, Russia, Karachay-Cherkess Republic , Caucasus Mountains, Teberda Nature Reserve, alt. 1300 m above sea level, 17.III.1964, leg. K. Gorodkov. Paratypes: 4 adult males, same data as holotype ; 1 adult male, same data as holotype, except 25.XII.1959, leg. L. Arens.

Adult male (n = 3).

Total length 6.1–7.0 mm. Wing length 5.8–6.0 mm. Total length/wing length 1.0–1.16.

Coloration. Head, thorax, legs, and abdomen dark brown to black; antennae brown to dark brown; wings greyish.

Head. Eyes bare and extended dorsomedially. Temporal setae including 14–16 preoculars, 8–14 verticals and 8–10 postorbitals. Clypeus with 41–48 setae. Antenna with 13 flagellomeres and developed plume, setae of which 525–1689 μm long; pedicel without setae; terminal flagellomere with 1 subapical setae 64–72 μm long; AR 3.96–4.40. Palpomere lengths (in μm): 44–50; 186–193; 294–300; 248–252; 280–290. Palpomere 3 distally with sensilla capitata (diameter 16–20 μm). Palpomeres 1–5 length/head width 1.01–1.11.

Thorax. Antepronotum with 20–22 lateral setae. Acrostichals absent, dorsocentrals 38–43 (in 2 rows in anterior 2/3 and in 3 rows in posterior 1/3), prealars 51–56 (in 2–3 rows), scutellars ca 60–67.

Wing. Length 5.8–6.0 mm; width 1.40–1.44 mm. Membrane without setae. R and R 1 with 9–12 setae, R 4+5 with 2 setae on apex. Costa extension 150–160 μm long. RM length/MCu length 2.0–2.3. Anal lobe developed, outline rounded.

Squama with ca 80–90 setae, 164–197 μm long, in 2 rows. VR 0.90–0.91.

Legs. Spur of fore tibia 136–172 μm long; spurs of mid tibia 96–113 μm and 92–101 μm; of hind tibia 140–143 μm and 76–101 μm long. Hind tibial comb with 12–16 setae. Lengths and proportions of leg segments as in Table 1 View TABLE 1 .

Hypopygium ( Figs. 1–5 View FIGURES 1–5 ). Tergite IX with 16–28 setae on each side, 56–68 μm long. Anal point wide in basal part, tapering to pointed apex, 168–170 μm long ( Figs. 1–3 View FIGURES 1–5 ). Laterosternite IX with 16–22 setae. Gonocoxite 520–525 μm long; basal lobe of small size, rounded, with some long setae at inner part ( Figs. 1, 3, 5 View FIGURES 1–5 ). Gonostylus 358–361 μm long, massive, in dorsal view with large lobe on the outer edge and with small triangular tubercle in the basal part along the inner edge ( Figs. 1–3 View FIGURES 1–5 ); shape in ventral view as in Fig. 4 View FIGURES 1–5 ; apically with small tooth, megaseta absent. HR 1.45–1.63. Transverse sternapodeme 260 μm long and 96–100 μm wide, with short rod-like oral projections, anterior margin slightly concave ( Fig. 5 View FIGURES 1–5 ). Phallapodeme with lateral aedeagal lobe 184–192 μm long, which more wide in basal 1/4 and narrow in distal 3/4, elongated in rounded apex ( Fig. 5 View FIGURES 1–5 ).

Pupa and larva unknown.

Remarks. I include this species in the nivosa group. The original description ( Makarchenko 1983) did not contain data on the shape and structure of the transverse sternapodeme. Namely, these characters are present only in P. (s. str.) gorodkovi and are absent in other representatives of the genus. Also, this species differs from the known members of Pseudodiamesa by a short massive gonostylus with a large lobe along the outer edge and some other features specified in this redescription.

Distribution. Known only from type locality in Teberda Nature Reserve of the North Caucasus.

R

Departamento de Geologia, Universidad de Chile

RM

McGill University, Redpath Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Pseudodiamesa

Loc

Pseudodiamesa (s. str.) gorodkovi Makarchenko

Makarchenko, Eugenyi A. 2022
2022
Loc

Pseudodiamesa (s. str.) gorodkovi

Ashe, P. & O'Connor, J. P. 2009: 304
Makarchenko, E. A. 1983: 1909
1983
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