Chaetocladius yavorskayae Makarchenko et Makarchenko

Makarchenko, Eugenyi A., Makarchenko, Marina A. & Semenchenko, Alexander A., 2017, New or little-known species of Chaetocladius s. str. Kieffer, 1911 (Diptera: Chironomidae: Orthocladiinae) from the Amur River basin (Russian Far East), Zootaxa 4247 (3), pp. 313-330 : 323-327

publication ID

https://doi.org/10.11646/zootaxa.4247.3.5

publication LSID

lsid:zoobank.org:pub:DB177717-01CA-4575-93BC-06D0FAEEF769

DOI

https://doi.org/10.5281/zenodo.6029363

persistent identifier

https://treatment.plazi.org/id/7C0E87FE-FF85-FFE4-FF48-FBE7FC46FD0B

treatment provided by

Plazi

scientific name

Chaetocladius yavorskayae Makarchenko et Makarchenko
status

sp. nov.

Chaetocladius yavorskayae Makarchenko et Makarchenko , sp. nov.

( Figs. 29–33 View FIGURES 29 – 33 , 42–44 View FIGURES 40 – 44 )

Chaetocladius sp.1 Makarchenko et al. 2014: 424.

Material. Holotype: adult male, Russian Far East, Jewish Autonomous Region, Obluchie District, Lopatinskyi Spring of Bidzhan River basin (Amur River basin), N 48°37' 810'', E 131°39' 114'', 31.III. 2015, leg. E. Makarchenko GoogleMaps . Paratypes: 1 mature pupa of male, the same data as holotype, 31.III. 2015, leg. E. Makarchenko GoogleMaps ; 3 males, the same data as holotype except, Fedotkin Spring of Bidzhan River basin, N 48°38' 409'', E 131°37' 217'', 6. IV. 2014, leg. E. Makarchenko GoogleMaps ; 2 males, the same data as holotype except, Kolgaevskiy Spring of Bidzhan River basin, N 48°38' 522'', E 131°54' 788'', 6. IV. 2014, leg. E. Makarchenko GoogleMaps .

Adult male (n=3). Total length 3.2–3.7 mm. Wing length 2.32–2.56 mm. Total length/wing length 1.38–1.45. Colouration brown to dark brown.

continued.

Head. Eyes bare, without dorsomedian prolongations. Temporal setae include (from one side) 7–8 verticals and 5–6 postorbitals. Clypeus with 6–8 setae. Antenna with 13 flagellomeres and well developed plume; AR 1.91–2.38. Lengths of palpomeres 2–5 (in µm): 48–52: 144–168: 128–176: 252–296. Third palpomere in distal part with 8– 10 sensilla clavata.

Thorax. Brown. Antepronotum with 5–6 lateral setae. Acrostichals 15–21, beginning close to antepronotum; dorsocentrals 11–16; prealars 3–4; scutellum with 7–8 setae in 1 row.

Wing. Greyish, with more dark veins and good visible microtrichia. Halteres brownish-yellow. R with 10–11 setae, R1 and R4+5 without setae. Costa extension 56–80 µm. Apex of R4+5 distal of apex M3+4. Cu1 curved in apical part. Anal lobe developed, rectangular-rounded. Squama with 9–13 setae.

Legs. Spur of fore tibia 76–80 µm. Spurs of mid tibia 24–32 µm and 28–32 µm long, of hind tibia 60–68 µm and 16–28 µm long;ta1 and ta2 of mid leg 2 pseudospurs, ta3 with 1–2 pseudospurs; ta1–ta3 of hind leg with 2 pseudospurs. Hind tibial comb with 15–19 setae. Pulvilli small. Length (in µm) and proportions of leg segments as in Table 4 View TABLE 4 .

Hypopygium ( Figs. 29–33 View FIGURES 29 – 33 , 42 View FIGURES 40 – 44 ). Tergite IX without anal point, trapezoidal,densely covered with microtrichia, its free edge as it is curled inwards, in inner side and on the edge with middle and long 11–19 setae ( Fig. 31 View FIGURES 29 – 33 ). Laterosternite IX with 8–9 setae on each side. Transverse sternapodeme rounded, 108–112 µm long, with weak oral projections. Virga 40–48 µm long, consists of 2–3 colorless setae. Gonocoxite 260 µm long; inferior volsella as a rounded projection located in distal half of gonocoxite, covered with microtrichia and setae ( Figs. 29–30 View FIGURES 29 – 33 ). Gonostylus bifurcate, inner branch 104–108 µm long, with megaseta 14–20 µm long ( Figs. 29–30, 32 View FIGURES 29 – 33 , 42 View FIGURES 40 – 44 ).

Pupa (n=1). Cephalothorax was destroyed and we had chance to study only abdomen.

Abdomen. Tergite I without shagreen. Tergites II–VIII uniformly covered with shagreen spinules of one size and with larger long spinules in 2–3 rows along posterior edge, behind long spinules on tergites III–VII located small spinules tops of which are directed forward ( Fig. 44 View FIGURES 40 – 44 ). Sternites I–III, VII–VIII without shagreen of spinules; sternite IV with row of small spinules near posterior edge; sternites V–VI with small spinules on surface. Segment I with 2 pairs of hair-like lateral setae. Segments II–VII with 2 pairs of seta-like lateral setae on tubercles and 2 pairs of hair-like setae. Segment VIII with 3 hair-like setae. Anal lobe 284 µm long, with 3 spine-like macrosetae; anterior macroseta (AM1) 80 µm long and 8 µm wide; middle macroseta (AM2) 76–80 µm long and 6 µm wide; posterior macroseta (AM3) 116 µm long and 8 µm wide. Distance from base of anal lobe to AM1 0.49 of anal lobe length. Distance between AM1 and AM2 68 µm; between AM2 and AM3 20 µm. Location of anal megasetae illustrated in Figs. 33 View FIGURES 29 – 33 , 43 View FIGURES 40 – 44 . Male genital sac extending 32–36 µm beyond anal lobe.

Diagnostic characters. A new species is separate from all known species of Chaetocladius s. str. by absence of anal point and bifurcate gonostylus. See also the results of barcoding ( Fig. 45 View FIGURE 45 ) and key.

Etymology. The species is named in honour of Dr. N.M. Yavorskaya from the Institute of Water and Ecological Problems FEB RAS (Khabarovsk), the hydrobiologist who collected the more specimens of chironomids in the Amur River basin for describing of a new species.

TABLE 4. Lengths (in µm) and proportions of leg segments of Chaetocladius yavorskayae sp. nov., male (n = 3).

  fe ti ta1 ta2 ta3 ta4 ta5
P1 944–1024 1088–1200 720–752 304–400 272–288 192 128–144
P2 976–1056 992–1088 448–512 280–288 192–208 128–144 128
P3 1088–1168 1232–1344 720–768 384–416 320–336 176–192 144
RAS

Union of Burma Applied Research Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Chaetocladius

Loc

Chaetocladius yavorskayae Makarchenko et Makarchenko

Makarchenko, Eugenyi A., Makarchenko, Marina A. & Semenchenko, Alexander A. 2017
2017
Loc

Chaetocladius

Makarchenko 2014: 424
2014