Chaetocladius ligni Cranston et Oliver

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 : 318-320

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.6029355

persistent identifier

https://treatment.plazi.org/id/7C0E87FE-FF8A-FFED-FF48-F984FAE4FA2D

treatment provided by

Plazi

scientific name

Chaetocladius ligni Cranston et Oliver
status

 

Chaetocladius ligni Cranston et Oliver

( Figs. 16–17 View FIGURES 14 – 18 )

Chaetocladius ligni Cranston et Oliver, 1988: 144 , Figs. 1–13 View FIGURES 1 – 13 ; Makarchenko & Makarchenko 2011: 111; Makarchenko et al. 2014: 424; Ashe & O’Connor 2012: 171.

Remarks. This species was described as adult male, female, pupa and larva from North America ( Cranston & Oliver 1988), and later was recorded by us for the Russian Far East ( Makarchenko & Makarchenko 2011b). The present revision of Chaetocladius s. str. from the Amur River basin indicates differences in the structure of the males from the Nearctic and East Palearctic regions. In this regard, we have found it appropriate to redescribe the adult male on the basis of our material and to present the results of DNA analysis that will allow a detailed comparing the known populations of C. ligni in the future.

Material. 3 males, Russian Far East, Jewish Autonomous Region, Obluchie District, Fedotkin Spring of Bidzhan River basin (Amur River basin), N 48°38' 409'', E 131°37' 217'', 6. IV. 2014, leg. E. Makarchenko GoogleMaps .

Adult male (n=2–3). Total length 3.0– 3.6 mm. Wing length 2.16–2.48 mm. Total length/wing length 1.33– 1.45. Colouration brown.

Head. Eyes bare, with rounded short dorsomedian. Temporal setae include (from one side) 5–6 verticals and 5– 7 postorbitals. Clypeus with 6–14 setae. Antenna with 13 flagellomeres and well developed plume; flagellomere 13 subapical with seta; AR 0.94–1.06. Lengths of palpomeres 2–5 (in µm): 52: 160: 148: 260. Third palpomere in subapical part with 7 sensilla clavata.

Thorax. Brown, with dark brown stripes; humeral pit with light spot. Antepronotum with 9–11 lateral setae. Acrostichals 16–19; dorsocentrals 11–21 (in 1–2 rows); prealars 4–7; scutellum with 7–8 setae in 1 row.

Wing. Halteres light. R with 20–21 setae, R1 with 3–8 setae, R4+5 with 20–25 setae. Costa extension ca 60 µm. Apex of R4+5 distal of apex M3+4. Cu1 curved in apical quarter. Anal lobe developed, wide rectangular-rounded. Squama with 7–8 setae.

Legs. Spur of fore tibia 80 µm. Spurs of mid tibia 24–28 µm long, of hind tibia 84 µm and 20 µm long; ta1and ta2 of mid and hind legs with 2 pseudospurs. Hind tibial comb with 13–15 setae. Length (in µm) and proportions of leg segments as in Table 2 View TABLE 2 .

continued.

Hypopygium ( Figs. 16–17 View FIGURES 14 – 18 ). Tergite IX with 18–21 long setae and long triangular anal point 56–64 µm long (n=2) ( Fig. 16 View FIGURES 14 – 18 ) and 92 µm long (n=1) ( Fig. 17 View FIGURES 14 – 18 ). Anal point in basal 1/3–1/4 with microtrichia, the remaining part naked. Laterosternite IX with 6–7 setae on each side. Transverse sternapodeme rounded, 92 µm long, with weak oral projections. Virga 56 µm long, consists of some setae. Gonocoxite 200–215 µm long; inferior volsella as in Figs. 16–17 View FIGURES 14 – 18 . Gonostylus 84–88 µm long, with rounded preapical crista dorsalis, megaseta 10–12 µm long.

Pupa and larva are described by Cranston & Oliver (1988), but absent in our material.

Distribution. C. ligni is known from North America ( U.S.A., Oregon) and the Russian Far East.

TABLE 2. Lengths (in µm) and proportions of leg segments of Chaetocladius ligni Cranston et Oliver, male (n = 2).

  fe ti ta1 ta2 ta3 ta4 ta5
P1 928–1024 1024–1184 768–896 384–416 272–304 192–224 128–144
P2 912–1056 944–1104 448–544 272–304 208–224 144–160 112–144
P3 1040–1168 1152–1344 720–832 352–400 304–320 192–208 144–160
DNA

Department of Natural Resources, Environment, The Arts and Sport

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Chaetocladius

Loc

Chaetocladius ligni Cranston et Oliver

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

Chaetocladius ligni Cranston et Oliver, 1988 : 144

Makarchenko 2014: 424
Cranston 1988: 144
1988