Procladius (Psilotanypus) bellus (Loew),

Saether, Ole A., 2010, Procladius Skuse from Lake Winnipeg, Manitoba, Canada, with keys to some females and immature stages of the genus (Diptera: Chironomidae), Zootaxa 2726, pp. 34-58: 36-37

publication ID

http://doi.org/ 10.5281/zenodo.200030

persistent identifier

http://treatment.plazi.org/id/03DE87CE-FC70-FFB2-ACBF-FAB1FBF672F5

treatment provided by

Plazi

scientific name

Procladius (Psilotanypus) bellus (Loew)
status

 

Procladius (Psilotanypus) bellus (Loew) 

( Figs 2View FIGURE 2; 3; 12 A, G; 13 A, F, H, K; 14 A, D, I, J)

Tanypus bellus Loew, 1866: 4  .

Procladius bellus (Loew)  , Johannsen 1905: 132. Tanypus pusillus Loew, 1866: 5  .

Procladius adumbratus Johannsen, 1905: 132  .

Prothenthes riparius Malloch, 1915: 389  .

Procladius flavidus Kieffer, 1923: 297  .

Procladius malifero Garrett, 1925: 10  .

Procladius (Psilotanypus) bellus (Loew)  , Sublette 1964: 111; Roback 1971: 162, 19., 1980: 31; Saether 1977: 48.

Material examined. CANADA: Manitoba, Lake Winnipeg, Victoria Beach, 8 males, 9.vii. & 25.vii. 1969; Pine Dock, 20 males, 10.vii. & 31, vii. 1969; 0.5 km off George Island, 1 male, 11.vii. 1969; 3 km off Grand Rapids, 1 male, 13.vii. 1969; 3 km off McCreary Island, 3 males, 15.vii. 1969; Gull Harbor, 16 males, 16.vii. 1969; Grand Rapids Government Wharf, 3 males, 28, vii. 1969; McBeth Harbor, 1 male, 30.vii. 1969; Beaver Point, 12 males, 30.vi. & 19.viii. 1971; 20 Mile Creek, 11 males, 26.viii. & 1.ix. 1971; Old Fishing Dock, 34 males, 24.vi.– 8.ix. 1971; Calders Dock, 2 males, 5.viii. 1971; Hecla Island, 11 males, 27.vii.– 25.viii. 1971; Beaver Creek, 28 males from emergence traps, 4 reared from larvae, 8.vi – 8.viii. 1971; outer buoy of Red River, 2 males reared from larvae, 9.vii. 1969; east of Elk Island, 1 male reared from larva, 10.vii. 1969; 13 km southeast of Pearson Reef, l female reared from larva, 10.vii. 1969; north of outer buoy of Red River, 1 female reared from larva, 24.vii. 1969; South Basin, 86 larvae, 1 pupa, 4.vi – 31.x. 1969; Narrows, 25 larvae, 4.vi – 31.x. 1969; North Basin, 6 larvae, 4.vi – 31.x. 1969.

There was considerable hypopygial variation; particularly in the gonostylus and in the expression of the inner projection of the gonostylus ( Fig. 2View FIGURE 2 B, C). Although the projection is not described or illustrated in Roback (1971: 165, plate 33), it is persistently present in numerous specimens from Lake Winnipeg. However, since there are also a number of intermediate specimens, this projection is just regarded as part of the normal variation.

The female lacks setae on anepisternum II, has 7–22 setae on segment X, curved lobe of gonapophysis VIII ( Saether 1977 fig. 20 C), and about 2–6 sensilla chaetica on each ta 1 of p 2 and p 3.

Pupa (n = 9)

Cephalothorax. Thoracic horn ( Fig. 12View FIGURE 12 A) 313–393, 344 µm long; 60 –96, 76 µm wide; plastron plate diameter 52 –96, 69 µm; apical constriction of horn chamber 26 –52, 32 µm wide; length/width of horn 3.81–5.32, 4.58; width of plastron plate /width of horn 0.66–1.04, 0.88; width of plastron plate/ width of constriction 1.73–2.55, 2.21.

Abdomen. Anal lobe ( Fig. 12View FIGURE 12 G) with 19 –26, 23 well developed spines along outer margin.

Fourth instar larva (n = 10, except when otherwise stated)

Head capsule length 580–724, 650 µm (158) [ 470–540 µm in Moore & Moore (1978)].

Head. Antenna as in Fig. 13View FIGURE 13 A, F. Length of antennal segments 1–5 (µm): 145–163, 155; 14 –24, 20; 4–6, 5.5, 2 –4, 3; 1–2, 1.5. AR 4.16–5.43, 4.81 [4.4–5.4 in Roback (1980), 4.9–6.2 in Moore & Moore (1978)]. Basal antennal segment 28 –32, 30 µm wide; 4.77–5.33, 5.13 times as long as wide; ring organ 0.74–0.81, 0.76 from base; blade 19 –31, 25 µm; accessory blade 15 –20, 18 µm long. Apical style of second segment 6 –10, 8 µm long. Apex of labrum as in Fig. 13View FIGURE 13 H. Mandible 136–164, 147 µm long)[ 105–120 µm in Moore & Moore (1978)], 114–148 µm in Roback (1980)]. Maxilla ( Fig. 14View FIGURE 14 A) with lamelles of galea and palpifer broad and apparently undivided; maxillary palp ( Fig. 14View FIGURE 14 D) 36 –44, 40 µm long; 17 –18, 18 µm wide; 2.00– 2.44, 2.23 times as long as wide. Length of basal antennal segment/length of palp 3.58–4.31, 3.88. Hypopharyngeal pecten ( Fig. 13View FIGURE 13 K) with 6–9, 6.7 (13) teeth.

Abdomen. Claws of posterior parapods with two relatively short and broad claws ( Fig. 14View FIGURE 14 I)

Distribution and ecology. The species is known from all over North America ( Roback 1971: 165) and in all kinds of waters ( Roback 1971: 165, 1974: 358; Oliver et al. 1990: 15; Spies 1999; Epler 2003, 2010; Caldwell 2009).

In Lake Winnipeg the species is less common than the four other dominant species of Procladius  ( Fig. 1View FIGURE 1). The species is much more common in the South Basin and the Narrows than in the north ( Fig. 1View FIGURE 1). Adults were caught from early June to late September ( Fig. 3View FIGURE 3) indicating two or more generations a year.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Procladius

Loc

Procladius (Psilotanypus) bellus (Loew)

Saether, Ole A. 2010
2010
Loc

Procladius (Psilotanypus) bellus

Saether 1977: 48
Roback 1971: 162
Sublette 1964: 111
1964
Loc

Procladius malifero

Garrett 1925: 10
1925
Loc

Procladius flavidus

Kieffer 1923: 297
1923
Loc

Prothenthes riparius

Malloch 1915: 389
1915
Loc

Procladius bellus

Johannsen 1905: 132
Loew 1866: 5
1905
Loc

Procladius adumbratus

Johannsen 1905: 132
1905
Loc

Tanypus bellus

Loew 1866: 4
1866