1. C. novae-zelandiae Kieffer, 1921

Although originally allocated the name Chironomus novae-zelandiae, such names are no longer acceptable under the Code, and it should now be Chironomus novaezelandiae

In BOLD BIN: BOLD AAJ0168

The identification of this material as C. novae-zelandiae is based on the similarity to the specimens in the type series, plus the broad distribution of the species.

CHIRONOMUS NOVÆ-ZELANDIÆ - n sp.   Male.  Yellowish.  Frontal lobes very small.  Antennae and plumes brown, black scape, twelfth segment very long, four times as long as 2-11 combined, 3-11 very broad.  Metanotum, three shortened bands of mesonotum and mesosternum brownish red and dull.  Halteres white.  Wing hyaline, lobe at right angles, transversal black, cubitus a half longer than the radius, and nearer to the tip of the wing than the discoidal; cross-vein under the transversal.  Legs yellowish, fourth and fifth segments of the tarsae a dark brown, anterior metatarsus a third longer than tibia, its distal third and the second segment setae long, 2-4 gradually shorter, pulvilli large, the two spurs of the posterior tibia short.  Abdomen brown black, hind margin of tergites whitish.  Claspers brown black; terminal parts very long, nearly twice as long as the basal, slightly curved and slightly thinned in their distal half, median part bearing, before the extremity, a row of six rigid bristles, almost twice as long as the width of the segment; superior appendage red, exceeding the basal segment, strongly curved, equally wide to the extremity, which is rounded; inferior appendage twice as long as the superior, exceeding the basal third of the terminal segment, with common long, curved, dorsal hairs; anal point moderately long.  L. 8 m/m.
(i.e. AR about 4; LR about 1.3)
  Female.  Antennae brown, second segment has neck a little longer then wide; 3-5 a neck shorter than the base, the sixth half longer than the fifth.  L. 7 m/m.
New Zealand, 7 male, 1 female.
Translation of Kieffer's original 1921 description

There are 5 males, including the lectotype from Wellington, and two females of the type series, collected by Osten-Sacken, in the DEI near Berlin, Germany.  The specimens are lacking many leg segments, and, in one case, the abdomen.  These specimens were examined in 1997.

AR about 3.23-3.6; Clypeal setae about 22-37.  Thoracic setae could not be clarified.
VR about 1.
Legs:  Anterior tarsi with a beard of dense shorter setae (BR 1.6-4.3) and sparse longer setae (BR about 3-7) i.e. about twice the length of the shorter setae.
Leg segments (relative lengths only):

 
Fe
Ti
Ta1
Ta2
Ta3
Ta4
Ta5
LR
F/T
BR
PI
285
265
377
200
140
-
-
1.34-1.45
0.96-1.09
4.7-7.0
PII
290
275
160
100
-
-
-
0.58-0.60
1.02-1.08
 
PIII
370
390
245
154
-
-
-
0.60-0.69
0.89-1.0
 

Abdominal segments generally with a dark band and a narrow pale posterior stripe.  One specimen (labelled only 'New Zealand') has a narrower dark band and has green on the abdomen as well - since this specimen has only a shorter beard (BR 3.15), it may be a different species.

  Data from other specimens:

Wing length about 4.88 mm; width about 0.96 mm.  AR about 3.2; cephalic tubercles about 15 µm; 15 setae on clypeus.  Palpal segments (2-5 in micron): 60 : 220 : 245 : 372.
Thoracic setae: Acrostichal - not seen; Dorsolateral - 12-13; Prealar - 5-6; Scutellar in roughly two rows, 10 anterior and 12 posterior.
Leg segments (micron):

 
Fe
Ti
Ta1
Ta2
Ta3
Ta4
Ta5
LR
F/T
BR
PI
1435
1290
1790
1060
775
640
295
1.38-1.43
1.12
2.7-3.9
PII
1505
1400
830
525
370
255
178
0.57-0.61
1.06-1.08
 
PIII
1700
1725
1178
728
519
345
203
0.68-0.69
0.99
 

Superior volsella of D(e)-type, of Strenzke (1959); 3 setae centrally on TIX.  Gonostylus reducing markedly about one third from distal end.

Females:
Osten-Sacken specimen - (labelled only 'New Zealand') with AR 0.41-0.42;  leg ratios similar to males.

Other females:
Wing length 4.46 (3.96-4.88) mm, width 0.96-1.40 mm; VR 0.81-0.98, about 3-4 Scf on brachiolum, and about 25 setae in squamal fringe.
Head: Antennal proportions (micron): 181-220 ; 116-138 ; 130-155 : 131-150 : 215-251.  AR 0.38-0.41; A5/A1 1.14-1.22.
Cephalic tubercles about 23-34 µm; palpal segments (Ám) 70 : 64 : 226 : 259 : 387.Clypeal width about 1.6 times the diameter of the antennal pedicel; 41-51 setae.Thoracic setae:  Acrostichal - 13-19; Humeral about 5 linear incl. perhaps 3 small setae, Dorsolateral - 19-30; Prealar - 5-9; Supra alar - 1; Scutellar - anterior row 15-27, posterior row 16-20.
Leg lengths (micron) and proportions:


 
Fe
Ti
Ta1
Ta2
Ta3
Ta4
Ta5
LR
F/T
Ta4/Ti
PI
1467
1320
1860
1027
767
620
327
1.38-1.44
1.11
0.45-0.50
PII
1520
1480
833
493
360
333
207
0.56-0.57
1.00-1.06
 
PIII
1787
1853
1240
760
580
353
233
0.64-0.69
0.94-0.99
 

Abdominal tergites with darkened bands, at anterior of TII to TIV then more extensive.

It is still likely that this is a mixture of at least two species, as there seem to be two types of arm G: one with no apparent nucleolus and with a large subterminal and medial BR (G1) (the latter moved distally in G2), and another with a subterminal nucleolus and often without an obvious BR (G3), or with a BR very close to the nucleolus - but other than the presence or absence of the nucleolus or BR, the sequence appears identical.
MtCOI data suggests a common variable species and a possible second less common form.

DNA analysis:
MtCOI - see sequences in BOLD BIN AAJ0168
MtcytB - GenBank (AF192178.1)

Known Localities

This appears to have been the "thummi-type" studied by Robb (1966).  It is referred to as C. zealandicus Type I by Lentzios & Stocker (1979) and Lentzios et al. (1980), who reported a nucleolus only in arm F.  They received most of their material from Long Point.

Go to Immatures and cytology

See also C. "spilleri",   C. species NZ10 and C. species NZ12.

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Modified: 10 September 2020
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