Chironomus ramosus Chaudhuri et al. 1992

Incorrect identification: C. ramosus sensu Laviad-Shirit et al., 2020 (= C. flaviplumus Ty. B - Martin 2022).

This species has been recorded as C. sp.PK7 in previous versions of this work.

Original description:

Adult

Male:
Body 5.77 (5.62-5.89) mm.  Wing length 2.33 (2.27-2.40), wing width 0.72 (0.70-0.76)  VR 1.01 (1.00-1.03).
Head: AR 3.86 (3.72-3.94).  Frontal tubercles small; ratio of palp segments: 14 : 11 :47 : 48 : 66.  Clypeal setae 20 (18-20).
Thorax yellow, postnotum pale brown; 2 antipronotal setae.  Mesonotum with 4 brown vittae; fore tibial scale with 4 long setae; tarsomeres of foreleg dark brown, Ta1-3 of mid and hind legs brown at apex, Ta4 & 5 brown.
Leg proportions and ratios (units):
Leg pale; lengths (micron) and proportions as follows:

Male	Fe	Ti	Ta1	Ta2	Ta3	Ta4	Ta5	LR	F/T	BR
PI	30	29	43	21	18	15	7	1.48	1.03	no beard
PII	31	29	18	10	7	4	3.5	0.62	1.07	-
PIII	38	35	25	14	11	6	4	0.72	1.09	-

Abdomen: Greenish yellow, tergites II-VI with brown oval spot medially; VII & VIII with broad brown patch.  

Adult male of C. ramosus (Chaudhuri, Das and Sublette 1992)

Curved anal point figured as tapering to end, beak-like superior volsella (as in C. samoensis, C. flaviplumus, etc.), S-type, closest to Fig. a of Strenzke (1959); setae of inferior volsella finely branched.  Gonostylus moderately swollen, narrowing gently over posterior half to third.

Female:
Body 4.68 (4.53-5.12) mm.  Wing length 2.59 (2.49-2.66), wing width 0.88 (0.82-0.95).
Antenna 5 segmented, relative lengths 10 : 7.5 : 7 : 6.5 : 12.  AR 0.38, A5/A1 about 1.2.

Female genitalia of C. ramosus (Chaudhuri, Das and Sublette 1992)

TX shown as long, curved, but inner region with setae not shown; other specimens show it is about 1.67x longer than greatest width, with 14 setae; Cercus with short dorsal margin, then curved around to ventral base; no obvious basal bulge.

Found: Type locality - Satgachhia, West Bengal, INDIA.
Other localities:
            India - Hooghly, West Bengal; Pune; Cachar hills, Assam.

Larva, pupa and adult described by Chaudhuri, Das & Sublette (1992).  Chromosomes described by Nath & Godbole (1997).  In their map, chromosome I is comprised of arms D and C, chromosome II of arms F and B; chromosome III of arms A and E, and chromosome IV is arm G.  As noted, the nucleolus in the map is at 11B in arm B, but in other specimens, the nucleolus is in arm F at 10D.  It appears that the stock was subsequently replaced by specimens of C. flaviplumus Ty. B.  Since the available specimens have all come from a laboratory stock, it is not clear what the situation is in natural populations (see C. ramosus immatures)
Cytologically close to C. flaviplumus Type B and C. incertipenis.