Table 3 in A NEW SPECIES IN THE RHEOCRICOTOPUS (R.) EFFUSUS GROUP FROM CANADA WITH A REVIEW OF THE NEARCTIC SPECIES OF RHEOCRICOTOPUS AND PARAMETRIOCNEMUS (CHIRONOMIDAE: ORTHOCLADIINAE) Abstract

Table 3. Comparison of some members of Rheocricotopus (R.) effusus group’s adult male. Modified from Saether and Schnell (1988). Ac = Acrostichals, AnP = Anal Point; CD = Crista Dorsalis, Gs = Gonostyle, HP = Humeral Pit; IVo = Inferior Volsella; SVo = Superior Volsella, L = Lengths in μm.
SpeciesARNo. DcNo. AcHPLR 1AnP LAnP setaeHRStern- apodemeSVoIVoGsR. unidentatus1.10–1.3618–2230–36Large ellipsoid0.7141–608–122.42–2.50Arched upwardTooth-like caudomedian projectionLarge, simple with pointed apexCurved evenlyR. effusus0.99–1.339–1618–26Large ellipsoid0.70–0.74<755–13—Arched upwardTooth-like caudomedian projectionLarge, simple with pointed apexCurved evenly with low and long CDR. effusoides1.39–1.6912–1614–21Large ellipsoid0.64–0.6775-9815–121.92–2.07Arched upwardTooth-like caudomedian projectionLarge, simple with slightly hooked apexCurved evenly with low and long CDR. pauciseta0.6–0.835–712–17small0.62–0.7436–406–82.61–2.69Arched upwardTriangularDivided into 2 small lobes with dorsal one nakedPlump, broad at apex, without CDR. reduncus0.83–1.177–123–9small0.62–0.67386–111.82–2.00Narrow and arched upwardMainly bent, short digitiform caudomedian projection, caudally appearing closely parallel to one another or overlapping each otherSmall, simple with blunt tip. Evenly tapered at the apexLong, curved evenly with very low CD that may appear absentR. reduncusoides0.72–0.797–94–5small0.60–0.6656–8912–191.50–1.80Broad horizontal bandEvenly curved, long digitiform caudomedian projections medially projected and opposing each otherSmall, simple, slightly dilated at the apexLong, slightly bent distally, CD developed, long and low