A new species of Choroterpes Eaton, 1881 (Ephemeroptera: Leptophlebiidae) from the River Cauvery, Karnataka, India Author Muthukatturaja, Marimuthu Department of Zoology, Nadar Mahajana Sangam S. Vellaichamy Nadar College, Nagamalai, Madurai- 625019, Tamil Nadu, India. & Department of Zoology, Thiagarajar College, Madurai- 625009, Tamil Nadu, India. Author Balasubramanian, Chellaiah 0000-0001-8563-1677 Department of Zoology, Thiagarajar College, Madurai- 625009, Tamil Nadu, India. ulab62@yahoo.com Author Selvakumar, Chellappa 0000-0002-4296-5682 Department of Zoology, The Madura College, Madurai- 625011, Tamil Nadu, India. selvaaa06@gmail.com Author Murali, Palraju 0009-0008-1551-4860 Department of Zoology, Nadar Mahajana Sangam S. Vellaichamy Nadar College, Nagamalai, Madurai- 625019, Tamil Nadu, India. iniamurali76@gmail.com text Zootaxa 2025 2025-03-20 5609 2 151 173 https://doi.org/10.11646/zootaxa.5609.2.1 journal article 309260 10.11646/zootaxa.5609.2.1 80f8f3b4-a1a4-421c-8541-3e8a6ffdc245 1175-5326 15214892 5F701F77-90CD-49A1-86CB-20D1102A8E12

TABLE 3. Comparison of male imaginal characters of known species of Indian Euthraulus except Choroterpes (E.) sp. «Mumbai».

Species	Hind wing	Abdominal terga	Abdominal sterna	1 st segment of gonostylus	Penes
......continued on the next page
C. (E.) alagarensis	costal projection blunt	mostly brown, with smaller	ochre, with pair of small	inner-apical angle right,	narrowed toward apex;
		ochre areas	brownish maculae laterally	with length equal to width	distad of gonopores short;
					apices rounded, without
					denticles
C. (E.) angustifolius	costal projection blunt	usually mostly ochre with	Ochre	inner-apical angle right,	widest in proximal part;
		brown maculae laterally,		with length equal to width	distad of gonopores
		rarely with more extensive			narrowed toward apex,
		brown maculation			about 1/2 of length from
					proximal constriction to
					apex; apices smooth
C. (E.) armillatus	costal projection blunt	mostly brown, with smaller	Ochre	inner-apical angle right,	gradually narrowed toward
		ochre areas		with length equal to width	apex; distad of gonopores
					short; apices rounded,
					without denticles
C. (E.) atelobranchis	costal projection blunt	mostly dull brown	ochre	inner-apical angle blunt,	proximal parts nearly
				widest at base; length	parallel-sided, distally
				slightly exceeds width	sharply narrowed; apices
					rounded, with denticles
C. (E.) kanagae sp. nov.	costal projection acute	terga I translucent, posterior	sternum I translucent;	slender, apically narrow	slender, little longer than
		margin with a black	sterna II–IX with a lateral	without inner-apical angle;	½ of gonostylus; posterior
		marking medially; anterior	brownish marking	median of inner margin with	margin of penal plate
		½ of tergum II translucent,		a few spines	broadly round with sparse
		posterior ½ with blackish			minute barbs on the surface
		brown marking; terga
		III–VIII with a distinct
		W-shaped blackish brown
		marking, remaining area
		yellow; blackish brown
		marking on tergum IX fused
C. (E.) latus	costal projection blunt	tergum I brown; terga II–IX	ochre, with pair of more or	inner-apical angle right,	relatively wide, widest at
		with contrasting pattern of	less expressed, oblique, dark with length equal to width		middle; distad of gonopores
		dark brown and light ochre	brown maculae laterally		shorter than 1/2 of length
		areas			from proximal constriction
					to apex; apices rounded,
					without denticles
C. (E.) nambiyarensis	costal projection blunt	mostly brown, with smaller	ochre, with pair of small	inner-apical angle right,	widest in proximal part;
		ochre areas	brownish maculae laterally	with length equal to width	distad of gonopores
					narrowed toward apex,
					about half of length from
					proximal constriction to
					apex; apices smooth
C. (E.) nandini	costal projection blunt	tergum III–VII in median	Ochre	inner-apical angle right,	widest in proximal part;
		part mostly ochre, laterally		with length equal to width	distad of gonopores less
		and posteriorly mostly			than half of length from
		brown; more anterior and			proximal constriction to
		more posterior terga mostly			apex; apices smooth
		brown
C. (E.) parvulus	costal projection blunt	tergum II–VII scarcely	pale	broad and rounded	penes simple, without
		translucent, tergum IX–X			appendages, skittle-shaped,
		pitch brown			contiguous at the base,
					separated apically
C. (E.) unicolor	costal projection blunt	mostly dull brown, with	ochre, with pair of small	narrowed at base, with	narrow, in proximal part
		smaller ochre areas	brownish maculae laterally	length equal to width, inner-	parallel-sided; distad
				apical angle right	of gonopores sharply
					narrowed, shorter than 1/2
					of length from proximal
					constriction to apex; apices
					with very small denticles