Table 1. Morphometric data for Barilius profundus sp. nov. (n=13)

Holotype MUMF 27001

Range*

Mean

Standard length (mm)

71.1

50.9–71.1

In % of standard length

Body depth at dorsal fin origin

32.0

32.0–37.3

34.6

2.5

Head length

18.6

18.6–21.0

19.8

1.0

Predorsal length

59.9

58.9–64.0

61.4

3.9

Prepelvic length

51.6

45.8–62.3

54.0

4.5

Pre-anus length

67.8

67.8–74.6

71.2

4.6

Preanal length

70.6

70.6–76.3

73.4

4.6

Prepectoral length

28.1

26.9–30.2

28.5

1.9

Pectoral fin length

20.8

20.8–24.5

22.6

1.2

Pelvic fin length

13.9

13.9–17.6

15.7

0.8

Dorsal fin height

21.6

21.6–25.7

23.6

1.4

Dorsal fin base length

16.1

14.9–17.5

16.2

1.3

Anal fin length

16.6

16.6–20.4

18.5

1.0

Caudal peduncle length

14.0

11.1–15.4

13.2

1.0

Caudal peduncle depth

11.6

11.4–15.6

13.5

0.9

In % of head length

Snout length

43.1

34.9–43.1

39.0

0.6

Eye diameter

40.1

38.3–42.9

40.6

0.3

Interorbital distance

50.0

45.2–53.3

49.2

0.6

Maximum head width

67.4

58.5–79.2

68.8

1.3

Head height at supraoccipital

118.9

111.6–136.8

124.2

1.7

Counts

D rays

ii, 7½

P rays

i, 11

V rays

i, 8

A rays

ii, 10½

C rays

i, 9+8, i

L.l

32+2

30-32+2-3

L.tr.

½/7/1/2½

Predorsal scales

17–18

Circumpeduncular scales

Transverse bands on body

7–10

L.l - lateral line longitudinal scales; L.tr. - lateral transverse scales; * - measurements of all individuals provided in Appendix 1.

Keys to species of the genus Barilius of northeastern India

Barbels present ............................................................................................................................................... 2

Barbels absent ..................................................................................................................................... B. barna

Barbels 1 pair ......................................................................................................................................... B. tileo

Barbels 2 pair .................................................................................................................................................. 3

Scales with blue black spot, predorsal scales 18-20 .................................................................... B. bendelisis

Scales without blue black spot ........................................................................................................................ 4

Predorsal scales 15–18 .................................................................................................................................. 5

Predorsal scales 20–26 .................................................................................................................................. 6

Lateral line scales 32–35, depth of body 32.0–37.3% SL ............................................. B. profundus sp. nov.

Lateral line scales 38, depth of body 24.6–29.2 % SL ............................................................... B. chatricensis

Mandibular knob not distinct, dorsal fin with a transverse blue black band ............................... B. dogarsinghi

Mandibular knob distinct, dorsal fin without transverse band ......................................................................... 7

Lateral line scales 59–70 ................................................................................................................... B. shacra

Lateral line scales 42–45 ................................................................................................................................ 8

Pectoral fin as long as head, body with 14–15 bars ............................................................................ B. barila

Pectoral fin shorter than head, body with 10–16 bars ..................................................................................... 9

Bars width: one-third of inter-bar width ................................................................................................ B. vagra

Bars and inter-bar with equal width ............................................................................................................... 10

Caudal lobes equal ............................................................................................................................ B. ngawa

Caudal lobes unequal, lower lobe longer than the upper ............................................................ B. lairokensis

Appendix 1. Biometric data of Barilius profundus sp. nov.

Measurements

Holotype

Paratypes (N=12)

MUMF

27001

MUMF 27002

MUMF 27003

MUMF 27004

MUMF 27005

MUMF 27021

MUMF 27022

MUMF 27023

MUMF 27024

MUMF 27025

MUMF 27026

MUMF 27027

MUMF 27028

Standard

length

71.1

67.7

55.2

61.5

54.5

69.9

64.1

60.9

64.6

58.9

69.8

50.9

55.2

Body depth

at dorsal fin

origin

22.8

23.5

20.3

22.0

18.6

23.9

23.4

22.4

24.1

21.3

25.6

17.1

18.5

Head length

13.2

12.6

11.2

12.6

11.4

13.5

12.7

12.2

12.4

11.5

13.3

10.7

10.6

Predorsal

length

43.2

39.9

34.6

38.7

32.5

42.0

39.5

36.3

39.9

37.7

42.1

30.9

33.1

Prepelvic

length

37.2

37.1

30.8

38.3

29.5

38.0

36.7

35.0

36.5

33.3

37.9

23.3

30.4

Pre-anus

length

48.2

48.1

40.5

44.9

37.2

50.3

44.8

44.5

48.2

42.6

50.6

38.3

41.0

Preanal

length

50.2

50.9

40.7

46.9

40.0

51.1

48.5

45.0

48.9

43.8

50.6

38.3

41.0

Prepectoral

length

20.3

16.0

17.5

15.4

18.8

18.5

18.4

18.1

17.0

20.4

15.1

15.6

Pectoral fin

length

14.8

14.6

13.1

15.1

12.2

15.2

14.9

14.4

14.1

13.2

15.2

11.9

12.2

Pelvic fin

length

9.9

10.0

9.7

9.6

8.7

10.9

9.9

10.1

10.2

9.1

10.9

8.5

8.6

Dorsal fin

height

15.4

15.0

12.9

14.8

12.4

16.3

15.0

14.9

15.3

14.7

16.8

13.1

12.4

Dorsal fin

base length

11.6

10.5

8.4

10.0

8.8

10.7

11.0

10.0

11.1

10.3

12.1

7.6

8.7

Anal fin length

11.8

11.7

10.1

11.4

10.6

12.3

12.0

11.4

10.8

13.8

10.4

10.2

Caudal

peduncle length

10.1

7.5

6.5

6.9

8.4

7.9

8.6

8.0

8.1

9.8

7.5

7.3

Caudal peduncle depth

8.4

8.9

6.6

7.0

6.7

8.3

7.6

8.1

7.4

8.9

6.1

6.6

Snout length

5.7

4.7

4.5

4.4

4.3

5.4

5.0

4.7

5.5

3.8

4.1

Eye diameter

5.3

5.0

4.7

5.0

4.9

5.3

5.1

4.7

5.2

4.9

5.1

4.6

4.3

Interorbital distance

6.6

6.4

5.6

5.7

5.4

7.1

6.3

6.1

5.9

7.1

5.1

5.4

Max. Head

width

8.9

8.3

6.6

8.9

7.6

10.7

9.2

8.4

9.9

7.4

10.2

6.7

6.9

Head height at supraoccipital

15.7

15.5

12.5

15.1

12.8

16.5

16.2

14.5

15.7

14.1

18.2

12.4

12.8

Counts

ii, 7½

i, 11

i, 8

ii, 10½

i, 9+8, i

L. l.

32+2

31+3

30+3

32+3

30+3

32+2

31+2

31+3

32+3

31+3

30+3

L.tr.

½/7/1/

½/7/1

/½

½/7/1/

½/7/1

/½

½/7/1/

½/7/1/ ½

Predorsal scales

Circumpedun-cular scales

Dark blue bars on body