Table 4 Counts and measurements of Economidichthys triangularis (Weiler 1943) and Pomatischistus sp. (after Carnevale et al. 2006) and comparison with the extant Economidichthys pygmaeus (Holly 1929), Hyrcanogobius bergi Iljin 1928 and the aggregated extant genera Knipowitschia and Pomatoschistus (extant data after Miller 2004 and Mestermann and Zander 1984)

SL (mm)

23.5

22.3

<43

<37

<50

<65

Otolith in situ

Imprint

Yes

Meristics

 Precaudal vertebrae

11

12

12–13

?

11–12

11–13

 Total vertebrae

29

32

29–31

?

30–33

30–33

 D 1

VII

VI

VI (V–VI)

VI (VI–VII)

VI (V–VII)

VI (V–VII)

 D 2

I + 13

I + 11

I + 8–11

I + 7–9

I + 6–9

I + 6–12

 A

I + 13

I + 10 or 11

I + 7–10

I + 7–9

I + 7–10

I + 6–12

 Pectoral

15–16

nm

13–19

15–18

15–19

15–21

 D1 last ray between NS

NS6–NS7

NS6–NS7

NS6–NS7

NS6–NS7

NS6–NS7

 empty neural spines

NS7–NS10

NS7–NS9 to NS7–NS10

NS7–NS9

NS8–NS19 to NS7–NS10

NS7–NS10

 D2 first PT between NS

NS10–NS11

NS9–NS10 to NS10–NS11

NS9–NS10

NS9–NS10 to NS10–NS11

NS10–NS11

 Caudal principle

16

15

15–16

15

16–20

 Dorsal pterygiophore formula

3-12310001

3-1…

3-1221001

3-1221001

3-1221001 to 3-12201001

3-122100(0)1

 Anal PT1 opposite to

D2/1

D2/3

D2/3

D2/3

D2/3

 Postmaxillary process on PMX

Absent

Absent

Absent

Absent

absent

 EPU

nv

1

1

1

1

1

 AP

1 or 2

?

?

2

2

 SOP anterior-ventral shape

Hook-like

Hook-like

Hook-like

Hook-like

Hook-like

Scales

 On head

Naked

Naked

Naked

Naked

Naked

 On body

Predorsal and anterior back naked

Back and abdomen naked

Back and abdomen naked

Predorsal and anterior back naked

Predorsal naked, occ. scaled

 Type

Mostly cycloid

Ctenoid

Ctenoid

Ctenoid

Ctenoid

 Scales along lateral line

~35

30–38

23–31

30–33

36–75

 Scale size (mm)

0.5

Morphometrics (% of SL)

 Head length

32.5

25–30

26–32

23.5–29

23–28

 Max. Body height

15.4

20.5–25.5

16.5–21

17.5–24

16–19

 Orbit diameter

6.5

~7

6–7

6.5–7.5

6–6.5

 D1 length

12.4

 A length

9.5

 PL = pectoral length

23.3

16.5–19.0

16–22

 Predorsal to D1

35.0

37–41

34–39.5

34.5–40

31–37

 Predorsal to D2

55.2

54-61

52.5–55

52.0–60.5

49–58

 Preanal

60.5

60–70

54–57.5

55.5–65

54–58

 Base of D1

12.8

9–14

8.5–10.5

7–11

9.5–12

 Base of D2

27.6

15–21

13.5–18.5

13–18

17–22

 Base of A

27.1

10–18

12.5–15.5

12.5–16

15–20

 distance of D1 to D2

6.1

6–10

6.5–13