Table 6 Eggcase dimensions reported in several geographical areas by latitudinal clines

D. nidarosiensis

182–260

95–120

Atlantic (Norwegian Sea)

[56]

182–260

92–113

Atlantic (North Sea)

[57]

153–177 (170.2 ± 9.8)

61.8–80.5 (74.8 ± 7.5)

Mediterranean (Sardinia)

Present study

D. oxyrinchus

133

79.5

Atlantic (British waters)

[58]

128–133

74–101

Atlantic (British waters)

[59]

120–235

58–120

Atlantic (North Sea)

Bor [57]

102–126 (112 ± 10.4)

60–66 (63.8 ± 2.6)

Atlantic (British waters)

[30]

100–150

–

Mediterranean/Atlantic

[3]

91.6–116.2 (103.8 ± 5.3)

48.9–67.5 (57 ± 4.0)

Mediterranean (Sardinia)

Present study

35–46 (38.4 ± 0.7)

17–28 (24.2 ± 0.2)

Mediterranean (Tunisia)

[23]

140

–

Mediterranean (Naples)

[21]

L. melitensis

42.3–45 (44.1 ± 1.0)

22.4–26.0 (23.9 ± 1.4)

Mediterranean (Sentinelle Bank)

Present study

R. asterias

30–45

–

Mediterranean

[3]

39.7–55.4 (48.3 ± 3.0)

22.4–40.5 (33.7 ± 2.6)

Mediterranean (Sardinia)

Present study

45

–

Mediterranean (Naples)

[21]

R. brachyura

122 ± 5

68 ± 4

Atlantic (Portuguese waters)

[38]

136

76

Atlantic (British waters)

[60]

128.4

78.5

Atlantic (British waters)

[58]

115–143

72–90

Atlantic (British waters)

[59]

82–132.2 (108.6 ± 10.1)

32.7–86.4 (65.4 ± 11.7)

Atlantic (British waters)

[30]

121

79

Atlantic (North Sea)

[61]

115

70

Atlantic (North Sea)

[62]

120

–

Mediterranean/Atlantic

[3]

115–143

–

Mediterranean

[15]

113–133 (119.3 ± 4.9)

64.7–72.2 (69.5 ± 2.3)

Mediterranean (Sardinia)

Present study

105

–

Mediterranean (Naples)

[21]

R. clavata

65 ± 5

48 ± 5

Atlantic (Portuguese waters)

[38]

80

50

Atlantic (France)

[63]

63–90 (74.9)

49–68.5 (67.1)

Atlantic (British waters)

[58]

60–90

50–70

Atlantic (British waters)

[59]

32.7–83.3 (67.2 ± 10)

32.7–69 (37 ± 8.2)

Atlantic (British waters)

[30]

70

50

Atlantic (North Sea)

[62]

60–90

–

Mediterranean/Atlantic

[3]

61–66

–

Mediterranean (France)

[22]

62.5–67.5 (64.1 ± 1.9)

41.7–47.4 (43.8 ± 2.0)

Mediterranean (Sardinia)

Present study

70–78 (75)

50–54 (52)

Mediterranean (Tunisia)

[64]

60

–

Mediterranean (Naples)

[21]

R. miraletus

48–52

–

Atlantic (Senegal)

[65]

46 ± 3

26 ± 2

Atlantic (Portuguese waters)

[38]

<50

–

Atlantic (South Africa)

[66]

45–52

–

Mediterranean/Atlantic

[3]

41.8–56.5 (47.4 ± 4.0)

22.8–29.2 (24.7 ± 1.7)

Mediterranean (Sardinia)

Present study

42–47

–

Mediterranean (Tunisia)

[67]

59

–

Indian Ocean

[45]

R. polystigma

35–46

–

Mediterranean

[3]

56.6–69.2 (62.3 ± 4.3)

33.9–44.3 (37.9 ± 2.9)

Mediterranean (Sardinia)

Present study