Table 4
Measurements of Derogenes abba n. sp. from Hippoglossoides platessoides off Svalbard and Derogenes spp. first described from the Mediterranean. *Diameter. 1We included measurements from the redescription of Rudolphi’s specimen by Lühe (1901) as the original description did not provide any measurements. 2Ratio given by Brinkmann (1967). For the 6th Mediterranean species D. bonnieri (Monticelli, 1893) from Eutrigla gurnardus off Wimereux, France [44], only body length (1500–2000) was given.
| Species | Derogenes abba n. sp. | D. affine (Rudolphi, 1819) | D. latus Janiszewska, 1953 | D. minor Looss, 1901 | D. robustus Brinkmann, 1967 | D. ruber |
|---|---|---|---|---|---|---|
| Host | Hippoglossoides platessoides | Scorpaenopsis cirrosa 1 | Mullus barbatus | Labrus merula | Serranus scriba | C. lastoviza |
| Locality | Svalbard, Arctic Ocean | Rimini, Italy, WM | Split, Croatia, CM | Trieste, Italy, WM | Rhodes, Greece, CM | Trieste, Italy, WM |
| Source | Present study | [41]1 | [25] | [3] | [9] | [3] |
| Number of specimens | 14 | 1 | – | 1 | 1 | 2 |
| Body length | 1100–1450 (1150) | 1400 | – | 2022 | 2600 | 7869 |
| Body width | 370–450 (450) | 400 | – | 477 | 850 | 1847 |
| Forebody | 396–485 (483) | – | – | 983 × 500 | – | 3765 × 1714 |
| Hindbody | 350–400 (390) | – | – | 706 × 366 | – | 2750 × 959 |
| Preoral lobe length | 20–38 (25) | – | – | 22 | – | 88 |
| Ventral sucker | 226–425 (350) × 210–430 (355) | 250* | 800 × 630 | 349 × 321 | 550 * | 1257 × 123 |
| Oral sucker | 95–180 (150) × 110–225 (160) | 190* | 500 × 450 | 222 × 207 | 250* | 655 × 708 |
| Sucker-L R | 100* | – | – | 2 : 3*,2 | ||
| Sucker-W R | – | – | – | – | – | |
| Pharynx | 61–97 (75) × 64–93 (75) | – | 180 × 160 | 91 × 96 | – | 254 × 275 |
| Sinus sac | 93–102 (95) × 84–99 (80) | – | 97 × 92 | – | 289 × 291 | |
| Seminal vesicle | 56–80 (75) × 38–65 (54) | – | 310 × 90 | 119 × 32 | – | 291 × 134 |
| Left testis | 150–119 (154) × 84–110 (92) | – | 340 × 190 | 115 × 88 | – | 271 × 353 |
| Right testis | 136–148 (150) × 113–154 (78) | – | 136 × 101 | – | −256 × 280 | |
| Ovary | 120–182 (143) × 110–168 (132) | – | 340 × 110 | 129 × 107 | – | – |
| Left vitelline mass | 201–256 (228) × 136–207 (176) | – | 540 × 350 | 180 × 103 | – | 546 × 658 |
| Right vitelline mass | 181–280 (216) × 133–185 (162) | – | 204 × 109 | – | 550 × 446 | |
| Eggs | 40–52 (48) × 28–34 (30) | 45 × 20 | 56 × 26 | 58 × 39 | 55 × 30 | 62 × 39 |
Abbreviations: CM, Central Mediterranean. WM, Western Mediterranean.
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