TABLE 1. Measurements (in mm) of Leptonectes sp. specimen MUJA 3687.
| Measurements | (mm) | |
| Quadrate | maximum height | 93 |
| maximum antero‐distal length | 100 | |
| Atlas | length | 24 |
| Axis | length | 18 |
| Left coracoid | length | 134 |
| width | 121 | |
| Left humerus | length | 130 |
| proximal width | 60 | |
| distal width | 108 | |
| Tooth | length | 3.2 |
| Crown | length | 1.3 |
TABLE 2. List of specimens recovered from the Rodilles Formation by the scientific staff of the MUJA plus materials donated by local people from the same area.
| Specimen | Indentification | Material | Provenance | Stratigraphy | Collected by |
| MUJA 3867 | Leptonectes sp. | Partial mandible and skull, teeth,vertebrae, partial pectoral girdle and forefin | Ensenada de La Conejera (Selorio, Villaviciosa) | Rodiles Formation, Jamesoni ammonite zone | Scientific staff of the MUJA |
| MUJA 4095 | Leptonectidae indet. | dentray, tip of the snout, teeth and two fin elements | Ensenada de La Conejera (Selorio, Villaviciosa) | Rodiles Formation, Jamesoni ammonite zone | Scientific staff of the MUJA |
| MUJA 1020 | Ichthyosauria indet. | Partial mandible with symphisis and teeth | Santa Mera (Selorio, Villaviciosa) | Rodiles Formation, Jamesoni ammonite zone | Scientific staff of the MUJA |
| MUJA 4154 | Ichthyosauria indet | Fin elements | Santa Mera (Selorio, Villaviciosa) | Rodiles Formation, Jamesoni ammonite zone | Scientific staff of the MUJA |
| MUJA 4069 | Ichthyosauria indet | Four partial articulated vertebrae | Huerres (San Juan de Duz, Colunga) | Rodiles Formation, Jamesoni ammonite zone | Scientific staff of the MUJA |
| MUJA 4227 | Ichthyosauria indet | Rostral fragment | Santa Mera (Selorio, Villaviciosa) | Rodiles Formation, Jamesoni ammonite zone | Scientific staff of the MUJA |
| MUJA 4627 | Ichthyosauria indet | Four articulated vertebrae | El Puntal (SanMartín del Mar, Villaviciosa) | Rodiles Formation | Amateur (O.Fernández) |
| MUJA 4150 | Ichthyosauria indet | One isolated vertebra | Playa de Peñarrubia (Somió, Gijón) | Rodiles Formation | Amateur (B.Santaeugenia) |
| MUJA 4170 | Ichthyosauria indet | One isolated vertebra | Playa de Serín (Somió, Gijón) | Rodiles Formation | Amateur (B.Santaeugenia) |
| MUJA 4268 | Ichthyosauria indet | Poorly preserved fragment of premaxilla and dentary | Playa de Peñarrubia (Somió,Gijón). | Rodiles Formation | Amateur (B.Santaeugenia) |
