# Balabansai Formation

The Balabansai Formation (sometimes transcribed Balabansay, also known as Balabansai Svita) is a geological formation in Kazakhstan, Kyrgyzstan and Uzbekistan whose strata date back to the Bathonian and Callovian stages of the Middle Jurassic. Dinosaur remains are among the fossils that have been recovered from the formation. The lithology primarily consists of variegated sandstones, siltstones, claystones, and rare gravels and marls. Many taxa have been found in the formation, including amphibians and mammals.

## Vertebrate paleofauna

Indeterminate Avialae remains located in Ongtustik Qazaqstan Oblysy, Kazakhstan.

### Fish

Fish of the Balabansai Formation :
| Genus | Species | Notes |
| Ferganamia | F. verzilini | A bowfin |
| Ferganoceratodus | F. jurassicus | A lungfish |
| Palaeobates | P. verzilini | An elasmobranch |
| Polyacrodus | P. balabansaiensis, P. prodigialis | A hybodont |

### Amphibians

Amphibians of the Balabansai Formation :
| Genus | Species | Presence | Notes |
| Ferganobatrachus | F. riabinini | | Temnospondyl |
| Kokartus | K. honorarius | | Salamander |

### Turtles

Turtles of the Balabansai Formation :
| Genus | Species | Presence | Notes |
| Toxocheloides | T. narynensis | | |
| Xinjiangchelys | X. tianshanensis, X. latimarginalis | | Xinjiangchelydae |

### Lizards

Lizards of the Balabansai Formation :
| Genus | Species | Presence | Notes |
| Changetisaurus | C. estesi | | Relative of Dorsetisaurus |
| Lacertilia | Indeterminate | | |

### Choristoderes

Choristoderes of the Balabansai Formation :
| Genus | Species | Presence | Notes |
| Choristodera | Indeterminate | | Similar to Cteniogenys |

### Crocodyliformes

Crocodyliformes :
| Genus | Species | Presence | Notes |
| Sunosuchus | Indeterminate | | |

### Dinosaurs

Dinosaurs :
| Genus | Species | Presence | Material | Notes |
| Praeornis | P. sharovi | Geographically located in Ongtustik Qazaqstan Oblysy, Kazakhstan. | | |
| Alpkarakush | A. kyrgyzicus | Jalal-Abad Oblast, Kyrgyzstan | A partial skeleton including skull bones, partial pectoral and pelvic girdles, dorsal and sacral vertebrae, and most of the hindlimbs | A metriacanthosaurid theropod |
| Ferganasaurus | F. verzilini | Located within Kyrgyzstan | | Basal sauropod |
| Ferganocephale | F. adenticulatum | Located within Kyrgyzstan | | Dubious taxon, Neornithischia indet. |
| Neosauropoda indet. | Family, genus and species indeterminate | Kyrgyzstan | A heavily worn tooth, the apex of a tooth crown, a left metatarsal I, and a right manual phalanx | |
| Tetanurae indet. | Family, genus and species indeterminate | Kyrgyzstan | Dozens of teeth | |
| Stegosauria indet. | Family, genus and species indeterminate | Kyrgyzstan | Four posterior dorsal vertebrae | May be as old as Adratiklit. Remains not diagnostic, given nomen nudum "Ferganastegos" by Roman Ulansky. |

### Pterosaurs

Mammals :
| Genus | Species | Presence | Notes |
| Rhamphorhynchinae indet. | Genus and species indeterminate | Kyrgyzstan | |

### Mammals

Mammals :
| Genus | Species | Notes |
| Ferganodon | F. cf. naryensis | A eutriconodont |
| Paritatodon | Indeterminate | A docodont or a shuotheriid |
| Simpsonodon | Indeterminate | A docodont, multiple species present |
| Tashkumyrodon | T. desideratus | A docodont |
| Amphilestidae | Indeterminate | |
| Amphitheriidae | Indeterminate | |
| Docodonta | Indeterminate | |
| Paurodontidae | Indeterminate | |
| Tegotheriidae | Indeterminate | |
| Tinodontidae | Indeterminate | |
| Triconodontidae | Indeterminate | |

## Invertebrate paleofauna
### Molluscs

| Genus | Species | Notes |
| Proparreysia | "P. thashkumyrica" | A bivalve |
| Sulcatapex | "S. chatkalica" | A bivalve |
| Yeniella | "Y. asiatica", "Y. sculpturata" | A bivalve |

## Flora
### Conifers

| Genus | Species | Presence | Notes |
| Podozamites | P. lanceolatus | | |

### Ferns

| Genus | Species | Presence | Notes |
| Cladophlebis | C. whitbiensis | | |
| Coniopteris | C. furssenkoi, C. hymenophylloides | | |