Table 1 Sutural pseudoinversion in studied non-heteromorph ammonites
From: Pseudoinversion of septal sutures in Middle Jurassic–Lower Cretaceous non-heteromorph ammonites
Taxon | Number of specimens with pseudoinversion | Type of pseudoinversion | What is affected | Trends | Repository | Age | Locality with coordinates | Collected or figured by |
|---|---|---|---|---|---|---|---|---|
Indosphinctes mutatus (Trd.) | 3 | Normal and transitional | Complete suture line | Pseudoinversion became stronger through ontogeny | PIN RAS | Callovian | Nikitino, 54.354652 N, 40.407924 E | A.S. Shmakov (PIN RAS) |
Erymnoceras baylei Jeannet | 1 | Transitional | Complete suture line | Clearly visible in last suture | PIN RAS | Callovian | Alpatyevo, 54.882576 N, 39.335427 E | M.A. Rogov |
Pictonia flodigarriensis Matyja, Wierzbowski et Wright | 1 | Transitional | Complete suture line | Stays without changes in expression through last septated whorl | MWG UW | Kimmeridgian | Flodigarry, 57.661637 N, 6.242807 W | Wierzbowski et al. (2018, Fig. 6a) |
Aspidoceras ex gr. caletanum (Oppel) | 1 | Transitional | Complete suture line | Appears in last three suture lines | PIN RAS | Kimmeridgian | Lipitsy, 54.311243 N, 35.559625 E | A.A. Mironenko (GIN RAS) |
Kachpurites involutus Rogov | 1 | Normal | Complete suture line | Stays without changes in expression | IGM | Volgian | Kuntsevo (Moscow), 55.742798 N, 37.441320 E | M.A. Rogov |
Craspedites (Craspedites) planus Schulg. | 1 | Transitional | Lateral saddles | Visible in few suture lines only | CNIGR | Volgian | Kheta river, 70.555502 N, 95.307669 E | Shulgina (1969, Pl. XXIX, Fig. 1) |
Craspedites (Trautscholdiceras) sp. indet. | 2 | Transitional | Lateral saddles | Visible in few suture lines only | PIN RAS | Volgian | Ogarkovo, 57.525626 N, 43.359933 E | M.A. Rogov |
Craspedites (Trautscholdiceras) milkovensis (Strem.) | 1 | Transitional | Lateral saddles | Visible in few suture lines only, disappear towards aperture | PIN RAS | Volgian | Kashpir, 53.027164 N, 48.453800 E | M.A. Rogov |
Craspedites (Taimyroceras) sachsi Igoln. | 1 | Normal | Complete suture line | Stays without changes in expression throughout visible septate whorls | TsGSM | Ryazanian | Nordvik, 73.869745 N, 113.170089 E | Igolnikov (2012, Pl. 2, Fig. 1) |
Delphinites alatyrensis (Kemper) | 1 | Normal | Complete suture line | Appears in few successive suture lines and disappear later | GGM | Valanginian | Mishukovo, 55.043150 N, 46.162810 E | Mitta (2018, Pl. I, Fig. 1) |