Genus: Stereognathus CHALESWORTH, 1855
Etymology: Greek, stereos, “strong, solid, firm” and Greek, gnathos, “jaw” + us: Solid jaw.

Species: oolithicus CHALESWORTH, 1855
Etymology:

Holotype: BGS(GSM) 113834 (BMNH M4000?)

Locality: Stonesfield, (SP 387171), Oxfordshire County, England, Southern United Kingdom.

Horizon: Stonesfield Member, Sharps Hill Formation.

Biostratigraphy:

Age: Middle Bathonian Stage, Middle Dogger Epoch, Middle Jurassic.

Material: Fragmentary right maxilla with three broken molars and alveoli for three more.

Referred material:

Number: Not given: Fragmentary left maxilla with roots of 4 molars.

PANCIROLI, WALSH, FRASER & BRUSATTE, 2017

GLRCM MLR 20-22, 20-38, GLRCM 10174, GLRCM TEMP2104, GLRCM TEMP2105_4, GLRCM TEMP2015_6, GLRCM G50137, GLRCM G50236, GLRCM G50505-GLRCM G50508, GLRCM 50647, GLRCM 50705, GLRCM G50907, GLRCM G51108, GLRCM G51221-GLRCM G51224, GLRCM G51243-G51245, GLRCM G51520, GLRCM 51521, GLRCM G51616, GLRCM T51823, GLRCM G51906, GLRACM G51907, GLRCM G52021, GLRCM G52022, GLRCM G52026, GLRCM G52027, GLRCM G52038, GLRCM GT2127, GLRCM G52202, GLRCM G52204, GLRCM G52205, GLRCM G52304, GLRCM G54641, GLRCM G52643, GLRCM G52820, GLRCM G52861, GLRCM G53402-GLRCM G53435, GLRCM 53804, GLRCM G53806, GLRCM G53807, GLRCM G53809, GLRCM G53811, GLRCM 53812, GLRCM G54017, GRLCM G54018, GLRCM G54610, GRLCM G54633, GRLCM G54634, GRLCM G54635, GLRCM G54701, GLRCM G54702, GLRCM G54703, GLRCM G54810, GRLCM G54811, GLRM G55225-GLRCM G55227, GLRCM G55534, GRLCM G55810, GRLCM G56416, GLRCM G56424, GLRCM G56425, GLRCM G56426, GLRCM G56433, GRLCM G510202-GRLCM g510211, GLRCM G75710, NHMUK PV M.36503, NHMUK PV M.36510, NHMUK PF M.36534, NHMUK PV M.36537, NHMUK R.8720, NHMUK PV M.36534, HUMUK PV M.36539, NHMUK PV. M.36506, NHMUK PV M.36543, NHMUK PV M.46103, NHMUK PV M.46266, NHMUK PV M.46261, NHMUK PV M.45265, NHMUK PV M.46268, NHMUK PV M.46270, NHMUK PV M.46271, NHMUK PV M.46273, NHMUK PV M. 46274, NHMUK PV M.46272, NHUM PV M.46374, NHMUK PV M.46375, NHMUK PV M.46277, NHMUK PV M.46373, NHMUK PV M.46382, NHMUK PV M.46383, NHMUK PV M.46384, NHMUK PV M.46415, NHMUK PV M.46255, NHMUK PV M.46263, OUMNH J.21790, OUMNH J.79435, OUMNH J.79439, OUMNH J.79447, OUMNH J.79448, OUMNH J.79459, OUMNH J.79466, OUMNH J.79469, OUMNH J.79470, OUMNH J.79471, OUMN J.79477, OUMNH J.79478, OUMN J.79480, OUMN J.79484, OUMNH J.79492, OUMNH J.21790: Teeth.

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Species: hebridicus WALDMAN, 1973
Etymology: Trivial name derived from the Hebrides, a group name for islands off west coast of Scotland.

Holotype: UBGM 20572

Locality: UB 7111, Isle of Skye, Inverness-Shire County, Scotland, Northern United Kingdom.

Horizon: Great Estuarine Series.

Biostratigraphy:

Age: Middle Bathonian Stage, Middle Dogger Epoch, Middle Jurassic.

Material: Isolated upper left molar.

Hypodigm

UBGM 20573: Isolated upper left molar.

UBGM 20574: Isolated lower left molar.

UBGM 2075: Isolated lower left molar.