Mauisaurus Hector, 1874

Otero, Rodrigo A., Soto-Acuña, Sergio & Rubilar-Rogers, David, 2010, Extremely Rare Turonian Belemnites from the Bohemian Cretaceous Basin and Their Palaeogeographical Importance, Acta Palaeontologica Polonica 55 (2), pp. 361-364 : 362

Mauisaurus Hector, 1874

Type species: Mauisaurus haasti Hector, 1874 .

Mauisaurus sp.

Fig. 2.

Material.—SGO.PV.135: Left femur ( Fig. 2A). SGO.PV.169: Proximal portion of left femur ( Fig. 2B).

Description.—SGO.PV.135: Almost complete femur, originally recovered in three sections, with some loss of bony material at the attached portions. The femur has a gracile shape with its breadth approximately 2/3 of its total length ( Table 1). The distal end has a medial thickness similar to the shaft, becoming narrower to the anterior and posterior margins, of which the posterior margin is the most slender. The articular facets are asymmetrical, with the anterior being shorter and narrower. Distally, the concave angle between facets is close to 210 °. The capitulum is remarkably differentiated from the diaphysis and has a hemispheric shape with a sub−circular contour in proximal view, slightly compressed dorso−ventrally. The trochanter is large and developed diagonally with respect to the axis of the diaphysis, having a constriction that segregates it from the capitulum. This constriction is more excavated along the posterior margin than on the anterior. On the ventral face and near the midpoint of the shaft, a prominent callosity is preserved.

SGO.PV.169 is a proximal portion of a left femur that preserves the capitulum and part of the trochanter. The conserved part of the diaphysis shows a gracile shaft. The capitulum has a hemispheric shape very similar to that of SGO.PV.135, also with a sub−circular contour in proximal view. The trochanter is poorly preserved, but retains part of the constriction between itself and the capitulum. Morphologically, it closely resembles SGO.PV.135, but is larger.