Hemipristis curvatus (Dames, 1883), 1988

Zouhri, Samir, Gingerich, Philip D., Khalloufi, Bouziane, Bourdon, Estelle, Adnet, Sylvain, Jouve, Stéphane, Elboudali, Najia, Amane, Ayoub, Rage, Jean-Claude & Tabuce, Rodolphe, 2021, Middle Eocene vertebrate fauna from the Aridal Formation, Sabkha of Gueran, southwestern Morocco, Geodiversitas 43 (5), pp. 121-150 : 127-129

Hemipristis curvatus (Dames, 1883)

EXAMINED MATERIAL. — Five broken isolated teeth, figured material includes FSAC Bouj-343.

DESCRIPTION

An upper tooth ( Fig. 4D ) belonging to the snuggle tooth shark Hemipristis curvatus was recovered from the Locality 1. The crown is compressed labio-lingually, slanted distally with unserrated mesial cutting edge.

REMARKS

The snuggle tooth shark, Hemipristis curvatus is known in all the tropical seas during the late Eocene, from Western Neotethys (e.g., Case & Cappetta 1990; Mustafa & Zalmout 2002; Underwood et al. 2011) to western central Atlantic (e.g., Case & Borodin 2000). Its occurrence in the middle Eocene is less usual ( Underwood et al. 2011). Only two teeth were recorded in MI ( Underwood et al. 2011), it becomes common from the GE A-C (around the

Bartonian/Priabonian boundary) and within the rest of the BQ (Priabonian).

Figures

FIG. 4. — Elasmobranchii from Sabkha of Gueran collected around the Archaeocete whale carcasses.A-C, Physogaleus sp.: A, FSAC Bouj-340 anterolateral tooth (A1) labial and (A2) lingual views; B, FSAC Bouj-341 more anterolateral tooth in (B1) labial and (B2) lingual views; C, FSAC Bouj-342 lateral tooth in (C1) labial and (C2) lingual views; D, FSAC Bouj-343 Hemipristis curvatus lateral upper tooth in (D1) labial and (D2) lingual views; E, F, FSAC Bouj-344 Abdounia sp. lateral teeth in labial (E1, F1) and lingual (E2, F2) views; G-I, Cf. Carcharhinus sp.: G, FSAC Bouj-345 lateral upper tooth in (G1) labial and (G2) lingual views; H, FSAC Bouj-346 lateral lower tooth (H1) labial and (H2) lingual views; I, FSAC Bouj-347 anterior lower tooth in (I1) labial and (I2) lingual views. J, Propristis schweinfurthi FSAC Bouj-348 rostral “tooth” in (J1) dorsal and (J2) lateral views. Scale bars: 10 mm.