Prepoplanops, Carlini, Alfredo A., Brandoni, Diego & Dal Molin, Carlos N., 2013

Carlini, Alfredo A., Brandoni, Diego & Dal Molin, Carlos N., 2013, A new genus and species of Planopinae (Xenarthra: Tardigrada) from the Miocene of Santa Cruz Province, Argentina, Zootaxa 3694 (6), pp. 565-578 : 568

Genus Prepoplanops new gen.

( Figs. 3 , 4 , 5 , 6 , 7 E)

Type species: Prepoplanops boleadorensis new sp.

Derivation of name: from the combination of characters that resemble a mixture characteristic of Planops and Prepotherium .

Diagnosis: Similar in size to Planops magnus . Occipital condyles prominent, with their ventral margins below the level of the occlusal plane. Palatal predentary portion very long, lateral margins of the maxillae converge anteriorly up to the premaxillae notch, but diverge forward; palate flat at its anteriormost portion and nearly convex at the Mf3-5 level; posterior margin of the palate behind the Mf5; maxillo-palatal suture between the Mf2-3. Alveoli of the Cf oval in cross-section and separated from the Mf tooth-row by a very short diastema (similar in length to the anteroposterior length of the caniniform); Mf1-Mf4 subquadragular in outline with rounded edges and a labiolingual major axis, Mf5 oval and with a posterior notch. Mandibular predentary length greater than the tooth-row cf1-mf3 length; very short lower diastema (shorter than the anteroposterior length of cf1) between the caniniform and the molariform tooth-row. Slender ulna.

Figures

FIGURE 3. Skull of Prepoplanops boleadorensis (MLP 97 - XI- 3 - 1). (A) dorsal view, (B) left lateral view, and (C) palatal view.

FIGURE 4. Mandible of Prepoplanops boleadorensis (MLP 97 - XI- 3 - 1) (A) left lateral view and (B) occlusal view.

FIGURE 5. Pos-cranial elements of Prepoplanops boleadorensis (MLP 97 - XI- 3 - 1). Right humerus in (A) anterior view and (B) posterior view; right ulna (proximal half) in (C) anterior view and (D) medial view; right femur (without its head) in (E) anterior view and (F) distal view; right tibia and fibula (articulated) in (G) posterior view and (H) anterior view.

FIGURE 6. Left articulated partial pes of Prepoplanops boleadorensis (MLP 97 - XI- 3 - 1).

FIGURE 7. Comparative palatal views of the best known Planopinae. (A) Holotype of Planops martini (BM (NH) M 9204); (B) holotype of Planops magnus (AMNH PV 15346); (C) holotype of Planops longirostratus (no collection number); (D) Planops longirostratus (AMNH 9302); (E) Holotype of Prepoplanops boleadorensis (MLP 97 - XI- 3 - 1); (F) Holoype of Prepotherium filholi (no collection number).