New Australian Taxa
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BULUNGU CAMPBELLI Travouillon et al. 2013
Holotype— SAM P13853 (cast UCMP 126558), right dentary with m1-4, associated right maxilla with M3, broken M4, and broken M2.
Type locality— Ngapakaldi Quarry, site code V 5858, Lake Ngapakaldi, Etadunna Formation, Ngapakaldi LF, Zone C.
Remarks—Travouillon et al. (2013) described the type of this taxon. The holotype had been previously described in a PhD thesis (Campbell, 1976), in addition to a partial M2, and a left dentary with alveoli for c1, p1-3, talonid of m1, intact m2-3 and fragment of m4, which were no longer present when Travouillon et al. (2013) described the taxon. A cast of the holotype, UCMP 126558, has since been found, and preserves the morphology of the M2, which is described below. The left dentary was found in the collection of the UCMP, and is described below.
See Travouillon et al. 2013.
The M2 is missing the entire metastylar shelf. StA is present and connects to the preparacrista. StB is oval, with a crest running posteriorly. StC is absent. The precise point of termination of the postparacrista is difficult to assess because the metastylar shelf is missing, but it clearly terminates posterior to StB. The protocone is posterolingual to the paracone. The preprotocrista is straight and ends at the buccal flank of the paracone. The postprotocrista is curved and ends at the tip of the small metaconule, at the buccal base of the metacone (a V-shaped break indicates the approximate position of the the metacone).
The dentary is broken just anterior to the canine, through the alveoli for two incisors, suggesting that the incisors were directly anterior to the canine with no diastema present. The canine alveolus is large, and would have housed a relatively large canine. A short diastema is present between the canine and the p1, shorter than the anterior root of p1. The p1 alveoli suggest that the p1 was long and narrow. No diastema separate the alveoli for p1 and p2. A mental foramen is present on the buccal side of the dentary below the p1 and p2 junction. The alveoli of p2 suggest that the p2 was longer and wider than the p1. No diastema separates the p2 and p3. The alveoli of p3 suggest that the p3 was shorter but wider that the p2. A second mental foramen is present below the posterior root of p3. The morphology of the m2 and m3 are as described by Travouillon et al. 2013.
Figure 4. Bulungu campbelli, SAM P13853, left dentary with talonid of m1, m2-3 (A, buccal view; B, lingual view; C, occlusal view); close up on m2-3 (D, occlusal view). Scale bars equals 5mm (A-C) and 2mm (D).