New Australian Taxa

Open-access, online, rapid taxonomy

ISSN: 2200-####

IMPORTANT NOTE:

This is an unpublished draft. Please do not distribute.

Paper Title

BULUNGU PINPAENSIS sp. nov.

Holotype—MV P150299, right dentary with m4.

 

Type Locality—Lake Pinpa, unit 3 in section 8, South Australia.

 

Age and Stratigraphy—Lake Pinpa, Namba Formation.

 

Etymology—The species name pinpaensis is after Lake Pinpa in which the specimens are found.

Species DiagnosisBulungu pinpaensis sp. nov. differs from Bulungu muirheadae as follows: paraconid-metaconid distance is longer than metaconid-protoconid distance on m4; preentocristid and postentocristid on m4 are oblique; entoconid on m4 is reduced in size.

 

Bulungu pinpaensis sp. nov. differs from Bulungu campbelli as follows: paraconid-metaconid distance is longer than metaconid-protoconid distance on m4; preentocristid and postentocristid on m4 are oblique; entoconid on m4 is reduced in size.

 

Bulungu pinpaensis sp. nov. differs from Bulungu palara as follows: paraconid-metaconid distance is longer than metaconid-protoconid distance on m4; preentocristid on m4 is oblique; postentocristid on m4 present and oblique; cristid obliqua terminates lingual to the midpoint of the tooth width on m4; posthypocristid is oblique to tooth row on m4; entoconid on m4 is reduced in size; hypoconulid on m4 is present.

 

Bulungu pinpaensis sp. nov. differs from Bulungu minkinaensis sp. nov. as follows: preentocristid and postentocristid on m4 are oblique; cristid obliqua terminates lingual to the midpoint of the tooth width on m4; posthypocristid is oblique to tooth row on m4; entoconid on m4 is reduced in size; hypoconulid on m4 is present.

 

Bulungu pinpaensis sp. nov. differs from Bulungu westermani sp. nov as follows: smaller in size.

Description

 

The dentary is broken anteriorly level with the anterior alveolus for m3, and posteriorly, at the anterior section of the ascending ramus. The ascending ramus forms an angle of about 120owith the horizontal ramus. The mandibular foramen is preserved on the lingual side of the dentary, and is ovoid in shape.

 

The m4 is longer than it is wide, with the trigonid much wider than the talonid. A well-developed anterior cingulid is present parallel to the paracristid. The paraconid-metaconid distance is longer than the metacristid, but shorter than the paracristid. The paraconid is anterior to the metaconid, and the protoconid is buccal to the metaconid. The hypoconid is small and is positioned just posterobuccal to the midpoint of the metacristid. The cristid obliqua is curved, oblique to the tooth row and ends posterior to the metaconid. The posthypocristid is straight and oblique to the tooth row, and ends at a minute hypoconulid. The entoconid is oval in shape with am anterobuccally-directed preentocristid and a posterobuccally-directed postentocristid that connects to the posthypocristid at the hypoconulid. A wide hypoflexid is present from the posterior flank of the protoconid to the buccal flank of the hypoconid.

Figure 7. Bulungu pinpaensis sp. nov., holotype MV P150299, right dentary with m4 (A, buccal view; B, lingual view; C, occlusal view). Scale bar equals 2mm.