Silvaroo bandharr

Prideaux, Gavin J. & Warburton, Natalie M., 2023, A review of the late Cenozoic genus Bohra (Diprotodontia: Macropodidae) and the evolution of tree-kangaroos, Zootaxa 5299 (1), pp. 1-95 : 31

Bohra sp. cf. B. bandharr

cf. Dendrolagus sp. 1 : Flannery & Archer (1984), pp. 358–359, 361–362, figure 1F–G, table 1. Rich (1991), p. 1049.

cf. Dendrolagus sp. 2 : Flannery & Archer (1984), pp. 358–359, 362–363, figure 1F–G, table 1. Rich (1991), p. 1049. Tedford et al. (1992), p. 187.

cf. Dendrolagus: Tedford et al. (1992) , p. 190, table 3; partim.

Protemnodon?cf. bandharr: Dawson et al. (1999) , pp. 281, 287, table 10.

Dendrolagus sp. 2 : Dawson et al. (1999), p. 281.

Dendrolagus sp. : Dawson (2004a), pp. 267, 270–272, table 1; partim.

Silvaroo sp. indet. 1: Dawson (2004b), pp. 283, 286, figure 3.

Silvaroo sp. 1 : Dawson (2004b), p. 288, table 2.

Dendrolagus sp. indet.: Prideaux & Warburton (2008), pp. 463–464, figure 1; partim. Silvaroo sp. : Louys & Price (2015), pp. 565, 567, 569, figure 8N.

Referred specimens. Chinchilla Rifle Range (site not specified), Queensland. QM F43281, partial right adult dentary (preserving m3–4). QM F58665, partial right adult dentary (preserving m3–4); QM F61040, right i1. Collected by Doris and Cecil Wilkinson.

Probably Chinchilla. QM F4750, partial right adult dentary (preserving incomplete p3, m1–4). This specimen retains no associated locality information. Chinchilla Sand is suggested by preservation (chocolate-brown bone, blue-grey enamel and yellow- to orange- to chocolate-brown adhering matrix), which has been used to retrospectively, albeit tentatively, differentiate Chinchilla Sand specimens from other Darling Downs material (e.g., Bartholomai 1963, 1975; Bartholomai & Woods 1976; Louys & Price 2015). Collection details are unknown, but it was very likely collected in the late 19 th century. The specimen was ascribed the number 8808 in De Vis’s catalogue.

Bow, New South Wales. AM F59576, partial right adult maxilla (preserving M2–3); AM F64004, posterior half of left P3; AM F64007, right M4; AM F64075, partial left maxilla (preserving very worn M2–4). AM F64245, left M4.

Fisherman’s Cliff, Warrananga Station, New South Wales. NMV P38267, left M2; MNV P38351, left M3 metaloph; NMV P38325, right p3. Collected by Edmund Gill and others in the late 1960s or James Warren and others in the early 1970s.

FUPS Quarry, Bone Gulch, Moorna Station , New South Wales . NMV P257273 , partial left P3 ; NMV P257274 , left M3 ; NMV P257275 , right M1 metaloph. These specimens were picked from concentrate sieved from sediment collected by a team led by GJP. NMV P257273 was collected on 14 February 2016 , NMV P257274 on 16 August 2015 , and NMV P257275 on 15 February 2016 .

Remarks. An assortment of specimens have been grouped under this limbo nomen ( Figure 16–18 ) because they share dentary or cheek-tooth traits with specimens of B. bandharr (e.g., comparatively rectangular upper molars, dentary with a long, rounded postalveolar shelf), but differ by having narrower, much smaller molars ( Table 2 ). NMV P38325, by contrast, is a p3 from the early Pleistocene Fisherman’s Cliff LF ( Figure 1 ) referred to B. sp. cf. B. bandharr by association with several loose molars, and the general similarity of its form ( Figure 18J–L ) to that of the only other unworn p3 known for a species of Bohra , that of the paratype of B. illuminata ( Figure 24D ).

The barrier to defining a species from among this collective is the lack, in any one specimen, of sufficient diagnostic attributes that would permit its selection as a reliable holotype. Obtaining further tree-kangaroo fossils from the Chinchilla and Bow localities ( Figure 1 ) may offer the greatest chance of solving this impasse. Nevertheless, although it lacks a name, it would be reasonable to assume that within the sample referred to B. sp. cf. B. bandharr there is yet another late Cenozoic species of Bohra .

Figures

FIGURE 1. Map of Australia and New Guinea showing localities that have produced fossils attributable, or potentially attributable, to species of Bohra.

FIGURE 16. Dentary specimens of Bohra sp. cf. B. bandharr. QM F4750, partial right adult dentary (A–C). A: lateral view. B: mesial view. C: stereo occlusal view. QM F58665, partial right adult dentary (D–F). D: lateral view. E: mesial view. F: stereo occlusal view. QM F61040, right i1 (G–H). G: buccal view. H: lingual view. QM F43281, partial right adult dentary (I–K). I: lateral view. J: mesial view. K: stereo occlusal view.

FIGURE 17. Maxillary and upper dental specimens of Bohra sp. cf. B. bandharr. AM F64075, partial left adult maxilla (A–B). A: lateral view. B: stereo occlusal view.AM F59576, partial right adult maxilla (C–E). C: lateral view. D: mesial view. E: stereo occlusal view. AM F64007, right M4 (F–J). F: buccal view. G: lingual view. H: anterior view. I: posterior view. J: stereo occlusal view. K:AM F64245, left M4, stereo occlusal view.AM F64004, posterior half of left P3 (L–P). L: lingual view. M: buccal view. N: anterior view. O: posterior view. P: stereo occlusal view.

FIGURE 18. Cheek teeth of Bohra sp. cf. B. bandharr. NMV P257274, left M3 (A–E). A: stereo occlusal view. B: anterior view. C: posterior view. D: lingual view. E: buccal view. NMV P38267, left M2 (E–G). F: stereo occlusal view. G: anterior view. H: anterior view. I: NMV P257273, partial left P3, stereo occlusal view. NMV P38325, right p3 (J–L). J: buccal view. K: lingual view. L: stereo occlusal view.

FIGURE 24. Craniodental specimens of Bohra illuminata. WAM 03.5.10, holotype (A, G–J). A: left upper cheek-tooth row in stereo occlusal view. G: right m4 in stereo occlusal view. H: left lower cheek-tooth row in stereo occlusal view. I: left i1 in buccal view. J: left i1 in lingual view. WAM 02.7.16 (B–F). B: incomplete, unerupted right P3 in stereo occlusal view. C: left M1 in in stereo occlusal view. D: right p3 in stereo occlusal view. E: right m1 in stereo occlusal view. F: right m2 in stereo occlusal view. SAMA P59526, left i1 (K–L). K: buccal view. L: lingual view.