ISSN 0078-8554 Palaeont. afr. (December 2013) 48: 19–23 19 Mustelid and viverrid remains from the Pleistocene site of Cooper’s D, Gauteng, South Africa Hannah J. O’Regan1*, Brigette F. Cohen2 & Christine M. Steininger2 1Department of Archaeology, Humanities Building, University of Nottingham, Nottingham NG7 2RD, U.K. 2Evolutionary Studies Institute, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 South Africa Recieved 20 July 2013. Accepted 8 November 2013 INTRODUCTION Remains of members of the Mustelidae (weasels and badgers) and Viverridae (civets and genets) are not common in African Pleistocene deposits (Werdelin & Peigné 2010). Here we report on new material from both these families from Cooper ’s D, Gauteng. Cooper ’s D is dated to 1.4–1.5 Ma by U-Pb (De Ruiter et al. 2009). Known for the presence of Paranthropus robustus and unusually large accumulations of carnivores, suids and Theropithecus oswaldi for a southern African site, the published faunal list is extensive (De Ruiter et al. 2009). The presence of decalcified breccia in combination with a comprehensive sieving regime has resulted in the recovery of large numbers of smaller mammal bones, and as more of this material has been examined a number of additional taxa have been identified. Amongst these are the six specimens being described here. METHODS All specimens were identified using the modern and fos- sil comparative collections in the Bernard Price Collec- tions housed at the Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, and Ditsong National Museum of Natural History, Pretoria. The Cooper’s D material is held within the Bernard Price Collection (BPI), with the site prefix CD. The Kromdraai B (KB) collection and the Archaeozoology (AZ) collection are both housed at the Ditsong Museum, Pretoria. Comparisons with fossil taxa that were not available in these collections were undertaken by comparison with the literature (e.g. Mellivora benfieldi in Hendey (1978)). DESCRIPTION OF THE COOPER’S D MUSTELIDAE Systematic palaeontology Order Carnivora Bowdich, 1821 Family Mustelidae G. Fischer, 1817 Genus Propoecilogale Petter, 1987 Propoecilogale bolti (Cooke, 1985)1 Material CD 3896, right mandibular fragment with M1 and alveoli for the P4 and M2 (Fig. 1a,b,c). Description A complete M1 is present in a gracile mandible fragment. The M1 has an oval basal contour and is transversely com- pressed and extremely narrow. The protoconid is centrally located on the buccal side and joined lingually to the base is a minute metaconid. The paraconid is short, only slightly higher than the talonid, but the same length as the protoconid and carinate. The talonid is short and quadran- gular with an elongated and carinate hypoconid. The talonid is depressed into a valley that opens at the base of the metaconid. Discussion The very small M1 and gracile mandible of CD 3896 is indistinguishable from the descriptions and photographs of P. bolti given by Petter (1987) and Werdelin & Dehghani (2011). The only difference is that the illustrations given by Petter (1987, p. 208) for P. bolti would suggest that the metaconid is more developed in this species than observed in the Cooper’s material. The mesiodistal length of the M1 is larger than observed in P. bolti and closer to the M1 in Poecilogale albinucha (Table 1). This specimen is beyond question not P. albinucha as the metaconid is absent in this species. It is possible, given the larger size of the Cooper’s material and the possibly more reduced metaconid, that this fossil represents a further step Fossil mustelids and viverrids are rare in the African Pleistocene fossil record. The careful examination of sieved sediments from the well-dated Cooper’s D locality in Gauteng has revealed six new mustelid and viverrid specimens. These represent three uncommon genera – two mustelids, Propoecilogale bolti and Mellivora capensis, and a viverrid, Civettictis cf. civetta. We describe and figure these six specimens here. Cooper’s D is only the fourth African locality at which P. bolti has been identified, and it is the first of the Witwatersrand sites to contain remains of the African civet. Keywords: Civettictis, Mellivora, Propoecilogale, civet, honey badger, weasel. 1The taxonomy of this extinct fossil weasel is somewhat confused. Petter, in Petter & Howell (1985), mentions that she will be naming a new genus of weasel based on the Laetoli material, and will include the specimens described by Cooke (1985) within it, as Prepoecilogale bolti (Petter & Howell 1985, p. 142). However, there is no description of the genus in that paper. The full generic description was published in Petter (1987), in which the spelling had been changed to Propoecilogale bolti. Since then, authors have used both spellings and also both references as the authorities for the taxon. Our reading of the ICZN code suggests that without the description, Prepoecilogale bolti is a nomen nudum, and was therefore superseded by Propoecilogale bolti. Hence we have referred the Cooper’s D material to Propoecilogale.*Author for correspondence. E-mail: hannah.o'regan@nottingham.ac.uk 20 ISSN 0078-8554 Palaeont. afr. (December 2013) 48: 19–23 towards the modern species than the Laetoli material. This being the case it may be more appropriate to name a new species of small mustelid. However, based on the scarcity of material and the placement of it within the Propoecilogale – Poecilogale lineage we feel that the Cooper’s material is best assigned to P. bolti for the time being. Note that the type specimen of P. bolti is a cranium (Cooke 1985) and therefore cannot be directly compared to the Cooper’s D specimen. However the identification and extensive description of Propoecilogale bolti at Laetoli (Petter 1987) was based on both maxillary and mandibular dentition. The inclusion of Poecilogale albinucha in the faunal list given in De Ruiter et al. (2009) was based on the specimen described here. With the assignment of CD 3896 to Propoecilogale, there is now no record of Poecilogale at Cooper’s D. Genus Mellivora Storr, 1780 Mellivora capensis (Schreber, 1776) – Honey badger Material CD 7327, a left distal humerus fragment (Fig. 1d,e). Description A single specimen of Mellivora is identified in the Cooper’s D collection. CD 7327 is a partial distal humerus comprising one quarter of the shaft, the olecranon fossa and the medial epicondyle – both condyles are missing (possibly gnawed off). No standard measurements can be taken of this specimen. A strong flange is present above the lateral epicondyle, and extends along what remains of the shaft. The supracondylar foramen is more visible on the dorsal surface than in the two modern specimens available for comparison. The olecranon fossa is quite low, and the specimen is very broad and flattened dorsally. The articulation is deeply recessed within the olecranon fossa, whereas in the otter, Aonyx capensis, the only other extant mustelid of comparable size, it is much more dorsally placed. The presence of a foramen within the olecranon fossa is a variable feature in modern specimens; there is a hole in the fossa of CD 7327 but this appears to be damage rather than a natural perforation. It is a good match for modern Mellivora capensis, and is closer in size to a modern male than a modern female. Discussion Members of the genus Mellivora are rare at the Wit- watersrand sites, with craniodental remains from Swart- krans Member 2 having previously been described as Mellivora cf. sivalensis (Hendey 1974a), and a distal humerus (KB 3258) from Kromdraai B identified as Mellivora sp. (Gommery et al. 2008). The Cooper’s speci- men (CD 7327) is very similar to both the modern honey badger and the Kromdraai B specimen and is here referred to Mellivora capensis. DESCRIPTION OF THE COOPER’S D VIVERRIDAE Family VIVERRIDAE Gray, 1821 Genus Civettictis Pocock, 1915 Civettictis cf. civetta (Schreber, 1776) – African civet Material CD 15667, left P4 (Fig. 2c,d,e; Table 1); CD 10551, right proximal humerus (Fig. 2a,b). Description CD 15667 is a complete isolated P4. It is a very robust tooth with a large protocone and parastyle and a very Figure 1. Mustelid material from Cooper’s D. Specimen CD 3896, a right mandible fragment of Propoecilogale bolti, is shown in buccal (a), occlusal (b), and lingual (c) views. Specimen CD 7327, a distal left humerus of Mellivora capensis, is shown in ventral (d) and dorsal (e) views. ISSN 0078-8554 Palaeont. afr. (December 2013) 48: 19–23 21 pronounced lingual cingulum along the blade, with two small cusplets on it. It is similar in size to modern Mellivora, but the Cooper’s D specimen has a much larger parastyle, a clearer protocone and a very prominent cingulum on the lingual surface. It is a very good match for modern Civettictis civetta, but there are some small morphological differences in the fossil specimen. The protocone is more robust and is markedly curved in- wards towards the centre of the tooth, the parastyle is larger than most modern civets examined (n = 9) and the cingulum is larger and clearly delineated from the rest of the tooth by a deep channel. The two cusplets on the cingulum were also absent from all modern specimens examined. CD 10551 is a complete proximal humerus with approxi- mately one third of the shaft remaining. It is heavily encrusted with manganese dioxide, making measure- ments approximate, but the morphology is clearly visible. The trochanter has a sinuous or S-shaped curve when viewed superiorly, and there is a small ridge beneath the articulation on the dorsal surface which is only found in civets. It is an excellent match for a female C. civetta in the Ditsong Museum collections. cf. Civettictis sp. Material CD 3263, a right distal radius (Fig. 2f,g); CD 1519, a left proximal 4th metacarpal (Fig. 2h,i). Description These specimens are more difficult to identify but are still most likely to represent cf. Civettictis sp. CD 3263 is a distal radius fragment that is heavily encrusted with manganese dioxide. In terms of size and general characters it is closest to civet and serval (Leptailurus serval); however, in the serval the articulation is broader medio-laterally, the styloid process is more defined and the shaft is more slender. In all of these features CD 3263 is closer to C. civetta. CD 1519 is a small proximal 4th metacarpal, which is also heavily encrusted with manganese dioxide, making the morphology difficult to determine. However, the position of facets for the 3rd metacarpal indicate that is it not caracal (Caracal caracal), and it is too narrow dorso- ventrally to be serval. A small depression on the proximal ventral surface of the shaft is also present in Civettictis, and it has therefore been referred to that genus. Discussion Of the material that has been confidently assigned to Civettictis, the P4 indicates an animal that is more robust than the modern civet, while the humerus is almost identical to a modern specimen. The P4 differs from Pseudocivetta howelli from Tugen Hills, Kenya (Morales et al. 2005; Morales & Pickford 2011), as the Cooper’s D fossil is larger (Table 1) and has a markedly greater distance between the protocone and the paracone, and the cingulum is smooth and much less defined in the Kenyan specimen. In addition, the buccal border of the P4 (as illus- trated in Morales & Pickford (2011)) in both Pseudocivetta howelli and Pseudocivetta ingens is almost straight, while in C. civetta and CD 15667 there is a clear dip inwards at the carnassial notch. In comparison with the only other large viverrid craniodental remains known from South Africa, Viverra leakeyi from Langebaanweg (Hendey 1974b, pp. 75–83), the Cooper’s P4 is substantially smaller in length, but is its equivalent in breadth (see Table 1), and the cingulum is even less developed in V. leakeyi than it is in modern C. civetta. Prior to the Cooper’s D excavation, the only viverrid material identified from the Witwaters- rand sites was a humerus from Kromdraai B (Hendey 1973). While Hendey (1973) did not identify it to genus or species, he noted that it was morphologically indistin- guishable from both C. civetta and V. leakeyi. Brain (1981) referred the same specimen (KB 3258) to Viverra sp., but it has recently been reassigned to Mellivora sp. (Gommery et al. 2008). The reassignment of this single specimen means that currently Cooper’s D is the only Witwatersrand site to have a record of a civet. As there is a paucity of fossil Civettictis material in Africa, we have assigned both the cranial and postcranial specimens to Civettictis cf. civetta as they are clearly very closely related to the modern species. Discussion of Cooper’s D Mustelids and Viverrids A minimum number of one individual of each of the genera Civettictis, Propoecilogale and Mellivora are present Table 1. Dental specimens from Cooper’s D and comparative modern and fossil measurements. L = mesio-distal tooth length, B = bucco-lingual tooth breadth. Propoecilogale bolti and Poecilogale albinucha data from Petter (1987, p. 230), V. leakeyi data from Hendey (1973), P. howelli data from Morales et al. (2005). Site prefixes are as follows: Cooper’s D – CD; Laetoli – LAET; Langebaanweg – L; Tugen Hills – BAR. Species Specimen M1 P4 L B L B Propoecilogale bolti CD 3896 6.1 2.5 LAET 1358 5.6 2.5 Poecilogale albinucha Mean 6.6 Mean 2.7 (modern, n = 5) (range 5.8–7.2) (range 2.2–3.0) Civettictis cf. civetta CD 15667 14.1 11.2 Viverra leakeyi L12863 17.4 11.1 L20253 16.5 10.2 L16224 17.3 10.5 Pseudocivettictis howelli BAR 1812’01 12.8 9.5 22 ISSN 0078-8554 Palaeont. afr. (December 2013) 48: 19–23 at Cooper’s D (Table 2). They are rare both within the deposit and in the wider African fossil record. Of the three genera described here, the remains of Mellivora spp. are most commonly found as fossils in Africa, with specimens reported from 20 localities (Werdelin & Peigné 2010). These include five localities with material referred to Mellivora benfieldi, first described from Langebaanweg by Hendey (1978), and discussed by Petter (1987) as a possi- ble ancestor to the modern M. capensis. To Werdelin & Peigné’s (2010) list can be added: the specimen reassigned by Gommery et al. (2008) from Kromdraai B, the cranio- dental fragments recorded from Swartkrans Member 2 by Brain (1981), and our new identification of M. capensis from Cooper’s D. This substantially increases our knowl- edge of the genus at the Witwatersrand sites during the early Pleistocene. Honey badgers are widely distributed across Africa, in habitats from dense forests to deserts (Larivière & Jennings 2009). The second mustelid species, Propoecilogale bolti, is an extremely rare taxon. In addition to our new identification at Cooper’s D, this species has been identified at Ahl al Oughlam (as Prepoecilogale sp. cf. P. bolti), in Morocco (Geraads 1997), at Bolt’s Farm in South Africa (Cooke 1985), and in the Upper Unit of the Laetolil Beds, Laetoli, Tanzania (Werdelin & Peigné 2010). This very wide but sparse geographic range may be more indicative of sites that have been sieved (Geraads 2008) or that have good preservation of smaller bones, rather than relating to the scarcity of the animal. The modern species Poecilogale albinucha is associated with moist to dry savanna (Skinner & Chimimba 2005), but too little is known of the extinct P. bolti to ascertain its environmental preferences. With the possible exception of genets, viverrid remains occur infrequently in the African fossil record, and when found they are often referred to Viverridae indet. (Werdelin & Peigné 2010). Members of the genus Civettictis have been reported from five sites across East and South Africa, but only one has been confidently assigned to the modern species C. civetta (Werdelin & Peigné 2010). As discussed Table 2. Number of specimens identified for each taxon (NISP), and minimum number of individuals represented by the material (MNI). Taxon NISP MNI Propoecilogale bolti 1 1 Mellivora capensis 1 1 Civettictis cf. civetta 2 1 cf. Civettictis sp. 2 – Figure 2. Viverrid material from Cooper’s D. Specimens attributed to Civettictis cf. civetta are: CD 10551, a proximal right humerus in medial (a) and lateral (b) views, and CD 15667, a left P4, shown in lingual (c), bucco-mesial (d) and occlusal (e) views. Specimens referred to cf. Civettictis sp. are CD 3263, a right distal radius in dorsal (f) and ventral (g) views, and CD 1519, a left proximal 4th metacarpal showing the articulation for the 5th metacarpal (h) and a dorsal view (i). Both of these specimens are heavily encrusted with manganese dioxide. ISSN 0078-8554 Palaeont. afr. (December 2013) 48: 19–23 23 above, the proximal humerus matches the modern material very well, but there are features of the P4 that have led us to describe it as Civettictis cf. civetta. Following the reassignment of the Kromdraai B humerus, the specimens from Cooper’s D are the only civets to have been identified from the Witwatersrand sites. Gauteng lies on the south- ernmost edge of the modern civet’s range (Skinner & Chimimba 2005). The extant African civet lives in ‘forest and open habitats (particularly with dense ground cover)’ and is also ‘associated with riverine habitat in drier regions’ (Jennings & Veron 2009, p. 210), and Ray (1995) reports that it has been found between sea level and up to 5000m. However, in southern Africa it is found largely in ‘forest and well-watered savannah’ (Skinner & Chimimba 2005). It is omnivorous with dietary habitats differing by region and by season (Jennings & Veron 2009). Thus the presence of a civet at Cooper’s D may indicate some dense vegetation and/or water in the vicinity of the site. The three taxa reported here do not help to refine our understanding of the palaeoenvironment at Cooper’s D, as the two extant species have wide ecological tolerances, and the third (Propoecilogale bolti) is very poorly known. CONCLUSION The viverrid and mustelid material described here expand the known fossil distribution of these relatively rare taxa at a well-dated (1.5–1.4 Ma) locality in southern Africa. The African civet Civettictis cf. civetta is the first to be reported from any of the Gauteng sites, and the Cooper’s D assemblage also provides further evidence for the presence of the honey badger and Propoecilogale in the Witwatersrand region. This work emphasises the impor- tance of examining all material, including postcrania, from a site and equally the importance of sieving the deposits to retrieve rarely-found and smaller taxa such as Propoecilogale. The authors would like to express their appreciation to the Ditsong National Museum of Natural History and the Evolutionary Studies Institute at the Univer- sity of the Witwatersrand for access to their comparative collections. In particular, we thank Teresa Kearney, Curator of the Modern Small Mammal collection, Shaw Badenhorst, Curator of the Archaeozoology and Large Mammal Section, and Stephany Potze, Collections Manager of the Palaeontological collections at the Ditsong National Museum of Natural History, and Bernard Zipfel, Senior Collec- tions Curator at the Evolutionary Studies Institute, for their assistance. This study was financially supported by awards to B.F.C. from the Palaeontological Scientific Trust (PAST), the South African National Research Foundation and the University of the Witwatersrand Postgraduate Merit Award. C.M.S. thanks PAST for funding the initial excavation during which most of the specimens were found. HO’R’s research on the Cooper’s D Carnivora was supported by a Liverpool John Moores University Early Career Researcher Award in 2010, and PAST in 2008. REFERENCES BRAIN, C.K. 1981. The Hunters or the Hunted? An Introduction to African Cave Taphonomy. Chicago, University of Chicago Press. COOKE, H.B.S. 1985. Ictonyx bolti, a new mustelid from cave breccias at Bolt’s farm, Sterkfontein area, South Africa. South African Journal of Science 81, 618–619. DE RUITER, D.J., PICKERING, R., STEININGER C.M., KRAMERS, J.D., HANCOX, P.J. CHURCHILL, S.E. BERGER, L.R. & BACKWELL, L. 2009. 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