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Osteolaemus osborni (SCHMIDT, 1919)

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Higher TaxaCrocodylidae (Crocodylia, crocodiles)
Subspecies 
Common NamesE: Osborn’s Dwarf crocodile
G: Osborns Stumpfkrokodil 
SynonymOsteoblepharon osborni SCHMIDT 1919: 421
Osteolaemus tetraspis osborni — WERMUTH 1953
Osteolaemus tetraspis osborni — WERMUTH & MERTENS 1977
Osteolaemus osborni — EATON et al. 2009
Osteolaemus osborni — ZIEGLER et al. 2017 
Distributionosborni: Congo Basin

Type locality: forests of the northeastern Belgian Congo, Niapu  
Reproductionoviparous. 
TypesHolotype: AMNH 10082 
DiagnosisDiagnosis: Nasal bones entering the nasal aperture, not produced as a bony nasal septum. Splenial elements not entering the mandibular symphysis, which extends to the fourth tooth. Fourth mandibular tooth fitting into a notch in the upper jaw.
Teeth (17-17)/(15-15). Ventral armour not at all ossified (?). A large bony plate, composed of two pieces, occupying nearly the whole upper eyelid. Maxillo-premadary suture transverse, M-shaped. Palatines narrow, with parallel sides, not produced forward beyond the anterior end of the palatal fenestra. Pterygoid produced forward to meet the palatines. Pterygoids fused, with no trace of suture. Frontal entering the supratemporal fosss, which are small and anteriorly situated.
Intermediate between Osteolaemus Cope and Crocodylus Laurenti. Related to Crocodylus by the absence of the bony nasal septum. Related to Osteolaemus by a number of minor characters: (1) conformation and pitting of the posterior part of the skull; (2) large bony plate in eyelid, in two pieces; (3) number of teeth; (4) palatine extending no further forward than the palatal fenestra.
Distinguished from both Crocodylus and Osteolaemus by the entrance of the frontal into the supratemporal fossae. None of the crocodile skulls accessible to the writer has the pterygoids completely fused as in the specimen of the new form.
Externally scarcely distinguished from Osteolaemus tetraspis Cope, except by the flatter and slenderer snout (Fig. 2). 
CommentBrochu (2007) recognized O. osborni as a distinct taxonomic unit based on variations in four cranial characters that appear to be fixed between western Africa and the Congo Basin. 
References
  • Barnett, Linda K. & Emms, Craig 2005. Common reptiles of The Gambia. Rare Repro, Hailsham, East Sussex, 24 pp.
  • Bocage,J.V. du B. 1866. Lista dos reptis das possessões portuguezas d'Africa occidental que existem no Museu Lisboa. Jorn. Sci. Math. Phys. Nat. Lisboa 1: 37-56 - get paper here
  • Böhme, Wolfgang, Mark-Oliver Rödel, Christian Brede & Philipp Wagner 2011. The reptiles (Testudines, Squamata, Crocodylia) of the forested southeast of the Republic Guinea (Guinée forestière), with a country-wide checklist. Bonn zoological Bulletin 60 (1): 35-61 - get paper here
  • Boulenger, G.A. 1889. Catalogue of the chelonians, rhynchocephalians, and crocodiles in the British Museum (Natural History). British Museum, London, 311 pp. - get paper here
  • Brochu, C.A. 2007. Morphology, relationships, and biogeographical significance of an extinct horned crocodile (Crocodylia, Crocodylidae) from the Quaternary of Madagascar. Zool. J. Linnean Soc. 150 (4), 835–863 - get paper here
  • Carlino, P. & Pauwels, O.S.G. 2015. An Updated Reptile List of Ivindo National Park, the Herpetofaunal Hotspot of Gabon. Bull. Chicago Herp. Soc. 50(3): 25-39 - get paper here
  • Ceríaco, Luis Miguel Pires; Sango dos Anjos Carlos de Sá, Aaron M. Bauer 2018. The genus Osteolaemus (Crocodylidae) in Angola and a new southernmost record for the genus. Herpetology Notes 11: 337-341 - get paper here
  • Chirio, L. & Lebreton, M. 2007. Atlas des reptiles du Cameroun. MNHN, IRD, Paris 688 pp.
  • Cope, E.D. 1861. Recent species of Emydosaurian reptiles represented in the Museum of the Academy. Proc. Acad. Nat. Sci. Philadelphia1860: 549-551 - get paper here
  • Eaton, Mitchell J.;Andrew Martin, John Thorbjarnarson, George Amato 2009. Species-level diversification of African dwarf crocodiles (Genus Osteolaemus): A geographic and phylogenetic perspective. Molecular Phylogenetics and Evolution 50 (3): 496-506 - get paper here
  • Eniang, Edem A.; Godfrey C. Akani, Daniele Dendi, John E. Fa & Luca Luiselli 2020. People’s perceptions of crocodiles in Nigeria. The Herpetological Journal 30: 112-116 - get paper here
  • Fuchs, K., R. Mertens, and H. Wermuth. 1974. Zum Status vom Crocodylus cataphractus und Osteolaemus tetraspis. Stuttgarter Beiträge zur Naturkunde. Serie A (Biologie) 266: 1-8
  • Gossmann, V.; Lötters, S.; Obame, F. & Böhme, W. 2002. Zur Herpetofauna Gabuns. Teil II: Kommentierte Artenliste der gefundenen Reptilien, Bemerkungen zur Artenvielfalt. Herpetofauna 24 (136): 19-33 - get paper here
  • Gray, J. E. 1870. Note on the Black Crocodile of Africa. Ann. Mag. Nat. Hist. (4) 6: 427 - get paper here
  • Gray,J.E. 1867. Transact. zool. Soc. London, 6: 153.
  • Helfernberger, N. 1981. Ein Beitrag zur Fortpflanzungsbiologie von Osteolaemus t. tetraspis. Herpetofauna 3 (11): 9-11 - get paper here
  • Hoogmoed, M.S. 1980. Herpetologische waarnemingen in Ghana [part 8]. Lacerta 38 (10-11): 112-116 - get paper here
  • Inger, Robert F. 1948. The systematic status of the crocodile Osteoblepharon osborni. Copeia 1948 (1): 15-19 - get paper here
  • King, F. Wayne & Burke, Russel L. 1989. Crocodilian, Tuatara, and Turtles Species of the World: A Taxonomic and Geographic Reference. [type catalogue] Assoc. Syst. Coll., Washington, DC, xxii + 216 pp.
  • Kofron, C.P. & C. Steiner 1994. Observations on the African dwarf crocodile, Osteolaemus tetraspis Copeia 1994 (2): 533-535. - get paper here
  • Lilljeborg, W. 1867. Description of Halcrosia afzelii, a new crocodile from Sierra Leone, West Africa. Proc. zool. Soc. London 1867: 715-718 - get paper here
  • Marques, Mariana P.; Luis M. P. Ceríaco , David C. Blackburn , and Aaron M. Bauer 2018. Diversity and Distribution of the Amphibians and Terrestrial Reptiles of Angola -- Atlas of Historical and Bibliographic Records (1840–2017). Proc. Cal. Acad. Sci. (Ser. 4) 65: 1-501 (Supplement II)
  • Merchant, Mark, Shirley, Matthew H. and Watson, Charles M. 2016. Paleosuchus spp. (Dwarf Caiman) and Osteolaemus spp (Dwarf Crocodile) Defense mechanisms. Herpetological Review 47 (4): 660-663 - get paper here
  • Miles, Lee G.; Stacey L. Lance; Sally R. Isberg; Chris Moran; Travis C. Glenn 2009. Cross-species amplification of microsatellites in crocodilians: assessment and applications for the future. Conservation Genetics. 10:935–954 - get paper here
  • Monard, ALBERT 1940. Résultats de la mission du Dr. Monard en Guinée Portugaise 1937 – 1938. Arq. Mus. Bocage, Lisbon 11: 147-182
  • Murray, A. 1862. Description of Crocodilus frontatus, a new crocodile from Old Calabar River, West Africa. Proc. zool. Soc. London 1862: 213-218 - get paper here
  • Murray, A. 1862. Description of Crocodilus frontatus, a new crocodile from Old Calabar River, West Africa. Ann. Mag. Nat. Hist. (3) 11: 222-227 - get paper here
  • PAN, TAO; JIA-SHUN MIAO, HUA-BIN ZHANG, PENG YAN, PING-SHIN LEE, XIN-YUE JIANG, JIA-HUI OUYANG, YOU-PENG DENG, BAO-WEI ZHANG & XIAO-BING WU. 2021. Near-complete phylogeny of extant Crocodylia (Reptilia) using mitogenome-based data. Zoological Journal of the Linnean Society 191(4): 1075–1089. - get paper here
  • Pauwels O. S.G., Carlino P., Chirio L., Daversa D.R., Lips J., Oslisly Richard, Testa O. 2019. Amphibians and reptiles found in caves in Gabon, western Equatorial Africa. Cave and Karst Science, 46 (1): 3-12 - get paper here
  • Pauwels OSG, Morelle S, Albert J-L, Carlino P, Rahola N, Trape J-F. 2019. New reptile records from Lékédi Park and Haut-Ogooué Province, southeastern Gabon. Amphibian & Reptile Conservation 13 (1) [General Section]: 143–161 (e174) - get paper here
  • Pauwels, O. S. G. B. Le Garff, I. Ineich, P. Carlino, I. Melcore, L. Boundenga, C. Vigna, T. Stévart, K. Jeffery, C. Orbell, J.-B. Squarcini, J. P. Vande weghe and L. J. T. White 2016. Miscellanea Herpetologica Gabonica V & VI. Bull. Chicago Herp. Soc. 51: 177 - get paper here
  • Pauwels, O.S.G. & Vande Weghe, J.P. 2008. Les reptiles du Gabon. Smithsonian Institution, Washington: 272 pp. - get paper here
  • Pauwels, O.S.G.; Kamdem Toham, A. & Chimsunchart, C. 2002. Recherches sur l’herpétofaune du Massif du Chaillu, Gabon. Bull. Inst. Roy. Sci. Nat. Belgique (Biologie) 72: 47-57 - get paper here
  • Pauwels, Olivier S. G.; Laila Bahaa-el-din , Jean-Louis Albert , Piero Carlino , Francesco Giannuzzi , Laurent Chirio , Jean-François Gillet , Eddy Poirier and Tariq Stévart 2018. Miscellanea Herpetologica Gabonica XIV. Bulletin of the Chicago Herpetological Society 53(9): 185-190 - get paper here
  • Piras, Paolo; Luciano Teresi; Angela D. Buscalioni and Jorge Cubo 2009. The shadow of forgotten ancestors differently constrains the fate of Alligatoroidea and Crocodyloidea. Global Ecology and Biogeography (Global Ecol. Biogeogr.) 18: 30–40 - get paper here
  • Ray, D.A.; White, P.S.; Duong, H.V.; Cullin, T.; Densmore, L.D. 2000. High levels of genetic variability in West African dwarf crocodiles Osteolaemus tetraspis tetraspis. In Crocodilian Biology and Evolution, edited by G. Grigg, F. Seebacher, and C.F. Franklin. Surrey Beatty and Sons, Sydney, New South Wales, Australia.
  • Richter, U. 1981. Eine Nachzucht des Stumpfkrokodils (Osteolaemus tetraspis) (Reptilia: Crocodylia: Crocodylidae). Salamandra 17 (3-4): 194-197 - get paper here
  • Riley, J. & F.W. Huchzermeyer 2000. Diet and Lung Parasites of Swamp Forest Dwarf Crocodiles (Osteolaemus tetraspis osborni) in the Northern Congo Republic Copeia 2000 (2): 582-586. - get paper here
  • Roos, Jonas; Ramesh K. Aggarwal, Axel Janke 2007. Extended mitogenomic phylogenetic analyses yield new insight into crocodylian evolution and their survival of the Cretaceous–Tertiary boundary. Molecular Phylogenetics and Evolution 45: 663–673 - get paper here
  • Ross, Franklin D. 2006. Schmidt dwarf-croc safe temporarily. Crocodile Specialist Group Newsletter 25(2):18
  • Ross, Franklin D. 2006. Osteolaemus syntype headcount requested. Crocodile Specialist Group Newsletter 25(1):21. [
  • Ross, Franklin D. 2006. African dwarf-croc quandary persists. Crocodile Specialist Group Newsletter 25(1):19-21. [
  • Schmidt, Karl Patterson 1919. Contributions to the Herpetology of the Belgian Congo based on the Collection of the American Congo Expedition, 1909-1915. Part I: turtles, crocodiles, lizards, and chamaeleons. Bull. Amer. Mus. Nat. Hist. 39 (2): 385-624 - get paper here
  • Sommerlad, R. 2011. Krokodile – Reptiliengiganten in Gefahr. Reptilia (Münster) 16 (87): 16-22 - get paper here
  • Spawls, S.; Howell, K.; Drewes, R.C. & Ashe, J. 2002. A field guide to the reptiles of East Africa. Academic Press, 543 pp. [reviews in HR 34: 396 and Afr. J. Herp. 51; 147] - get paper here
  • Spawls, Steve; Kim Howell, Harald Hinkel, Michele Menegon 2018. Field Guide to East African Reptiles. Bloomsbury, 624 pp. - get paper here
  • Trape, J.F.; Trape, S. & Chirio, L. 2012. Lézards, crocodiles et tortues d'Afrique occidentale et du Sahara. IRD Orstom, 503 pp. - get paper here
  • Trutnau, L. & Sommerlad, R. 2006. Krokodile - Biologie und Haltung. Edition Chimaira, Frankfurt, 646 pp. [review in Reptilia Münster 11 (6): 95-96]
  • Trutnau, L. & Sommerlad, R. 2006. Crocodilians. Their natural history and captive husbandry. Edition Chimaira, Frankfurt, 646 pp. [review in Reptilia GB 48: 8-10]
  • Wermuth, H. 1953. Systematik der Rezenten Krokodile. Mitteilungen aus dem Zoologischen Museum im Berlin 29 (2): 375-514 - get paper here
  • Wermuth, H., and R. Mertens. 1961. Schildkröten, Krokodile, Brückenechsen. Gustav Fischer Verlag, Jena. xxvi + 422 pp.
  • Wermuth,H. & Fuchs,K. 1978. Bestimmen von Krokodilen und ihrer Häute. Gustav Fischer Verlag, Stuttgart - New York, 100 pages, [ISBN 3-437-30268-X]
  • Willis, Ray E. 2009. Transthyretin gene (TTR) intron 1 elucidates crocodylian phylogenetic relationships. Molecular Phylogenetics and Evolution 53 (3): 1049-1054 - get paper here
  • Ziegler, Thomas; Anna Rauhaus, Fabian Schmidt 2017. Review of Crocodiles in Zoological Gardens with a focus on Europe. Zool. Garten N.F. - get paper here
 
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