Boletín de la Sociedad Geológica Mexicana ISSN: 1405-3322 Sociedad Geológica Mexicana, A.C.
Rivera-Sylva, Héctor E.; Frey, Eberhard; Stinnesbeck, Wolfgang; Amezcua, Natalia; Flores Huerta, Diana First occurrence of Parksosauridae in Mexico, from the Cerro del Pueblo Formation (Late Cretaceous; late Campanian) at Las Águilas, Coahuila Boletín de la Sociedad Geológica Mexicana, vol. 70, no. 3, 2018, pp. 779-785 Sociedad Geológica Mexicana, A.C.
DOI: https://doi.org/10.18268/BSGM2018v70n3a10
Available in: https://www.redalyc.org/articulo.oa?id=94358881010
How to cite Complete issue Scientific Information System Redalyc More information about this article Network of Scientific Journals from Latin America and the Caribbean, Spain and Journal's webpage in redalyc.org Portugal Project academic non-profit, developed under the open access initiative http://dx.doi.org/10.18268/BSGM2018v70n3a10 P. 779‒784 VOL. 70NO. 3 BOL. SOC.GEOL.MEX.2018 Ángeles km9.5-4,Pachuca, Hgo., México. Servicio GeológicoMexicano, Blvd. Felipe Huerta Diana Flores Natalia Amezcua 69120 Heidelberg, Germany. Heidelberg, ImNeunheimerFeld 234-236, Institut fürGeowissenschaften, Universität Wolfgang Stinnesbeck ny. prinzenstraße 13, D76133Karlsruhe, Germa sruhe, Geowissenschaftliche Abteilung, Erb Staatliches MuseumfürNaturkunde Karl Eberhard Frey Saltillo, Coah.,México. Desierto, Carlos Abedrop Dávila3745,25022, de Paleontología,Departamento Museo del [email protected] Héctor E.Rivera-Sylva Héctor E. Formation (LateCretaceous;lateCampanian)atLasÁguilas,Coahuila occurrence of ParksosauridaeinMexico,from First theCerrodelPueblo Short note Manuscript February accepted: 18,2018. Corrected manuscript received: February 13,2018. Manuscript received: January 30,2018. Rivera-Sylva , Eberhard - - - Frey Campanian, Coahuila,México. Formation, Parksosauridae, Keywords: Cerro del Pueblo enigmatic familyinMéxico. this represents occurrence of the first by usto Parksosauridae. material The vertebral centrum. Both are assigned an isolated shallow amphicoelous an asymmetrically bulged crown and taxa. Here we present a tooth with several late Campanian dinosaur of both bonesandtrackwayscomprising is extremely rich infossil remains Porvenir de Jalpa, Coahuila, México, LasÁguilaslocalitynear The ABSTRACT , Wolfgang Boletín de la Sociedad Geológica Mexicana Geológica Sociedad la de Boletín Stinnesbeck , Natalia Amezcua de varios taxa Campanianos. Aquí presen dinosaurios comprendiendo huesos y huellas extremadamente rica en restos de fósiles de Jalpa,Porvenir Coahuila, México, es La localidad de Las Águilas cerca de RESUMEN México. Campaniano, Coahuila, del Pueblo, Parksosauridae, Palabras clave: Cerro Formación enigmática familia para México. material representade esta el primer registro dos por nosotros como Parksosauridae. El de unavértebra anficélica. Ambos asigna bulbosa y asimétrica además de un centrum de un diente con una coronatamos el registro , Diana Flores Huerta Flores /2018 779 - -
First occurrence of Parksosauridae in Mexico ABSTRACT INTRODUCTION / MATERIALS AND METHODS / First occurrence of Parksosauridae in Mexico SYSTEMATIC PALEONTOLOGY 780 780 1. Introduction dentition appear to be primitive within Ornithop (Bucholtz, 2002;Boyd,its skull and 2015).As phylogenetic relationshipwithin Ornithopoda dinosaurs, witha controversialsmall ornithischian Parksosauridae are familyof a little understood Mexicano, Pachuca, México. Karlsruhe, Germany; SMNK- Museo del Desierto, Saltillo, Coahuila, México; Nacional deAntropología eHistoria; delberg University, Germany; México; México; Paleontológica de Coahuila, Saltillo, Coahuila, Institutional Abbreviations (Figure 1). the Cerro del Pueblo Formation ico, in rocksof Méx Saltillo, Coahuila, north-eastern westkm of the hamlet Porvenir de Jalpa, and about 50 east of theLasÁguilaslocality, 2014,4.2kmeastof of remainsfound during thespring basal ornithopod in México. Here we describe the fossil remains to a the United States, while it was hitherto unknown Parksosauridaedocumented isfrom Canada and the teethcrowns iscrenulated andlacksserration. enamel of leaf-shaped teeth (Galton, 1997). The lingually curved and labiolingually compressed has and frontals flat with elongate is body,it the proportionally is skull The small withrespect to (Norman and Asia North America to Maastrichtian of the Aptian rial, lightly-built dinosaurs, whichare knownfrom Parksosauridae are small-bodied, bipedal, curso that family(Boyd, 2015). 1973; Butler and Galton, 2008), orequivalent to ( the Thescelosauridae member of either “hypsilophodontid”as (Sereno, 1998),a 1974a; Boyd, 2014), the family it has been grouped oda, much resembling hypsilophodontids (Galton, / Boletín de la Sociedad Geológica Mexicana Geológica Sociedad la de Boletín SaeMsu fNatural History, State of Museum CNA- IEUH- ConsejoNacional de Arqueología, Isiueo Earth Sciences, Hei Institute of et al. SGM- , 2004;Boyd Servicio Geológico : CPC- INAH- et al. e.g. Colección Instituto Galton, MUDE- , 2009). - - - - /2018 2. MaterialsandMethods 3. Systematicpaleontology and SGM. They are housed andcataloged at the bya jointteam from MUDE,SMNK,IEUH, lected during anextensive surfacesurvey2014 in fossilsdocumented hereThe at LA14were col green-to fine-grained, a buff-colored siltstone. of out weathered has Angostura. At LA 14, abundant surface material Cerro de new site located about 1.5 kmwest of isa 14), (LA 14” Águilas “Las number field the Parksosauridae, with localitywithremainsThe of byVogt Las Águilassectionhave recently been presented geology,The the stratigraphy,of andpaleoecology it fa premaxillary tooth crown, slightlylabi of sists Description – Jalpa, Coahuila,northeastMéxico(Figure 1). Locality – ure 2,C-H),aposteriorsacralvertebral centrum. A-B), a right premaxillarytooth; CPC 1866 (Fig specimens– Referred Oficio [CNA; Arqueología 401.B(4)19.2013/36/1862]. de Nacional sejo the INAH through itsCon of with permission specimensreported hereThe were collected Canon lens18–55mm,1:3.55.6ISII. mm, f/3.5); and a Canon EOS Rebel T2i with a macroZuiko f/3.5 –5.6),anOlympus lens(35 an Olympus Zuikostandard lens (14 – 42 mm, were E620with using anOlympus photographed The specimens institution. that at file on is tion Museo del Desierto (MUDE). Localityinforma Parksosauridae Bucholtz,2002 et al. Ornithischia Seeley,Ornithischia 1888 Cerapoda Sereno, 1986 Parksosauridae indet. LA 14near Las Águilas, Porvenir de (2016)andRivera-Sylva CPC 1872 (Figure 2, A-B) con CPC 1872 (Figure 2, et al . (2017). ------Figure 1 around itsmiddle. boneis 1.5timeslonger The whichshallowlyis amphicoelous andconstricted sacral, fifth the as interpreted centrum, vertebral CPC 1866 (Figure 2,C-H)aposterior is sacral 3mm. maximum diameterof crown2010). The height is 5 mm, with a basal root a shedtooth (Frey suggests and Monninger, the wear. absenceof The display of ahighdegree its tip, showing labial striations, a few coarse which curveda smallwear linguallyand bears facet on the crown isblunt. tooth crown The isslightly of the crown. tip The the labial only misses face of pronounced distallycompared to mesially, and is asymmetricallybulged. bulge The is twice as its base. to this constriction,the crown Apically olingually compressed and slightly constricted at Geographiclocationofin Coahuila,north-east thePorvernirdeJalpa,LasÁguilasfossilMéxico. site Boletín de la Sociedad Geológica Mexicana Geológica Sociedad la de Boletín 4. Discussion ing the blunt tip, the striations onthe lingual side, the premaxillary tooth face, includ shape of The and31mmwide.deep hourglass is aspect. It is 48mmlong,shaped indorsal 42mm canal the neural of floor The arch. theneural that accommodate the pedunclesof transverse with deep striae surface is ornamented and slightlyconvex lateral margins. dorsal The margin dorsal flat a ridge,with dorso-medial a by cranial outline and hasaconcave area separated terior views, the centrum is rounded triangular in and slightlyhigher than wide. Inanterior and pos /2018 781 781 - -
SYSTEMATIC PALEONTOLOGY / First occurrence of Parksosauridae in Mexico DISCUSSION First occurrence of Parksosauridae in Mexico DISCUSSION / CONCLUSIONS 782 782 view; (H)caudal view.ScaleinA-B:5mm;C-H:cm. cranial (G) view; dorsal (F) view; ventral (E) view; lateral right (D) view; lateral left (C) in: 1866) (CPC vertebra sacral Fifth lingualview. Figure 2 illustrated by and Seitz (2015; p. Carr 107) for 5) (Galton, 1974b) it much resembles vertebrae the series (sa. the posterior-most sacral element of concavity, as longitudinally vertebra this identifies nial view, towardsthe caudal face, andventrally Brown features seen only inthisgroup (Gilmore, 1915; the shallow platycoelous intervertebral joints are centrum acrosstheir middle circumferrence and for and sacralvertebraeThe of Jin rus the caseinneoornithischians also is on boththe anterior and posterior margins, which ( fromwith leaf-shape teeth other ornithischians differing thus 1940), Sternberg, 1926; (Parks, ing Boyd, 2014). In Thescelosaurus and the lingually curving blunt crown, are seen in the smooth lingual surface, the constricted base, / i.e. Parksosauridae fossils from theCerro delPueblo Formation. Arightpremaxillarytooth(CPC1872)in:(A)labialviewand, (B) Boletín de la Sociedad Geológica Mexicana Geológica Sociedad la de Boletín , , pachycephalosaurids). Serrations are absent et al. Hypsilophodon Haya Dysalotosaurus et al. , 2010;Makovicky , and , 2013). The widenedcentrum, incra , 2013).The and Jeholosaurus Parksosaurus (Galton, 1974b). The constricted (Galton, 1974b). The are verysimilar tothose reported Hypsilophodon Parksosaurus (Barrett and Han,2009; et al. , the premaxilla is miss , 2011). (Galton, 1974b; , Thescelosaurus Changchunsau - - - /2018 , 5. Conclusions oeyfo h otesenMxcnsaeo covery Mexican from state of the northeastern Parksosauridae inMéxico.dis This evidence of first the represents here described material The Utah; Gates from the Kaiparowitsbasal ornithopod Formation osteological remainsThese resemble an unnamed inthe Twooccurs MedicineFormation (Montana). North America, the late Campanian of only well-knownThe basal cerapoda taxon from 1987). sutural fusion (Gilmore, 1924;Sues and Galton, adult pachycephalosaurids, which show strong of 2007),contrastingwiththe vertebrae1996; Irmis, suggestiveis for animmature individual(Brochu, neurocentral suture must have been open, which centropeduncular articulation indicate that the have fallen off during diagenesis.The striae on the don Thescelosaurus . The neural arch. The not preserved is andmay et al. , andGalton (1974b) for , 2013. Orodromeus Hypsilopho - - , References Acknowledgements field research for NA and DFH. Iván Erick San Erick Iván DFH. and NA for research field Servicio Geológico MexicanoThe supported acknowledgedgratefully for providingliterature. Rubén Guzmán-Gutierrez (Aguascalientes) is and WS. EF, HR, of fieldwork the for structure Museo del Desierto in Saltillo provided the infra (Heidelberg), and Sven Wetzel (Heidelberg). The Susanne Stinnesbeck(Troisdorf), Manfred Vogt (Siegburg), Sarah Stinnesbeck (Karlsruhe), Eva sruhe), MelissaPerner (Heidelberg), Ulli Karas Linsler (Heidelberg), TimNiggemeyer (Karl (Karlsruhe),(Heidelberg), KristinaEck Aaron Felix Bayer (Heidelberg), Christiane Birnbaum in fieldwork in the Las Águilasarea: Lucía Alfaro (Saltillo), participation their for leagues We to wish thank the following friendsand col North America. sauridae forto the south of about 2000 kilometers Parkso range of Coahuila extends the geographic od .. 04 h rna ntm fthe Boyd, cranial anatomy C.A.,2014, The of Barrett, P.M.,F-L., 2009,Cranial Han, anatomy (STI128/24 and44). WS and (FR1314/19) EF for expenses fieldwork Forschungsgemeinschaft (DFG) covered travel and their reviewsand usefulcomments. Deutsche The and RodolfoCarpenter Coriaare thankedfor chez Uribe thanked foris image editing. Kenneth
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