{ "reviewed_at": "2026-10-10", "genus": "Zigongosaurus", "genusId": "66512", "decision": "Retain legalguess underPBDB genusclassification; maintain explicit hidden-answerhold, with identity/type/referral and speciesstatus documented. Do not forcibly synonymize withMamenchisaurus/Omeisaurus or promote tohiddenanswer.", "decision_is_game_eligibility_not_formal_taxonomic_act": true, "source_files_read": [ "audits/2026-10-10-mamenchisaurids/sources-c.json" ], "sources": [ { "id": "hou1976", "title": "Zigongosaurus Research Group (Hou, Zhou, Cao/Chao), 1976, New discovery of sauropod dinosaurs from Sichuan, Vertebrata PalAsiatica14(3):160–165", "url": "https://ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/200905/W020090813376971757825.pdf", "original_url": "https://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/200905/W020090813376971757825.pdf", "access": "Full original six-page scanned Chinese PDF downloaded successfully using HTTP www and HTTPS non-www; all six pages viewed as rendered images. pdftotext is empty. Original wwwHTTPS failed502; non-www succeeds.", "local_file": "/workspace/scratch/df61339eaede/zigong1976.pdf", "sha256": "426dfbf91b1abaae214574f3ba17ef61170af0e8e4fb0b7e8491e17f74c40c72", "evidence": [ "Printed160 names Zigongosaurus fuxiensis and gives Chongqing museum specimen number02501. It discusses the whole mounted specimen; it does not give CV00261 as a partial-skull type.", "Printed163 explicitly states prepared material represents at least four individuals, including cranial material, and that one fourteen-metre medium-sized individual was mounted.", "Printed160/161 locates horizon above the conchostracan-bearing upper/lower Shaximiao boundary. Original authors conclude early LateJurassic on printed165. Original formation and age interpretation should be reported historically, not as newly measured age." ], "web_ref": "turn376search51" }, { "id": "dong1983", "title": "Dong, Zhou and Zhang1983, Dinosaurs from Jurassic of Sichuan, Palaeontologia Sinica NewSeriesC23", "url": "https://naturalhistory.si.edu/sites/default/files/media/translated_publications/Dong%26amp%3B_83.pdf", "access": "Full Smithsonian-hosted English translation inspected; printed29–32 and52–54 (PDF36–40/59–61).", "web_ref": "turn365view1", "evidence": [ "Much Wujiaba material originally assigned to Zigongosaurus was reassigned to Omeisaurus junghsiensis through comparison. Wujiaba collection includes13–16 individuals; composite mounts CV226 andZMSI001 are selected as hypodigms.", "Omeisaurus fuxiensis is a NEW species based on CV00267, consisting of basioccipital, toothed maxilla, leftdentary andaxis; formerZigongosaurus paratype maxilla contributes to it. Distinct nominaltypes, no objective synonymy established just from epithet.", "Authors recognize two distinct taxa among Wujiaba material and acknowledge uncertainty about individual/ontogenetic variation. Single maxilla excluded from general referral toOmeisaurus." ] }, { "id": "peng2005", "title": "Peng, Ye, Gao, Shu andJiang2005, Jurassic Dinosaur Faunas in Zigong, Sichuan People’s Publishing House", "url": "https://www.yumpu.com/en/document/view/11867570/jurassic-dinosaur-faunas-in-zigong-", "access": "Primary monograph English synopsis fully exposed on mirror. Relevant Omeisaurus/Zigongosaurus systematic sections inspected; original Chinese body not exposed.", "web_ref": "turn373view0", "evidence": [ "Lists Zigongosaurus as separategenus; holotypeCV02501 a composite skeleton with incomplete skull; paratype another composite skeleton housedZigong SaltHistoryMuseum.", "Omeisaurus fuxiensis has separateholotypeCV00267, Wujiaba/UpperShaximiao.", "Do not translate “composite” into a formal nomen dubium by itself; it establishes association/referral limits." ] }, { "id": "li2011", "title": "Li,Liu,Yang,Hu2011, Dinosaur assemblages from Middle Jurassic Shaximiao andChuanjie formations, VoluminaJurassica9:21–42", "url": "https://vjs.pgi.gov.pl/article/download/26567/18275/39914", "access": "Full publisher PDF inspected; printed24 includes explicit Mamenchisaurus fuxiensis(=Zigongosaurus fuxiensis)Hou1976, separately Omeisaurus fuxiensisDong1983.", "web_ref": "turn391view0" }, { "id": "wang2019_metadata", "title": "Wang,Norell,Pei,Ye,Chang2019, Surprisingly young age for the mamenchisaurid sauropods inSouthChina, CretaceousResearch104:104176", "doi": "10.1016/j.cretres.2019.07.006", "url": "https://www.sciencedirect.com/science/article/pii/S0195667119300333", "access": "Publisher abstract and institutional metadata only. Full article NOT independently inspected; HKU explicitly has no associated fulltextfile. Its doubtfulspecies opinion is recorded by PBDB opn831924, which IS independently captured.", "web_ref": "turn394search0" }, { "id": "wei2025", "title": "Wei etal.2025, A new mamenchisaurid from UpperJurassic SuiningFormation ... ScientificReports15:24808", "doi": "10.1038/s41598-025-09796-0", "url": "https://www.nature.com/articles/s41598-025-09796-0.pdf", "access": "Full PMC HTML successfully downloaded by shell; comparisons anddiscussion inspected; full publisherPDF exposedweb.", "local_file": "/workspace/scratch/df61339eaede/tongnan2025.html", "web_ref": "turn395view2", "evidence": [ "Explicitly compares Tongnanlong to Zigongosaurus fuxiensis, specimensZDM00251;CQMNHCV025011. Scapula andcoracoid distinctions specified.", "Lists Zigongosaurus independently among Chinese mamenchisaurid genera. This is positive latestusage supporting retainedgenus, not a new formal revisional diagnosis resolving oldmixedseries.", "ModernCV025011 andZDM00251 numbers differ from1976/2005; do not silently equate museum renumberings without a catalog concordance." ] } ], "pbdb": { "capture_date": "2026-10-10", "genus": "txn66512 acceptedgenus underMamenchisauridae;0genuslinkedoccurrences.", "classified_genus_opinion": "opn899716 Peng2005 belongs toMamenchisauridae; superseded synonymsOmei1983/1990/1992,Mamenchi1996/2002/2004/2011 remainhistorical.", "type_species": "txn56465 originalcombinationZigongosaurus fuxiensis; recombinedMamenchisaurus fuxiensis var56466; classifiedopinion831924 sta=nomen dubium, Wang2019/ref76407; acceptedSauropoda,1occurrence.", "different_named_species": "Omeisaurus fuxiensis Dong1983 txn65668 distinct fromHou1976 type species.", "raw_captures": { "validtaxon": { "elapsed_time": 0.00212, "records": [ { "oid": "txn:66512", "flg": "B", "rnk": "genus", "nam": "Zigongosaurus", "att": "Hou et al. 1976", "par": "txn:53026", "prl": "Mamenchisauridae", "aut": "Hou et al.", "pby": "1976", "rid": "ref:13842", "ext": "0", "noc": 0, "siz": 1, "exs": 0, "phl": "Chordata", "cll": "Saurischia", "odl": "NO_ORDER_SPECIFIED", "fml": "Mamenchisauridae", "gnl": "Zigongosaurus", "ttl": "Mamenchisaurus fuxiensis", "jev": "terrestrial", "jevb": "Sauropoda", "jmo": "actively mobile", "jmob": "Sauropoda", "jlh": "ground dwelling, gregarious", "jlhb": "Sauropoda", "jdt": "herbivore", "jdtb": "Sauropoda", "jre": "oviparous, dispersal=direct/internal,mobile", "jreb": "Sauropoda", "jon": "accretion,modification of parts", "jonb": "Sauropoda", "jco": "hydroxyapatite", "jsa": "compact or dense", "jth": "thick", "jtpb": "Sauropoda" } ] }, "opinions": { "elapsed_time": 0.00698, "records": [ { "oid": "opn:899716", "otp": "C", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "belongs to", "prl": "Mamenchisauridae", "par": "txn:53026", "pva": "var:53026", "spl": "original spelling", "oat": "Peng et al.", "opy": "2005", "aut": "Peng et al.", "pby": "2005", "rid": "ref:82845", "ref": "G. Peng, Y. Ye, and Y. Gao, C. Shu, S. Jiang. 2005. Zìgòng dìqū zhū luó jì kǒnglóng dòngwù qún [Jurassic Dinosaur Faunas in Zigong]." }, { "oid": "opn:881693", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "original spelling", "oat": "Li et al.", "opy": "2011", "aut": "Li et al.", "pby": "2011", "rid": "ref:46452", "ref": "K. Li, J. Liu, and C. Yang, F. Hu. 2011. Dinosaur assemblages from the Middle Jurassic Shaximiao Formation and Chuanjie Formation in the Sichuan-Yunnan Basin, China. Volumina Jurassica 9:21-42" }, { "oid": "opn:108659", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "original spelling", "oat": "Upchurch et al.", "opy": "2004", "aut": "Upchurch et al.", "pby": "2004", "rid": "ref:16552", "ref": "P. Upchurch, P. M. Barrett, and P. Dodson. 2004. Sauropoda. The Dinosauria (2nd edition). University of California Press, Berkeley" }, { "oid": "opn:112946", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "original spelling", "oat": "Ouyang and Ye", "opy": "2002", "aut": "Ouyang and Ye", "pby": "2002", "rid": "ref:16721", "ref": "H. Ouyang and Y. Ye. 2002. The first mamenchisaurian skeleton with complete skull: Mamenchisaurus youngi. Sichuan Science and Technology Press, Chengdu" }, { "oid": "opn:100731", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "belongs to", "prl": "Euhelopodinae", "par": "txn:54867", "spl": "original spelling", "oat": "Martin-Rolland", "opy": "1999", "aut": "Martin-Rolland", "pby": "1999", "rid": "ref:14475", "ref": "V. Martin-Rolland. 1999. Les sauropodes chinois [The Chinese sauropods]. Revue Paléobiologie, Genève 18(1):287-315" }, { "oid": "opn:96425", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "original spelling", "oat": "Zhang and Chen", "opy": "1996", "aut": "Zhang and Chen", "pby": "1996", "rid": "ref:9731", "ref": "Y. Zhang and W. Chen. 1996. Preliminary research on the classification of sauropods from Sichuan Basin, China. The Continental Jurassic. Museum of Northern Arizona Bulletin 60:97-107" }, { "oid": "opn:96424", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Omeisaurus", "par": "txn:38702", "spl": "original spelling", "oat": "Dong", "opy": "1992", "aut": "Dong", "pby": "1992", "rid": "ref:13360", "ref": "Z. Dong. 1992. Dinosaurian Faunas of China. China Ocean Press, Beijing" }, { "oid": "opn:345064", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Omeisaurus", "par": "txn:38702", "spl": "original spelling", "oat": "McIntosh", "opy": "1990", "aut": "McIntosh", "pby": "1990", "rid": "ref:36737", "ref": "J. S. McIntosh. 1990. Sauropoda. The Dinosauria. University of California Press, Berkeley" }, { "oid": "opn:247593", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "belongs to", "prl": "Mamenchisauridae", "par": "txn:53026", "pva": "var:53026", "spl": "original spelling", "oat": "He et al.", "opy": "1988", "aut": "He et al.", "pby": "1988", "rid": "ref:28519", "ref": "X. He, K. Li, and K. Cai. 1988. The Middle Jurassic dinosaur fauna from Dashanpu, Zigong, Sichuan. Vol. IV. Sauropod dinosaurs (2). Omeisaurus tianfuensis. Sichuan Publishing House of Science and Technology" }, { "oid": "opn:101111", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "belongs to", "prl": "Mamenchisauridae", "par": "txn:53026", "pva": "var:53026", "spl": "original spelling", "oat": "He", "opy": "1984", "aut": "He", "pby": "1984", "rid": "ref:14527", "ref": "X. He. 1984. The Vertebrate Fossils of Sichuan. Sichuan Scientific and Technological Publishing House, Chengdu" }, { "oid": "opn:132408", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "subjective synonym of", "prl": "Omeisaurus", "par": "txn:38702", "spl": "original spelling", "oat": "Dong et al.", "opy": "1983", "aut": "Dong et al.", "pby": "1983", "rid": "ref:17258", "ref": "Z. Dong, S. Zhou, and H. Zhang. 1983. [Dinosaurs from the Jurassic of Sichuan]. Palaeontologica Sinica, New Series C, Whole Number 162(23):1-136" }, { "oid": "opn:96423", "otp": "U", "rnk": 5, "nam": "Zigongosaurus", "tid": "txn:66512", "vid": "var:66512", "sta": "belongs to", "prl": "Bothropodidae", "par": "txn:100395", "pva": "var:54845", "spl": "original spelling", "oat": "Hou et al.", "opy": "1976", "aut": "Hou et al.", "pby": "1976", "rid": "ref:13842", "ref": "L.-h. Hou, S.-w. Zhou, and S.-c. Chao. 1976. [New discovery of sauropod dinosaurs from Sichuan]. Vertebrata PalAsiatica 14(3):160-165" } ] }, "species": { "elapsed_time": 0.0033, "records": [ { "oid": "txn:56465", "flg": "V", "rnk": 3, "nam": "Zigongosaurus fuxiensis", "att": "(Hou et al. 1976)", "tdf": "nomen dubium, species not entered", "acc": "txn:38653", "acr": 25, "acn": "Sauropoda", "par": "txn:38653", "prl": "Sauropoda", "aut": "Hou et al.", "pby": "1976", "rid": "ref:13842", "ext": "0", "noc": 1, "fea": 168.2, "fla": 161.5, "lea": 168.2, "lla": 161.5, "tei": "Bathonian", "tli": "Callovian", "siz": 0, "exs": 0, "phl": "Chordata", "cll": "Saurischia", "odl": "NO_ORDER_SPECIFIED", "fml": "NO_FAMILY_SPECIFIED", "gnl": "NO_GENUS_SPECIFIED", "jev": "terrestrial", "jevb": "Sauropoda", "jmo": "actively mobile", "jmob": "Sauropoda", "jlh": "ground dwelling, gregarious", "jlhb": "Sauropoda", "jdt": "herbivore", "jdtb": "Sauropoda", "jre": "oviparous, dispersal=direct/internal,mobile", "jreb": "Sauropoda", "jon": "accretion,modification of parts", "jonb": "Sauropoda", "jco": "hydroxyapatite", "jsa": "compact or dense", "jth": "thick", "jtpb": "Sauropoda" } ] }, "species-opinions": { "elapsed_time": 0.0133, "records": [ { "oid": "opn:831924", "otp": "C", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "vid": "var:56466", "sta": "nomen dubium", "prl": "Sauropoda", "par": "txn:38653", "spl": "recombination", "oat": "Wang et al.", "opy": "2019", "aut": "Wang et al.", "pby": "2019", "rid": "ref:76407", "ref": "J. Wang, M. A. Norell, and R. Pei, Y. Ye, S.-C. Chang. 2019. Surprisingly young age for the mamenchisaurid sauropods in South China. Cretaceous Research 104:104176:1-9" }, { "oid": "opn:709437", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "vid": "var:56466", "sta": "belongs to", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "recombination", "oat": "Maisch and Matzke", "opy": "2019", "aut": "Maisch and Matzke", "pby": "2019", "rid": "ref:67888", "ref": "M. W. Maisch and A. T. Matzke. 2019. First record of a eusauropod (Dinosauria: Sauropoda) from the Upper Jurassic Qigu-Formation (southern Junggar Basin, China), and a reconsideration of Late Jurassic sauropod diversity in Xinjiang. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 291(1):109-117" }, { "oid": "opn:881692", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "vid": "var:56466", "sta": "belongs to", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "recombination", "oat": "Li et al.", "opy": "2011", "aut": "Li et al.", "pby": "2011", "rid": "ref:46452", "ref": "K. Li, J. Liu, and C. Yang, F. Hu. 2011. Dinosaur assemblages from the Middle Jurassic Shaximiao Formation and Chuanjie Formation in the Sichuan-Yunnan Basin, China. Volumina Jurassica 9:21-42" }, { "oid": "opn:631122", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Xing et al.", "opy": "2009", "aut": "Xing et al.", "pby": "2009", "rid": "ref:60851", "ref": "L.-d. Xing, H. Dong, and G.-z. Peng, C.-k. Shu, X.-d. Hu, H. Jiang. 2009. A scapular fracture in Yangchuanosaurus hepingensis (Dinosauria: Theropoda). Geological Bulletin of China 28(10):1390-1395" }, { "oid": "opn:835748", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "nomen nudum", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Xing et al.", "opy": "2009", "aut": "Xing et al.", "pby": "2009", "rid": "ref:76759", "ref": "L. Xing, Y. Ye, and C. Shu, G. Peng, H. You. 2009. Structure, orientation and FInite Element Analysis of the tail club of Mamenchisaurus hochuanensis. Acta Geologica Sinica 83(6):1031-1040" }, { "oid": "opn:278934", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "vid": "var:56466", "sta": "belongs to", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "recombination", "oat": "Lü et al.", "opy": "2008", "aut": "Lü et al.", "pby": "2008", "rid": "ref:30692", "ref": "J. Lü, T. Li, and S. Zhong, Q. Ji, S. Li. 2008. A new mamenchisaurid dinosaur from the Middle Jurassic of Yuanmou, Yunnan Province, China. Acta Geologica Sinica 82(1):17-26" }, { "oid": "opn:899717", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Peng et al.", "opy": "2005", "aut": "Peng et al.", "pby": "2005", "rid": "ref:82845", "ref": "G. Peng, Y. Ye, and Y. Gao, C. Shu, S. Jiang. 2005. Zìgòng dìqū zhū luó jì kǒnglóng dòngwù qún [Jurassic Dinosaur Faunas in Zigong]." }, { "oid": "opn:108664", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "vid": "var:56466", "sta": "belongs to", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "recombination", "oat": "Upchurch et al.", "opy": "2004", "aut": "Upchurch et al.", "pby": "2004", "rid": "ref:16552", "ref": "P. Upchurch, P. M. Barrett, and P. Dodson. 2004. Sauropoda. The Dinosauria (2nd edition). University of California Press, Berkeley" }, { "oid": "opn:100706", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Martin-Rolland", "opy": "1999", "aut": "Martin-Rolland", "pby": "1999", "rid": "ref:14475", "ref": "V. Martin-Rolland. 1999. Les sauropodes chinois [The Chinese sauropods]. Revue Paléobiologie, Genève 18(1):287-315" }, { "oid": "opn:78040", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "vid": "var:56466", "sta": "belongs to", "prl": "Mamenchisaurus", "par": "txn:38670", "spl": "recombination", "oat": "Zhang and Chen", "opy": "1996", "aut": "Zhang and Chen", "pby": "1996", "rid": "ref:9731", "ref": "Y. Zhang and W. Chen. 1996. Preliminary research on the classification of sauropods from Sichuan Basin, China. The Continental Jurassic. Museum of Northern Arizona Bulletin 60:97-107" }, { "oid": "opn:345065", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "subjective synonym of", "prl": "Omeisaurus junghsiensis", "par": "txn:56461", "spl": "original spelling", "oat": "McIntosh", "opy": "1990", "aut": "McIntosh", "pby": "1990", "rid": "ref:36737", "ref": "J. S. McIntosh. 1990. Sauropoda. The Dinosauria. University of California Press, Berkeley" }, { "oid": "opn:247589", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "He et al.", "opy": "1988", "aut": "He et al.", "pby": "1988", "rid": "ref:28519", "ref": "X. He, K. Li, and K. Cai. 1988. The Middle Jurassic dinosaur fauna from Dashanpu, Zigong, Sichuan. Vol. IV. Sauropod dinosaurs (2). Omeisaurus tianfuensis. Sichuan Publishing House of Science and Technology" }, { "oid": "opn:461868", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Zhao", "opy": "1985", "aut": "Zhao", "pby": "1985", "rid": "ref:46057", "ref": "X. Zhao. 1985. [The Jurassic Reptilia]. [The Jurassic System of China. Stratigraphy of China, No. 11]" }, { "oid": "opn:101112", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "He", "opy": "1984", "aut": "He", "pby": "1984", "rid": "ref:14527", "ref": "X. He. 1984. The Vertebrate Fossils of Sichuan. Sichuan Scientific and Technological Publishing House, Chengdu" }, { "oid": "opn:132409", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "subjective synonym of", "prl": "Omeisaurus junghsiensis", "par": "txn:56461", "spl": "original spelling", "oat": "Dong et al.", "opy": "1983", "aut": "Dong et al.", "pby": "1983", "rid": "ref:17258", "ref": "Z. Dong, S. Zhou, and H. Zhang. 1983. [Dinosaurs from the Jurassic of Sichuan]. Palaeontologica Sinica, New Series C, Whole Number 162(23):1-136" }, { "oid": "opn:259317", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Dong et al.", "opy": "1978", "aut": "Dong et al.", "pby": "1978", "rid": "ref:29352", "ref": "Z. Dong, Y. Zhang, and X. Li, S. Zhou. 1978. [A new carnosaur from Yongchuan County, Sichuan Province]. Ke Xue Tong Bao [Science Newsletter] 23(5):302-304" }, { "oid": "opn:96422", "otp": "U", "rnk": 3, "nam": "Mamenchisaurus fuxiensis", "tid": "txn:56465", "cnm": "Zigongosaurus fuxiensis", "vid": "var:56465", "sta": "belongs to", "prl": "Zigongosaurus", "par": "txn:66512", "spl": "original spelling", "oat": "Hou et al.", "opy": "1976", "aut": "Hou et al.", "pby": "1976", "rid": "ref:13842", "ref": "L.-h. Hou, S.-w. Zhou, and S.-c. Chao. 1976. [New discovery of sauropod dinosaurs from Sichuan]. Vertebrata PalAsiatica 14(3):160-165" } ] }, "omei": { "elapsed_time": 0.00286, "records": [ { "oid": "txn:65668", "rnk": 3, "nam": "Omeisaurus fuxiensis", "att": "Dong et al. 1983", "par": "txn:38702", "prl": "Omeisaurus", "aut": "Dong et al.", "pby": "1983", "rid": "ref:17258", "ext": "0", "noc": 1, "fea": 168.2, "fla": 161.5, "lea": 168.2, "lla": 161.5, "tei": "Bathonian", "tli": "Callovian", "siz": 1, "exs": 0, "phl": "Chordata", "cll": "Saurischia", "odl": "NO_ORDER_SPECIFIED", "fml": "Mamenchisauridae", "gnl": "Omeisaurus", "jev": "terrestrial", "jevb": "Sauropoda", "jmo": "actively mobile", "jmob": "Sauropoda", "jlh": "ground dwelling, gregarious", "jlhb": "Sauropoda", "jdt": "herbivore", "jdtb": "Sauropoda", "jre": "oviparous, dispersal=direct/internal,mobile", "jreb": "Sauropoda", "jon": "accretion,modification of parts", "jonb": "Sauropoda", "jco": "hydroxyapatite", "jsa": "compact or dense", "jth": "thick", "jtpb": "Sauropoda" } ] } }, "capture_urls": { "genus": "https://paleobiodb.org/data1.2/taxa/single.json?id=66512&show=full", "genus_opinions": "https://paleobiodb.org/data1.2/taxa/opinions.json?base_id=66512&op_type=all&show=ref,refattr", "original_species_name": "https://paleobiodb.org/data1.2/taxa/list.json?name=Zigongosaurus%20fuxiensis&show=full", "species_opinions": "https://paleobiodb.org/data1.2/taxa/opinions.json?base_id=56465&op_type=all&show=ref,refattr", "other_species": "https://paleobiodb.org/data1.2/taxa/list.json?name=Omeisaurus%20fuxiensis&show=full" } }, "specimen_resolution": { "verified_original_number": "02501 (Chongqing Museum; conventionallyCV02501 in2005)", "original_named_material": "Original article announces specimen02501 and describes cranial andpostcranial material across at leastfourindividuals. Detailed element-by-element type versusreferral inventory is not separately cataloged there.", "later_holotype_designation": "2005monograph Englishsynopsis callsCV02501 composite skeleton includingincomplete skull.", "not_supported": "CV00261 as Zigongosaurus holotype cannot be verified in original1976 or2005primarysource; conflicts with actual02501.", "omeisaurus_fuxiensis": "CV00267 differenttypebased on selectedbones fromsamequarry, including formerZigongosaurus paratype maxilla.", "latest_specimens": "2025comparativepaper citesZDM00251 andCQMNHCV025011; moderncatalog concordance toCV02501 unverified.", "objective_type_identity": "No primaryevidence found that Zigongosaurus andMamenchisaurus constructus/Omeisaurus junghsiensis share identicalnominaltype. Mamenchisaurus fuxiensis is a recombinationofHou1976species; genericcongenericity is historicallysubjective. O.fuxiensisDong1983 a separatenamedtype.", "mixed_material_implication": "Cannot treat everybonefromWujiaba or everyOmeisaurus occurrence asZigongosaurus. Compositeassociation/referral uncertainties undermine answerindependence withoutestablishing formalinvalidity." }, "usable_literature_facts": { "country": "China", "province": "Sichuan", "locality": "Wujiaba,Zigong", "geological_unit": "UpperShaximiao/Shangshaximiao (historicalboundary/ranknotations)", "broad_period": "Jurassic (age claim historically earlyLateJurassic; no exactgenusdate inferred)", "diet": "Herbivory strongly inferred fromsauropodspoonshapeddentition andbroadbiology; no directdietstudy discovered", "note": "These positivegeographyfacts can support conservativecompetitorretention alreadyimplemented. They do not independently settle answeridentity." }, "recommended_curator_note": "Zigongosaurus remains an accepted guess in our PBDB-based roster, but is held back as a hidden answer. Its original material combined several individuals, later studies split or reassigned some bones, and PBDB’s species record marks its type species as doubtful. Recent literature still uses Zigongosaurus separately, so we have not automatically merged it with Omeisaurus or Mamenchisaurus.", "release_condition": "A modern specimen-based revision or catalog-supported diagnosis/referral can establish a coherent independent answer; otherwise retainhiddenhold, with legalguess unchanged.", "unresolved_scientific_questions": [ "Which original CV02501 components belong together and whicharetype/referrals under contemporarycatalog?", "DoZDM00251/CQMNHCV025011 correspond preciselyto originaltype or othercompositemount?", "Whatcharacters securelydiagnoseZigongosaurus separatelyfromotherincludedmamenchisauridgenera?" ], "implementation_constraints": [ "No PBDB legalroster deletionbasedon a speciesrecordalone.", "No wholeOmeisaurus/Mamenchisaurus occurrence transfer.", "No claimthatonlytype-speciesdoubt makesgenuslegallyunavailable.", "No claimfullWang2019taxonomicpassage inspected.", "Preserve allcredible/qualifiedWujiabacompetitors." ], "implementation_summary": [ "Retain Zigongosaurus as a legal guess, because the accepted PBDB genus opinion classifies it in Mamenchisauridae.", "Hold it as a hidden answer, because specimen associations remain unsettled and PBDB marks its original type species, currently recombined as Mamenchisaurus fuxiensis, as a nomen dubium.", "Use verified original specimen number 02501, conventionally CV 02501 in the 2005 primary monograph. Do not repeat CV 00261 without new catalog evidence.", "Explain that Omeisaurus fuxiensis Dong et al. 1983 is a separately based nominal species, specimen CV 00267. Equal epithets and shared quarry are insufficient to equate types.", "Document that the 2025 Tongnanlong description still uses Zigongosaurus separately. This supports avoiding an imposed synonym, but does not by itself resolve composite material." ] }