Xujiachong Formation

Xujiachong Formation
Stratigraphic range: Pragian
TypeGeological formation
UnderliesChuandong Formation
OverliesGuijiatun Formation
Location
RegionYunnan
CountryChina

The Xujiachong Formation is an early Devonian formation from China. It preserves a wide range of plant and fish fossils, many being only known from this formation.

Paleobiota

Plants

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Plants
Genus Species Higher taxon Notes Images
Bracteophyton B. variatum Tracheophyta incertae sedis Resembles lycophytes somewhat, but likely not one itself.[1]
Drepanophycus D. qujingensis Drepanophycales Formerly placed within D. spinaeformis[2]
Guangnania G. cuneata Zosterophyllopsida Unclear whether it truly is a zosterophyll, somewhat similar to Yunia[3]
Hedeia H. sinica Progymnospermopsida Resembles both seed plants and trimerophytes[3]
Hsua H. robusta, H. deflexa[4] Rhyniophyta?[3]
Huia H. gracilis Zosterophyllales? More slender than the type species[5]
Zosterophyllum Z. yunnanicum, Z. australianum[6] Zosterophyllales Used to date the Xujiachong Formation[7]

Animals

Animals
Genus Species Higher taxon Notes Images
Eugaleaspis E. xujiachongensis[8] Galeaspida Formerly placed under “Galeaspis”, but this genus was preoccupied by the trilobite Galeaspis.
Gantarostrataspis G. gengi Galeaspida Mostly known from the Posongchong Formation[9]
Mizia M. longhuaensis, M. parvus Yunnanolepididae M. parvus formerly placed within Yunnanolepis[10]
Neopetalichthys[11] N. yenmenpaensis Petalichthyida Relatively basal member of the clade[12]
Pampetalichthys P. longhuaensis Petalichthyida Formerly classed as “Holopetalichthys”[13][14]
Pterogonaspis P. yuhaii Galeaspida Similar to Tridenaspis[15]
Qushiaspis Q. elaia Galeaspida Most basal member of Gantarostrataspididae.[16]
Sanqiaspis S. rostrata Galeaspida Another species known from Vietnam[17]
Sanchaspis S. magalarostrata Galeaspida Bears an unusual mushroom-shaped rostrum[18]
Szelepis S. yunnanensis Actinolepididae Redescribed in 2017[19]
Xichonolepis X. qujingensis[20] Sinolepidae (Antiarchi)
Youngolepis Y. praecursor Dipnoi Known from various other formations in early Devonian China[21]

References

  1. ^ Wang, De-Ming; Hao, Shou-Gang (2004). "Bracteophyton variatum gen. et sp. nov., an Early Devonian Plant from the Xujiachong Formation of Yunnan, China" (PDF). International Journal of Plant Sciences. 165 (2): 337–345. Bibcode:2004IJPlS.165..337W. doi:10.1086/381919. ISSN 1058-5893. JSTOR 10.1086/381919.
  2. ^ Cheng-Sen, Li; Edwards, D. (July 1995). "A re-investigation of Halle's Drepanophycus spinaeformis Göpp. from the Lower Devonian of Yunnan Province, southern China". Botanical Journal of the Linnean Society. 118 (3): 163–192. doi:10.1111/j.1095-8339.1995.tb00468.x.
  3. ^ a b c Hao, Shou gang; Xue, Jin zhuang (2013). The early Devonian Posongchong flora of Yunnan: a contribution to an understanding of the evolution and early diversification of vascular plants. Beijing: Science press. ISBN 978-7-03-036616-0.
  4. ^ Wang, De-Ming; Hao, Shou-Gang; Wang, Qi (July 2003). "Hsüa deflexa sp. nov. from the Xujiachong Formation (Lower Devonian) of eastern Yunnan, China". Botanical Journal of the Linnean Society. 142 (3): 255–271. doi:10.1046/j.1095-8339.2003.00187.x.
  5. ^ Wang, De-Ming; Hao, Shou-Gang (April 2001). "A new species of vascular plants from the Xujiachong Formation (Lower Devonian) of Yunnan Province, China". Review of Palaeobotany and Palynology. 114 (3–4): 157–174. Bibcode:2001RPaPa.114..157W. doi:10.1016/S0034-6667(01)00041-0. PMID 11389912.
  6. ^ Shou-Gang, Hao (June 1992). "Some observations on Zosterophyllum australianum Lang & Cookson from the Lower Devonian of Yunnan, China". Botanical Journal of the Linnean Society. 109 (2): 189–202. doi:10.1111/j.1095-8339.1992.tb00265.x.
  7. ^ Deming, Wang (August 2007). "Two Species of Zosterophyllum from South China and Dating of the Xujiachong Formation with a Biostratigraphic Method". Acta Geologica Sinica - English Edition. 81 (4): 525–538. Bibcode:2007AcGlS..81..525W. doi:10.1111/j.1755-6724.2007.tb00976.x.
  8. ^ Yuhai, Liu (October 1975). "川滇早泥盆世的无颌类". Vertebrata PalAsiatica (in Mandarin). 13 (4): 202–216.{{cite journal}}: CS1 maint: unrecognized language (link)
  9. ^ Min, Zhu; Wang, Junqing; Fan, Junhang (1994). "Early Devonian fishes from Guijiatun and Xujiachong Formations of Qujing, Yunnan, and Related Biostratigraphic Problems". Vertebrata PalAsiatica. 32 (1): 1–11.
  10. ^ Min, Zhu. (1996). "The Phylogeny of Antiarcha (Placodermi, Pisces), with the Description of Early Devonian Antiarchs from Qujing, Yunnan, China" (PDF). Bulletin du Muséum National d'Histoire Naturelle. 18: 233–347. Archived from the original (PDF) on 2012-06-23. Retrieved 2013-12-29.
  11. ^ Yuhai, Liu (1973). "川滇泥盆纪的多鳃鱼和大瓣鱼化石" (PDF). Journal of Vertebrate Paleontology (in Mandarin). 11 (2): 132–143.{{cite journal}}: CS1 maint: unrecognized language (link)
  12. ^ Zhu, Min & Wang, Junqing (October 1996). "A NEW MACROPETALICHTHYID FROM CHINA, WITH SPECIAL REFERENCE TO THE ZOOGEOGRAPHY OF THE MACROPETALICHTHYIDAE (PLACODERMI)" (PDF). Vertebrata PalAsiatica. 34 (4): 253–268.
  13. ^ Zhu, Min (2000). "Catalogue of Devonian vertebrates in China, with notes on bio-events". Courier-Forschungsinstitut Senckenberg. 2000: 373–390.
  14. ^ Zhu, Min (July 1996). "A new Macropetalichthyid from China, with special reference to the historical zoogeography of the Macropetalichthyidae (Placodermi)". Vertebrata PalAsiatica. 34 (4): 253–268.
  15. ^ Zhu, Min (1992). "Two new Eugaleaspids, with a Discussion on Eugaleaspid Phylogeny". Vertebrata PalAsiatica. 30 (3): 169–184.
  16. ^ Jiang, Wenyu; Zhu, Min; Shi, Xiaodong; Li, Qiang; Gai, Zhikun (2 December 2021). "Qushiaspis , a new genus of gantarostrataspid fish (galeaspida, stem-gnathostomata) from the Lower Devonian of Yunnan, China". Historical Biology. 33 (12): 3714–3722. Bibcode:2021HBio...33.3714J. doi:10.1080/08912963.2021.1888086.
  17. ^ Gai, Zhi-Kun; Jiang, Wen-Yu; Zhao, Wen-Jin; Li, Qiang; Shi, Xiao-Dong; Zhu, Min (March 2022). "Redescription of the Sanqiaspidae (Galeaspida) from the Lower Devonian of South China and its biostratigraphic significance". Palaeobiodiversity and Palaeoenvironments. 102 (1): 173–191. Bibcode:2022PdPe..102..173G. doi:10.1007/s12549-021-00486-Z.
  18. ^ Jiang, Pan; Shitao, Wang (April 1981). "New Discoveries of Polybranchiaspids from Yunnan Province" (PDF). Vertebrata PalAsiatica. 19 (2).
  19. ^ Dupret, Vincent; Zhu, Min; Wang, Jun-Qing (4 March 2017). "Redescription of Szelepis Liu, 1981 (Placodermi, Arthrodira), from the Lower Devonian of China". Journal of Vertebrate Paleontology. 37 (2): e1312422. Bibcode:2017JVPal..37E2422D. doi:10.1080/02724634.2017.1312422.
  20. ^ Ritchie, A.; Shitao, W.; Young, Gavin C.; Guorui, Z. (5 December 1992). "The Sinolepidae, a family of antiarchs (placoderm fishes) from the Devonian of South China and eastern Australia". Records of the Australian Museum. 44 (3): 319–370. doi:10.3853/j.0067-1975.44.1992.38.
  21. ^ Mee-Mann, Chang; Xiaobo, Yu (January 1981). "A New Crossopterygian, Youngolepis praecursor gen et. sp nov., from Lower Devonian of E. Yunnan, China". Scientia Sinica. 24 (1): 89–97.


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