Geologic formation in Lebanon
The Sannine Formation , also called the Sannine Limestone , is a Cretaceous  geologic formation  in Lebanon . It is a Konservat-Lagerstätte  that contains a high diversity of well-preserved fish, reptiles, and invertebrates from the Tethys Ocean  within its three main localities: Haqel  (alternatively Hakel or Haqil), Hjoula  (alternatively Hadjoula, Hajoula, or Hgula), and Nammoura  (alternatively Namoura).[ 1] 
It is one of three major Cretaceous lagerstätte in Lebanon, alongside the older (Barremian -aged) Lebanese amber  and the younger (Santonian -aged) Sahel Aalma  site. The Sannine Formation localities, combined with Sahel Alma, are together referred to as the "Fish Beds" of Lebanon.[ 1] 
It is primarily Cenomanian  in age, with Haqel and Hjoula being late Cenomanian, while the slightly older Nammoura site is middle Cenomanian.[ 1] [ 2] [ 3] 
The Cretaceous formations of Lebanon laterally vary from east to west; the western lowland "coastal" sequence (containing Sahel Aalma) is over 2000 metres thick and primarily consists of deep water limestone and chalk, while the eastern "mountain" sequence (containing the Sannine Formation) is 500–700 metres thick and consists of shallow water limestone.[ 4] continental shelf  environment with significant terrestrial input, while Haqel & Hjoula preserve an outer continental shelf environment. The neritic nature of these habitats contrasts with the other major marine lagerstätte of the region, Sahel Aalma, which is thought to have been deposited in a deepwater continental slope  environment.[ 1] 
Modern position of the Hjoula locality compared to its Cretaceous location. Pterosaur  fossils have been recovered from the formation, including those of Mimodactylus [ 3] Microtuban [ 5] pythonomorphs  Pontosaurus , Eupodophis Aphanizocnemus [ 6] dragonfly ,[ 7] Chresmoda .[ 8] mesoblattinid  cockroach.[ 9] Sapindopsis . [ 10] [ 11] ionoscopid  Spathiurus dorsalis [ 12] pycnodontid  Flagellipinna rhomboides .[ 13] acanthomorphs , African butterflyfish  and eels .[ 1] 
The Sannine Formation and its fossil fishes have been known of since Roman Phoenicia . The earliest mention of them is in the Chronicon Eusebius  around 314 CE (references to earlier mentions by Herodotus  are thought to be apocryphal), who mentions fossil fishes commonly being found during quarrying operations in the mountains, and cites them as evidence  of the Biblical Flood . The site that these fish were recovered from is thought to correspond to the modern Haqel site. Around 1250, fossil fishes were presented to Louis IX  during the Seventh Crusade  and documented by Jean de Joinville , although it remains uncertain whether these originated from Haqel or the younger Sahel Alma site.[ 1] [ 14] 
The first European to visit a Lebanese fossil fish locality in person was Cornelis de Bruijn  in 1698, who illustrated a fossil fish that corresponds with the species Prionolepis cataphractus French Academy of Sciences , and the first scientific studies were conducted by Henri Marie Ducrotay de Blainville  in 1818. Lady Hester Stanhope  collected and circulated fossil fishes from Haqel and Sahel Alma during the early 19th century, contributing to the study of these specimens by scientists such as Louis Agassiz . The Hadjoula site was only discovered in the late 19th century, and the Nammoura site in the early 20th century.[ 1] [ 14] 
Agnathans  reported from the Sannine Formation 
Genus
 
Species
 
Presence
 
Notes
 
Images
  
Tethymyxine T. tapirostrum 
Hjoula
 
One of the earliest known definitive fossil hagfish .[ 15]  
 
^ a b c d e f g h   George, Hady; Bazzi, Mohamad; Hossny, Tamara El; Ashraf, Nida; Saad, Pierre Abi; Clements, Thomas (2024-04-29). "The famous fish beds of Lebanon: the Upper Cretaceous Lagerstätten of Haqel, Hjoula, Nammoura, and Sahel Aalma" . Journal of the Geological Society . 181  (5). doi :10.1144/jgs2023-210 ISSN  0016-7649 . ^ López-Arbarello, Adriana. "The record of Mesozoic fishes from Gondwana (excluding India and Madagascar)" . Mesozoic Fishes 3 – Systematics, Paleoenvironments and Biodiversity . ^ a b c   Kellner, Alexander W. A.; Caldwell, Michael W.; Holgado, Borja; Vecchia, Fabio M. Dalla; Nohra, Roy; Sayão, Juliana M.; Currie, Philip J. (2019-11-29). "First complete pterosaur from the Afro-Arabian continent: insight into pterodactyloid diversity" . Scientific Reports . 9  (1): 17875. Bibcode :2019NatSR...917875K . doi :10.1038/s41598-019-54042-z . ISSN  2045-2322 . PMC  6884559 PMID  31784545 . ^ Walley, Christopher D. (1997). The Lithostratigraphy of Lebanon: A Review (PDF) . pp. 1– 20. Archived from the original  (PDF)  on 2019-07-13. Retrieved 2023-10-06  . ^ a b   Elgin, Ross A.; Frey, Eberhard (December 2011). "A new azhdarchoid pterosaur from the Cenomanian (Late Cretaceous) of Lebanon" . Swiss Journal of Geosciences 104  (S1): 21– 33. doi :10.1007/s00015-011-0081-1 ISSN  1661-8726 . S2CID  128405107 . ^ a b c d   Campbell Mekarski, Michelle; Pierce, Stephanie E.; Caldwell, Michael W. (2019-09-24). "Spatiotemporal Distributions of Non-ophidian Ophidiomorphs, With Implications for Their Origin, Radiation, and Extinction" . Frontiers in Earth Science . 7 : 245. Bibcode :2019FrEaS...7..245M . doi :10.3389/feart.2019.00245 ISSN  2296-6463 . ^ a b c   Azar, Dany; Maksoud, Sibelle; Huang, Diying; Nel, André (January 2019). "First Lebanese dragonflies (Insecta: Odonata, Aeshnoptera, Cavilabiata) from the Arabo-African mid-Cretaceous paleocontinent"  (PDF) . Cretaceous Research . 93 : 78– 89. Bibcode :2019CrRes..93...78A . doi :10.1016/j.cretres.2018.08.025 . S2CID  134308438 . ^ a b   Nel, Andre; Azar, Dany; Martinez-Delclos, Xavier; Makhoul, Edouard (2004-03-25). "A new Upper Cretaceous species of Chresmoda from Lebanon - a latest representative of Chresmodidae (Insecta: Polyneoptera inc. sed.): first record of homeotic mutations in the fossil record of insects" . European Journal of Entomology . 101  (1): 145– 151. doi :10.14411/eje.2004.019  ^ a b   P. Vršanský and E. Makhoul. 2013. Mieroblattina pacis gen. et sp. n. - Upper Cretaceous cockroach (Blattida: Mesoblattinidae) from Nammoura limestone of Lebanon . Insect Evolution in an Ambiferous and Stone Alphabet  167-172 
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^ Jattiot, Romain; Brayard, Arnaud; Fara, Emmanuel; Charbonnier, Sylvain (2015). "Gladius-bearing coleoids from the Upper Cretaceous Lebanese Lagerstätten: diversity, morphology, and phylogenetic implications" . Journal of Paleontology . 89  (1): 148– 167. Bibcode :2015JPal...89..148J . doi :10.1017/jpa.2014.13 . ISSN  0022-3360 . ^ a b   Fuchs, Dirk; Larson, Neal (2011). "Diversity, Morphology, and Phylogeny of Coleoid Cephalopods from the Upper Cretaceous Plattenkalks of Lebanon–Part II: Teudopseina" Journal of Paleontology . 85  (5): 815– 834. Bibcode :2011JPal...85..815F . doi :10.1666/10-159.1 . ISSN  0022-3360 . ^ Whalen, Christopher D.; Landman, Neil H. (2022-03-08). "Fossil coleoid cephalopod from the Mississippian Bear Gulch Lagerstätte sheds light on early vampyropod evolution" . Nature Communications . 13  (1): 1107. Bibcode :2022NatCo..13.1107W . doi :10.1038/s41467-022-28333-5 . ISSN  2041-1723 . PMC  8904582 PMID  35260548 . ^ Fuchs, D.; Weis, R. (2009-08-01). "A new Cenomanian (Late Cretaceous) coleoid (Cephalopoda) from Hâdjoula, Lebanon" . Fossil Record . 12  (2): 175– 181. Bibcode :2009FossR..12..175F . doi :10.1002/mmng.200900005 ISSN  2193-0066 . ^ a b   Fuchs; Bracchi; Weis, Dirk; Giacomo; Robert (31 December 2008). "NEW OCTOPODS (CEPHALOPODA: COLEOIDEA) FROM THE LATE CRETACEOUS (UPPER CENOMANIAN) OF HÂKEL AND HÂDJOULA, LEBANON" . Palaeontology . 52  (1): 65– 81. doi :10.1111/j.1475-4983.2008.00828.x S2CID  129082916 . {{cite journal }}:  CS1 maint: multiple names: authors list (link )^ Jattiot, Romain; Brayard, Arnaud; Fara, Emmanuel; Charbonnier, Sylvain (January 2015). "Gladius-bearing coleoids from the Upper Cretaceous Lebanese Lagerstätten: diversity, morphology, and phylogenetic implications" . Journal of Paleontology . 89  (1): 148– 167. Bibcode :2015JPal...89..148J . doi :10.1017/jpa.2014.13 . ISSN  0022-3360 . ^ Klug, Christian; Pohle, Alexander; Roth, Rosemarie; Hoffmann, René; Wani, Ryoji; Tajika, Amane (2021-07-23). "Preservation of nautilid soft parts inside and outside the conch interpreted as central nervous system, eyes, and renal concrements from the Lebanese Cenomanian" . Swiss Journal of Palaeontology 140  (1): 15. Bibcode :2021SwJP..140...15K . doi :10.1186/s13358-021-00229-9 ISSN  1664-2384 . PMC  8549922 PMID  34721283 . ^ "Lebanese Fossils" . www.fossilmuseum.net . Retrieved 2024-07-10  .^ Reich, M. (2004-12-15). Nebelsick, J; Heinzeller, T (eds.). "Echinoderms: Munchen: Proceedings of the 11th International Echinoderm Conference, 6-10 October 2003, Munich, Germany" Echinoderms: Milnchen - Heinzeller & Nebelsick (Eds) . Taylor & Francis. doi :10.1201/9780203970881 . ISBN  978-0-415-36481-2  ^ "WoRMS - World Register of Marine Species" . www.marinespecies.org . Retrieved 2024-07-10  .^ Parry, Luke A.; Wilson, Paul; Sykes, Dan; Edgecombe, Gregory D.; Vinther, Jakob (2015-11-17). "A new fireworm (Amphinomidae) from the Cretaceous of Lebanon identified from three-dimensionally preserved myoanatomy" . BMC Evolutionary Biology . 15  (1): 256. Bibcode :2015BMCEE..15..256P . doi :10.1186/s12862-015-0541-8 ISSN  1471-2148 . PMC  4650273 PMID  26577802 . ^ a b c d e f g h i j k   Krassilov, Valentin; Bacchia, Flavio (2000-12). "Cenomanian florule of Nammoura, Lebanon ". Cretaceous Research. 21 (6): 785–799. doi:10.1006/cres.2000.0229. ISSN 0195-6671.