Flagellopantopus

Flagellopantopus
Temporal range: Emsian
Diagrammatic Reconstruction of F. blocki
World map of the lower Devonian (400 mya), roughly the same age as the Hunsrück Slate
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Pycnogonida
Genus: Flagellopantopus
Poschmann & Dunlop, 2006
Species:
F. blocki
Binomial name
Flagellopantopus blocki
Poschmann & Dunlop, 2006

Flagellopantopus is an extinct genus of pycnogonid (sea spider) arthropod known from the lower Devonian aged Hunsrück Slate. A single species is currently known, Flagellopantopus blocki, which was described from the Emsian aged Kaub Formation in Germany.

F. blocki differs from other members of the Pycnogonida by possessing an extremely elongated telson, which was flagelliform in appearance. This animal was fairly large for a pycnogonid, with the whole body of the arthropod measuring around 26 mm (2.6 cm) long, while the telson itself was around 66 millimeters (6.6 cm) long. In its 2006 description, Poschmann and Dunlop placed Flagellopantopus into the order Pantopoda (which includes modern sea spiders). However, later publications have put doubt on this interpretation, and have suggested a new placement as a member of Pycnogonida incertae sedis. It is currently assumed to have lived a benthic lifestyle, as it lacks the flattened appendages and setae that pelagic species of pycnogonids typically have.

Discovery and naming

The holotype (and only known) specimen of this pycnogonid, NHMMZ PWL 2004/5024-LS, was first described by Poschmann in 2004 for Project Nahecaris,[a] but was considered a nomen nudum due to the lack of a diagnosis.[1] The specimen would later be given a proper diagnosis and description in 2006.[1] The holotype specimen originates from the Kaub Formation, which is dated to the Emsian stage of the lower Devonian, but the exact locality of origin is uncertain.[2] Poschmann and Dunlop (2006) state that the fossil was recovered from the Wingertshell Member, within the larger Obereschenbach quarry, near the municipality of Bundenbach.[1] However, the administration housing the fossil, the Naturhistorisches Museum Mainz, states that the specimen originates from the Eschenbach-Bocksberg quarry.[2]

NHMMZ PWL 2004/5024-LS imaged using both normal, and x-ray visualization

The arthropod's genus name, Flagellopantopus, is derived from the Latin word flagella, meaning "whip", which was named after the elongated telson possessed by the genus, and the pycnogonid order Pantopoda, which is derived from the Latin words pant and poda, meaning "all feet".[3][4][1] The specific name, blocki, is in honour of Helmut Block, who donated the holotype for public viewing and research.[1]

Ovigers of the holotype specimen under normal and x-ray visualization

Description

Flagellopantopus was relatively large compared to most other pycnogonids, with the main body (excluding telson) of the arthropod measuring around 26 mm (2.6 cm) long.[1] There are 5 dorsal tubercles located across the cephalon and trunk segments, with the first one represent ocular tubercle. By far the most distinguishing trait of this taxon was its extremely elongated telson (flagella), which measured around 66 millimeters (6.6 cm) long, nearly three times longer than the arthropods main body.[1] The telson was preceeded by a 4-segmented abdomen, which possess a pair of long projections at the second abdominal segment.[2]

Like most other pycnogonids, this genus possessed four pairs of walking legs that had at least a 90 mm (9 cm) arm-span.[5][1] Each leg possess an annulated coxa 1 and immobile junction between segment 4-5 similar to Palaeopantopus, while the distal regions (tibia and tarsal region) are not preserved. Coxa 1 of the first leg pair possess a long projection.[2]

All 3 pairs of cephalic appendages (chelifores, palps, ovigers) are evident, but most of the details are obscured by their poor preservation. Distal region of the oviger showing 6 segments (possibly patella, tibia, and 4 tarsal segments) and a terminal claw.[6][2]

The proboscis of this taxon is partially obscured, and how it connected to the rest of the cephalic region is uncertain.[2] The proboscis itself had a pyriform appearance and was roughly 6 mm (0.6 cm) long, and had a width of around 4 mm (0.4 cm) wide.[1]

Classification

Although they are often colloquially known as "sea spiders", pycnogonids are not closely related to them and other arachnids.[7] However, their placement as basal members of the Chelicerata subphylum means that they are more closely related to them then to other groups.[7] Flagellopantopus is confidently classified within the Pycnogonida, however its further placement is uncertain.[2] Both Poschmann (2004) and Poschmann and Dunlop (2006) placed this taxon as a relatively basal member of the Pantopoda order (which includes all crown-group sea spiders) on the basis of its long telson, which is lost in more derived taxa.[1] However, they classified this taxon as more derived than another contemporary pycnogonid, Palaeoisopus problematicus, due to Flagellopantopus possessing a less well developed abdomen, which is a derived trait in crown-group pycnogonids.[8][1] However, later studies, including Sabroux et al. (2024) have suggested that not only was Flagellopantopus not a member of Pantopoda, but the entire order did not exist during the Devonian.[2] They instead classified this taxon, and the other known Hunsrück pycnogonids into two different morphological groups separate from the Pantopoda.[2]

Paleoecology

The Hunsrück Slate is deposited within the regions of Hunsrück and Taunus within the country of Germany.[9] Although debates still stand about the exact depth of the ecosystem during the Devonian, most recent studies have suggested a maximum depth of around 100 meters (328.084 feet) deep, within the Epipelagic zone.[10] Due to the fact that Flagellopantopus possessed chelifores, it is likely that it was not restricted to feeding on sessile organisms, which is common in modern representatives.[10][2] It is also likely that it lived a fully benthic lifestyle, as it lacks the broad legs and long setae usually associated with swimming pycnogonids.[2] The telson of this taxon most likely would've acted as a sensory structure, as it was probably too stiff to help with locomotion in the water column.[2][1]

A plethora of other organisms are known to lived alongside Flagellopantopus, including other arthropods, echinoderms, placoderms, agnathans, and various other groups.[9] Some notable examples of contemporary genera include the peytoiid radiodont Schinderhannes bartelsi,[11] the marrellomorphid arthropods Mimetaster hexagonalis and Vachonisia rogeri,[12] as well as the various placoderms of the bizarre Pseudopetalichthyida order (which are only found at Hunsrück).[13] Also found in the area are various other pycnogonids, including Palaeopantopus maucheri,[14] Pentapantopus vogteli,[8] Palaeothea devonica,[14] and the aforementioned Palaeoisopus problematicus.[14] The level of pycnogonid genera found at the Hunsrück Slate makes it the most diverse assemblage of fossil pycnogonids yet discovered.[2]

Notes

  1. ^ Project Nahecaris, which was named after the phyllocarid crustacean Nahecaris, is an internationally funded program dedicated to studying the fauna and overall geologic significance of the Hunsrück Slate.

References

  1. ^ a b c d e f g h i j k l Poschmann, Markus; Dunlop, Jason A. (2006). "A new sea spider (Arthropoda: Pycnogonida) with a flagelliform telson from the Lower Devonian Hunsrück Slate, Germany". Palaeontology. 49 (5): 983–989. Bibcode:2006Palgy..49..983P. doi:10.1111/j.1475-4983.2006.00583.x.
  2. ^ a b c d e f g h i j k l m Sabroux, R.; Garwood, R. J.; Pisani, D.; Donoghue, P. C. J.; Edgecombe, G. D. (2024). "New insights into the Devonian sea spiders of the Hunsrück Slate (Arthropoda: Pycnogonida)". PeerJ. 12. e17766. doi:10.7717/peerj.17766. PMC 11485130. PMID 39421419.
  3. ^ "Pantopoda". Merriam-Webster.com Dictionary. Merriam-Webster.: "taxonomic synonym of Pycnogonida < Neo-Latin, from pant- + -poda"
  4. ^ "Definition of FLAGELLA". www.merriam-webster.com. Retrieved 2024-11-01.
  5. ^ Ruppert, Edward E. (1994). Invertebrate Zoology. Barnes, Robert D. (6th ed.). Fort Worth, TX: Saunders College Pub. ISBN 0-03-026668-8. OCLC 30544625.
  6. ^ Phylogenomic Resolution of Sea Spider Diversification through Integration of Multiple Data Classes
  7. ^ a b Dunlop, J. A.; Arango, C. P. (2005). "Pycnogonid affinities: A review". Journal of Zoological Systematics and Evolutionary Research. 43: 8–21. CiteSeerX 10.1.1.714.8297. doi:10.1111/j.1439-0469.2004.00284.x.
  8. ^ a b Kühl, Gabriele; Poschmann, Markus; Rust, Jes (May 2013). "A ten-legged sea spider (Arthropoda: Pycnogonida) from the Lower Devonian Hunsrück Slate (Germany)". Geological Magazine. 150 (3): 556–564. Bibcode:2013GeoM..150..556K. doi:10.1017/S0016756812001033. S2CID 129801458.
  9. ^ a b Wilkin, Jack T. R. (March 2023). "The Hunsrück Slate Konservat-Lagerstätte: The Hunsrück Slate Konservat-Lagerstätte". Geology Today. 39 (2): 72–76. doi:10.1111/gto.12426. ISSN 0266-6979.
  10. ^ a b Rust, Jes; Bergmann, Alexandra; Bartels, Christoph; Schoenemann, Brigitte; Sedlmeier, Stephanie; Kühl, Gabriele (2016). "The Hunsrück biota: A unique window into the ecology of Lower Devonian arthropods". Arthropod Structure & Development. 45 (2): 140–151. Bibcode:2016ArtSD..45..140R. doi:10.1016/j.asd.2016.01.004. ISSN 1873-5495. PMID 26826500.
  11. ^ Gabriele Kühl; Derek E. G. Briggs & Jes Rust (2009). "A great-appendage arthropod with a radial mouth from the Lower Devonian Hunsrück Slate, Germany". Science. 323 (5915): 771–773. Bibcode:2009Sci...323..771K. doi:10.1126/science.1166586. PMID 19197061. S2CID 47555807.
  12. ^ Stürmer, W; Bergström, J (1976). "The arthropods Mimetaster and Vachonisia from the Devonian Hunsrück Shale". Paläontologische Zeitschrift. 50 (1): 78–111. Bibcode:1976PalZ...50...78W. doi:10.1007/bf03001974.
  13. ^ Denison, Robert (1978). Placodermi. Handbook of Paleoichthyology. Vol. 2. Stuttgart New York: Gustav Fischer Verlag. pp. 22–23. ISBN 978-0-89574-027-4.
  14. ^ a b c Bergström, Jan; Stürmer, Wilhelm; Winter, Gerhard (1980-06-01). "Palaeoisopus, Palaeopantopus and Palaeothea, pycnogonid arthropods from the Lower Devonian Hunsrück Slate, West Germany". Paläontologische Zeitschrift. 54 (1–2): 7–54. Bibcode:1980PalZ...54....7B. doi:10.1007/BF02985882. S2CID 86746066.

Read other articles:

For other uses, see The Calm (disambiguation). 2005 EP by Insane Clown PosseThe CalmEP by Insane Clown PosseReleasedMay 17, 2005 (2005-05-17)StudioThe Lotus Pod (Detroit, MI)GenreHorrorcoreLength27:23LabelPsychopathic RecordsProducerInsane Clown PosseInsane Clown Posse chronology Dark Carnival Action Figures(2000) The Calm(2005) Eye of the Storm(2007) Professional ratingsReview scoresSourceRatingAllMusic[1] The Calm is the eleventh extended play by American hip ...

 

Kliper (Клипер, Inggris: Clipper) adalah pesawat ruang angkasa berawak dapat digunakan kembali sebagian diusulkan oleh RSC Energia. Karena kurangnya dana dari ESA dan RSA, proyek telah ditunda tanpa batas waktu pada 2006. Dirancang terutama untuk menggantikan pesawat ruang angkasa Soyuz, Kliper diusulkan dalam dua versi: sebagai desain body lift murni dan sebagai spaceplane dengan sayap kecil. Dalam kedua kasus, pesawat akan mampu meluncur ke atmosfer pada sudut yang menghasilkan jauh ...

 

Artikel ini perlu diwikifikasi agar memenuhi standar kualitas Wikipedia. Anda dapat memberikan bantuan berupa penambahan pranala dalam, atau dengan merapikan tata letak dari artikel ini. Untuk keterangan lebih lanjut, klik [tampil] di bagian kanan. Mengganti markah HTML dengan markah wiki bila dimungkinkan. Tambahkan pranala wiki. Bila dirasa perlu, buatlah pautan ke artikel wiki lainnya dengan cara menambahkan [[ dan ]] pada kata yang bersangkutan (lihat WP:LINK untuk keterangan lebih lanjut...

本條目存在以下問題,請協助改善本條目或在討論頁針對議題發表看法。 此條目需要补充更多来源。 (2018年3月17日)请协助補充多方面可靠来源以改善这篇条目,无法查证的内容可能會因為异议提出而被移除。致使用者:请搜索一下条目的标题(来源搜索:羅生門 (電影) — 网页、新闻、书籍、学术、图像),以检查网络上是否存在该主题的更多可靠来源(判定指引)。 �...

 

LuscianoKomuneComune di LuscianoLokasi Lusciano di Provinsi CasertaNegara ItaliaWilayah CampaniaProvinsiCaserta (CE)Luas[1] • Total4,56 km2 (1,76 sq mi)Ketinggian[2]68 m (223 ft)Populasi (2016)[3] • Total14.539 • Kepadatan3,200/km2 (8,300/sq mi)Zona waktuUTC+1 (CET) • Musim panas (DST)UTC+2 (CEST)Kode pos81030Kode area telepon081Situs webhttp://www.comunedilusciano.it Lusciano adala...

 

U.S. presidential election in Maryland Main article: 1984 United States presidential election 1984 United States presidential election in Maryland ← 1980 November 6, 1984 1988 →   Nominee Ronald Reagan Walter Mondale Party Republican Democratic Home state California Minnesota Running mate George H. W. Bush Geraldine Ferraro Electoral vote 10 0 Popular vote 879,918 787,935 Percentage 52.51% 47.02% County Results Reagan   50–60%  &...

Serge Lepeltier Serge Lepeltier en 2008. Fonctions Maire de Bourges 13 juin 2005 – 2 avril 2014(8 ans, 9 mois et 20 jours) Prédécesseur Roland Chamiot Successeur Pascal Blanc 23 juin 1995 – 31 mars 2004(8 ans, 9 mois et 8 jours) Prédécesseur Jean-Claude Sandrier Successeur Roland Chamiot Ministre de l'Écologie et du Développement durable 31 mars 2004 – 1er juin 2005(1 an, 2 mois et 1 jour) Président Jacques Chirac Gouvernement Jean-Pi...

 

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: The Best of Acoustic Jethro Tull – news · newspapers · books · scholar · JSTOR (June 2016) (Learn how and when to remove this template message) 2007 greatest hits album by Jethro TullThe Best Of AcousticGreatest hits album by Jethro TullReleasedJanuary...

 

Katedral Para Martir Janasuci Baru di Munchen Eparki Berlin dan Jerman adalah sebuah eparki (keuskupan) Gereja Ortodoks Rusia di Luar Rusia. Eparki tersebut meliputi wilayah Jerman, Austria dan Denmark dan telah berdiri sejak tahun 1924.[1] Ordinaris 1925–1938: Tikhon Ljaschtschenko 1938–1950: Serafim Lade 1950–1951: Benediktus Bobkowski 1951–1971: Aleksander Lowtschy 1971–1982: Filoteos Narko 1982–sekarang: Markus Arndt Referensi ^ https://web.archive.org/web/200104201629...

Populasi dunia dari 10.000 SM hingga 2000 M Argumen kiamat adalah argumen probabilistik yang diklaim bisa memprediksi jumlah manusia yang akan dilahirkan di masa depan dengan perkiraan jumlah total manusia yang lahir sejauh ini. Sederhananya, dikatakan bahwa seandainya semua manusia dilahirkan dalam urutan acak, kemungkinan ada satu manusia yang lahir kira-kira di tengah. Argumen ini pertama kali diusulkan secara eksplisit oleh astrofisikawan Brandon Carter pada tahun 1983,[1] sehingg...

 

Short story collection by Rudyard Kipling For the anthropological sense, see Just-so story. For the genre of which Kipling's stories purport to be examples, see Pourquoi story. Just So Stories First editionAuthorRudyard KiplingIllustratorRudyard KiplingCountryUnited KingdomLanguageEnglishGenreChildren's bookPublisherMacmillanPublication date1902 Just So Stories for Little Children is a 1902 collection of origin stories by the British author Rudyard Kipling. Considered a classic of children's ...

 

English lawyer and politician 1781–1851 The Right HonourableThe Earl of CottenhamPCLord Cottenham wearing ceremonial robes when presiding in the House of Lords as Lord Chancellor. Detail of a painting by Charles Robert Leslie.Lord High Chancellor of Great BritainIn office16 January 1836 – 30 August 1841MonarchsWilliam IV VictoriaPrime MinisterThe Viscount MelbournePreceded byIn CommissionSucceeded byThe Lord LyndhurstIn office6 July 1846 – 19 June 1850MonarchVictoriaPr...

Team sport Kin-BallThe black team is about to strike the ball.Highest governing bodyInternational Kin-Ball FederationFirst played1986; 38 years ago (1986) in QuébecCharacteristicsMixed-sexNo, separateTypeGym/court sportEquipment - Black, grey, or blue Kin-Ball – ball diameter: 1.2m (48 inches) – ball weighs 1 kg – court size is 20×20 meters (66×66 feet) (court lines are included in measurement) VenueGymnasium or courtPresenceCountry or regionWorldwideOlymp...

 

U.S. Senate election in Alabama 1978 United States Senate election in Alabama ← 1972 November 7, 1978 1984 →   Nominee Howell Heflin Jerome B. Couch Party Democratic Prohibition Popular vote 547,054 34,951 Percentage 93.99% 6.01% County resultsHeflin:      80–90%      >90% U.S. senator before election John Sparkman Democratic Elected U.S. Senator Howell Heflin Democratic Democratic primary first round resul...

 

أرجونا   المعارك حرب كوروكشترا  زوجات سوبادرا  [لغات أخرى]‏أولوبي  [لغات أخرى]‏دروباديتشيترانغدا  [لغات أخرى]‏  الأب إندرا[1]،  وباندو  [لغات أخرى]‏  الأم كونتي  [لغات أخرى]‏  ذرية أبيمانيو،  وبابروفاهانا  [لغا...

Національна суспільна телерадіокомпанія України Логотип Тип Акціонерне товариствоОрганізаційно-правова форма господарювання публічна компаніяГалузь медіаСпеціалізація виробництво і демонстрування теле-, радіоконтентуПопередник(и) Національна телекомпанія Україн...

 

Uang kertas 100 dolar Australia (Belakang) Uang kertas 100 dolar Australia (A$100) adalah nilai uang kertas yang pertama kali dikeluarkan oleh Reserve Bank of Australia pada tahun 1984 akibat inflasi. Uang kertas ini menampilkan potret di Dame Nellie Melba dan Sir John Monash. Referensi Ian W. Pitt, ed. (2000). Renniks Australian Coin and Banknote Values (edisi ke-19). Chippendale, N.S.W.: Renniks Publications. hlm. 171–172. ISBN 0-9585574-4-6.  lbsMata uang AustraliaTopik Re...

 

  لمعانٍ أخرى، طالع الديسة (توضيح). ' قرية الديسة  - قرية -  تقسيم إداري البلد  اليمن المحافظة محافظة حضرموت المديرية مديرية رخية العزلة عزلة رخية السكان التعداد السكاني 2004 السكان 2   • الذكور 1   • الإناث 1   • عدد الأسر 1   • عدد المساكن 7 معلومات أخر�...

Guy La Chambre Guy La Chambre, sous-secrétaire d'État à la Présidence du Conseil (1933). Fonctions Ministre chargé des Relations avec les États associés 2 septembre 1954 – 23 février 1955(5 mois et 21 jours) Président René Coty Président du Conseil Pierre Mendès France Gouvernement Gouvernement Mendès France Prédécesseur Edouard Frédéric-Dupont Successeur Henri Laforest Député français 5 juillet 1951 – 5 décembre 1958(7 ans et 5 mois) Élection 17...

 

Intrusive rocks with typical granitic composition Archean TTG rock outcrop in Kongling Complex, South China Craton. The white TTG rock body is intruded by dark mafic dikes, as well as light color felsic dikes. The mafic minerals in the TTG rock body, possibly biotite, were weathered, which introduced a brownish coating on the TTG rock surface. Tonalite–trondhjemite–granodiorite (TTG) rocks are intrusive rocks with typical granitic composition (quartz and feldspar) but containing only a sm...