<documentid="511BF21B46D16CFED57DCB21DE397BC3"ID-CLB-Dataset="22081"ID-DOI="10.5852/ejt.2018.490"ID-GBIF-Dataset="52356089-4633-4477-99c9-45f18606f5b9"ID-Zenodo-Dep="3830845"ID-ZooBank="BE023137-CC5E-4DC5-94F6-B549BB140361"IM.bibliography_approvedBy="carolina"IM.illustrations_approvedBy="carolina"IM.materialsCitations_approvedBy="carolina"IM.metadata_approvedBy="felipe"IM.tables_requiresApprovalFor="existingObjects,plazi"IM.taxonomicNames_approvedBy="felipe"IM.treatmentCitations_approvedBy="felipe"IM.treatments_approvedBy="carolina"checkinTime="1589637568005"checkinUser="valdenar"docAuthor="Koromyslova, Anna V., Taylor, Paul D., Martha, Silviu O. & Riley, Matthew"docDate="2018"docId="03D587D79647FF99F302FA01FE02FDC8"docLanguage="en"docName="ejt-490_koromyslova_taylor_martha_riley.pdf.imf"docOrigin="European Journal of Taxonomy 490"docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.14:EJT.2018-.journal_article.type1"docStyleId="EF2B578F1D15862ADE45B0C07C620911"docStyleName="EJT.2018-.journal_article.type1"docStyleVersion="14"docTitle="Rhagasostoma mimosa"docType="treatment"docVersion="12"lastPageNumber="56"masterDocId="FFECFFAF9676FFAEF12BFFD3FFE7FF87"masterDocTitle="Rhagasostoma (Bryozoa) from the Late Cretaceous of Eurasia: taxonomic revision, stratigraphy and palaeobiogeography"masterLastPageNumber="66"masterPageNumber="1"pageNumber="50"updateTime="1737731558912"updateUser="ExternalLinkService"zenodo-license-document="CC-BY-4.0"zenodo-license-figures="CC-BY-4.0"zenodo-license-treatments="UNSPECIFIED">
<mods:titleid="12FFA204E46039EF18847F0D5B5B2E50">Rhagasostoma (Bryozoa) from the Late Cretaceous of Eurasia: taxonomic revision, stratigraphy and palaeobiogeography</mods:title>
<mods:affiliationid="601D67373539D1AA1C6A35AC4666D3A7">Borissiak Paleontological Institute of the Russian Academy of Science, Profsoyuznaya st. 123, Moscow, 117997, Russian Federation. Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW 7 5 BD, UK. Senckenberg Forschungsinstitute und Naturmuseun, Sektion Marine Evertebraten III (Bryozoologie), Senckenberganlage 25, 60325 Frankfurt am Main, Germany. The Sedgwick Museum of Earth Sciences, Department of Earth Sciences, University of Cambridge, UK.</mods:affiliation>
<bibRefCitationid="EFED4B309647FF9FF27BFA00FBE5FA6A"author="Brydone R. M."box="[848,1026,1491,1517]"pageId="49"pageNumber="50"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone, 1930</bibRefCitation>
<figureCitationid="13472A449647FF9FF39CFA25FCEBF997"box="[695,780,1526,1552]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="49"pageNumber="50">Fig. 19</figureCitation>
,
<tableCitationid="C6FE037A9647FF9FF233FA25FC9BF997"box="[792,892,1526,1552]"captionStart="Table 11"captionStartId="51.[188,257,580,608]"captionTargetPageId="51"captionText="Table 11 (continued on next page). Summary of measurements of Rhagasostoma mimosa (Brydone, 1930). For each parameter the range is given with the number of measurements in brackets. The arithmetic mean is given ± standard deviation. All measurements in µm."httpUri="http://table.plazi.org/id/DF0366499645FF9DF197FD97F9CFFD04"pageId="49"pageNumber="50"tableUuid="DF0366499645FF9DF197FD97F9CFFD04">Table 11</tableCitation>
<bibRefCitationid="EFED4B309647FF9FF090F9E4FD7EF9D5"author="Brydone R. M."box="[443,665,1591,1618]"pageId="49"pageNumber="50"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone, 1930: 49</bibRefCitation>
<bibRefCitationid="EFED4B309647FF9FF095F9AAFD89F913"author="Voigt E."box="[446,622,1657,1684]"pageId="49"pageNumber="50"pagination="5 - 95"refId="ref32804"refString="Voigt E. 1967. Oberkreide-Bryozoen aus den asiatischen Gebieten der UdSSR. Mitteilungen aus dem Geologischen Staatsinstitut in Hamburg 36: 5 - 95."type="journal article"year="1967">Voigt 1967: 50</bibRefCitation>
<bibRefCitationid="EFED4B309647FF9FF210F9AAFBF1F914"author="Schubert T."box="[827,1046,1657,1683]"pageId="49"pageNumber="50"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986: 40</bibRefCitation>
<bibRefCitationid="EFED4B309647FF9FF0BCF94FFDAFF930"author="Brydone R. M."box="[407,584,1692,1719]"pageId="49"pageNumber="50"pagination="289 - 300"refId="ref29857"refString="Brydone R. M. 1906. Further notes on the stratigraphy and fauna of the Trimingham Chalk. Geological Magazine, New Series (Decade V) 3 (7): 289 - 300. https: // doi. org / 10.1017 / S 0016756800118321"type="journal article"year="1906">Brydone, 1906</bibRefCitation>
)
</taxonomicName>
–
<bibRefCitationid="EFED4B309647FF9FF345F94FFCFEF931"author="Schubert T."box="[622,793,1692,1718]"pageId="49"pageNumber="50"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
pars: 39, pl. 3, fig. 7, pl. 5, figs 4–5, pl. 8, figs 2–3.
<bibRefCitationid="EFED4B309647FF9FF0FAF96CFD31F95E"author="Favorskaya T. A."box="[465,726,1727,1753]"pageId="49"pageNumber="50"pagination="115 - 136"refId="ref30441"refString="Favorskaya T. A. 1992. Мsaнki kaмpaнa i мaaсtрikta Юga СССР [Campanian and Maastrichtian bryozoans of the southern USSR]. In: Okuneva T. M., Titova M. V., Favorskaya T. A., Zonova T. D. & Rostovtsev K. O. (eds) Atlas rukovodyashchikh grupp fauny mesozoya Yuga i Vostoka SSSR. Trudy Vserossiyskogo Nauchno-issledovatelskogo Geologicheskogo Instituta, new series 350: 115 - 136. Nedra, St Petersburg."type="book chapter"year="1992">Favorskaya 1992: 120</bibRefCitation>
(mention). —
<bibRefCitationid="EFED4B309647FF9FF2AFF96CFB90F95E"author="Koromyslova A. V."box="[900,1143,1727,1753]"pageId="49"pageNumber="50"pagination="275 - 286"refId="ref30825"refString="Koromyslova A. V. 2014 a. Morphological features and systematic position of the bryozoans Onychocella rowei and O. mimosa (Cheilostomata) from a Campanian erratic block (Belarus). Paleontological Journal 48 (3): 275 - 286. https: // doi. org / 10.1134 / S 0031030114030137"type="journal article"year="2014">Koromyslova 2014a</bibRefCitation>
<bibRefCitationid="EFED4B309647FF9FF0F3F8D2FD64F89C"author="Schubert T."box="[472,643,1793,1819]"pageId="49"pageNumber="50"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
pars: 39, non pl. 3, figs 5–6, 8, pl. 5, figs 1–3, 6–8, pl. 8, fig. 1.
<figureCitationid="13472A449647FF9FF348F864FD50F856"box="[611,695,1975,2001]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="49"pageNumber="50">Fig. 19</figureCitation>
AB; figured by
<bibRefCitationid="EFED4B309647FF9FF244F864FBFDF856"author="Brydone R. M."box="[879,1050,1975,2001]"pageId="49"pageNumber="50"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone 1930</bibRefCitation>
<bibRefCitationid="EFED4B309644FF9CF367F95DFCE3F92F"author="Brydone R. M."box="[588,772,1678,1704]"pageId="50"pageNumber="51"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone, 1930</bibRefCitation>
<bibRefCitationid="EFED4B309645FF9DF5F5FD97FA75FDE7"author="Brydone R. M."box="[1246,1426,580,608]"pageId="51"pageNumber="52"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone, 1930</bibRefCitation>
)
</taxonomicName>
. For each parameter the range is given with the number of measurements in brackets. The arithmetic mean is given ± standard deviation. All measurements in µm.
<materialsCitationid="3B143C9C9643FF9BF196FEFDFBC4FECF"ID-GBIF-Occurrence="2620322325"box="[189,1059,302,329]"collectionCode="SMF, C"country="Denmark"location="Island of Mon"municipality="Maastrichtian"pageId="53"pageNumber="54"specimenCount="1">
<locationid="8EA3601A9643FF9BF041FEFDFDF3FECE"LSID="urn:lsid:plazi:treatment:03D587D79647FF99F302FA01FE02FDC8:8EA3601A9643FF9BF041FEFDFDF3FECE"box="[362,532,302,329]"country="Denmark"municipality="Maastrichtian"name="Island of Mon"pageId="53"pageNumber="54">Island of Møn</location>
<collectionCodeid="ED6DAE049643FF9BF238FEFDFCA9FECF"box="[787,846,302,328]"collectionName="Germany, Frankfurt-am-Main, Forschungsinstitut und Naturmuseum Senckenberg"country="Germany"httpUri="http://biocol.org/urn:lsid:biocol.org:col:34838"lsid="urn:lsid:biocol.org:col:34838"name="Forschungsinstitut und Natur-Museum Senckenberg"pageId="53"pageNumber="54">SMF</collectionCode>
<figureCitationid="13472A449643FF9BF285FEFDFBFDFECF"box="[942,1050,302,328]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="53"pageNumber="54">
• 2 specs; Mangystau Region;?early Maastrichtian of Hanga-Baba (урочиЩе Хангабаба) on the Mangyshlak Peninsula;
<collectionCodeid="ED6DAE049643FF9BF35BFE40FD78FE2A"box="[624,671,403,429]"country="Russia"httpUri="http://grbio.org/cool/kjjc-ziy5"name="Paleontological Institute, Russian Academy of Sciences"pageId="53"pageNumber="54">PIN</collectionCode>
5502/3056 (
<figureCitationid="13472A449643FF9BF21FFE40FC7BFE2A"box="[820,924,403,429]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="53"pageNumber="54">Fig. 19F</figureCitation>
), 5502/3057 (
<figureCitationid="13472A449643FF9BF515FE40FB76FE2A"box="[1086,1169,403,429]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="53"pageNumber="54">Fig. 19</figureCitation>
<specimenCodeid="DBDA9EBA9643FF9BF0D2FDC8FD8AFDB2"box="[505,621,539,565]"collectionCode="PIN"country="Russia"httpUri="http://grbio.org/cool/kjjc-ziy5"name="Paleontological Institute, Russian Academy of Sciences"pageId="53"pageNumber="54">PIN 2922</specimenCode>
/203, 2922/207 (imaged in
<bibRefCitationid="EFED4B309643FF9BF282FDC9FB7BFDB2"author="Koromyslova A. V."box="[937,1180,538,565]"pageId="53"pageNumber="54"pagination="275 - 286"refId="ref30825"refString="Koromyslova A. V. 2014 a. Morphological features and systematic position of the bryozoans Onychocella rowei and O. mimosa (Cheilostomata) from a Campanian erratic block (Belarus). Paleontological Journal 48 (3): 275 - 286. https: // doi. org / 10.1134 / S 0031030114030137"type="journal article"year="2014">Koromyslova 2014a</bibRefCitation>
Colony rigidly erect, bifoliate, multiserial, branches 2.0–10.0 mm wide. Ancestrula and early astogeny not observed. Colony formed by pyriform and ovate autozooids and vicarious avicularia. Autozooids subrectangular with rounded distal ends; zooidal boundaries raised. Pyriform autozooids with a narrow proximal end but widening distally, the widening usually starting from the proximal margin of the opesia. In ovate autozooids, the proximal end is partly overlapped by the avicularian rostra and the autozooid begins to widen considerably below the proximal margin of the opesia, usually at the boundary with an avicularium. Gymnocyst lacking. Cryptocyst slightly granulated, slightly depressed centrally and occupying half or more of the autozooidal frontal surface, peripheral caverns lacking. Opesia terminal or subterminal. Opesial rim elevated, formed by a projecting, thickened cryptocyst, subcircular, a pair of opesiules located
proximallateral of opesia and divided from the latter by a cryptocystal tongue. Fusion of cryptocyst distal of opesiules and tongue of cryptocyst incomplete. Septula in walls not observed. Ovicells immersed, ooecium is formed by the distal zooid, triangular, vestigial, with slightly granulated surface, not protruding above the colony surface (
<figureCitationid="13472A449643FF9BF0D4FB87FDB2FBE9"box="[511,597,1108,1134]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="53"pageNumber="54">Fig. 19</figureCitation>
A–B, D–F). Avicularia vicarious, rhomboidal. Rostrum conical in outline and symmetrical, usually with straight lateral walls; indentations or projections present at base of rostrum. Usually two
of avicularia differing mainly in the length of the rostrum and rostral apex, which partly overlaps the proximal end of the distal autozooids: avicularia with short rostra and short, trough-like apices (
), and avicularia with long rostra without projecting apices. Proximal part short, narrowing downwards, with convex lateral sides. Entire frontal surface of avicularium occupied by a fragile, slightly granulated cryptocyst containing five openings: two small, subcircular openings, distally and proximally, in between three slit-like, parallel openings. Cryptocyst between openings frequently destroyed causing them to coalesce into a single opening of variable outline. Closure plates, kenozooids and intramural reparative budding in autozooids and avicularia not observed.
<bibRefCitationid="EFED4B309643FF9BF396F9F7FC9EF9B9"author="Brydone R. M."box="[701,889,1572,1598]"pageId="53"pageNumber="54"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone (1930)</bibRefCitation>
<bibRefCitationid="EFED4B309643FF9BF3CCF994FC7CF9E5"author="Brydone R. M."box="[743,923,1607,1634]"pageId="53"pageNumber="54"pagination="289 - 300"refId="ref29857"refString="Brydone R. M. 1906. Further notes on the stratigraphy and fauna of the Trimingham Chalk. Geological Magazine, New Series (Decade V) 3 (7): 289 - 300. https: // doi. org / 10.1017 / S 0016756800118321"type="journal article"year="1906">Brydone, 1906</bibRefCitation>
)
</taxonomicName>
but differing from the latter in having two opesiules. He considered the possibility that colonies of
<bibRefCitationid="EFED4B309643FF9BF196F8C6FEB3F8B7"author="Voigt E."box="[189,340,1813,1840]"pageId="53"pageNumber="54"pagination="5 - 95"refId="ref32804"refString="Voigt E. 1967. Oberkreide-Bryozoen aus den asiatischen Gebieten der UdSSR. Mitteilungen aus dem Geologischen Staatsinstitut in Hamburg 36: 5 - 95."type="journal article"year="1967">Voigt (1967)</bibRefCitation>
from Central Asia and rejected the morphological arguments used by
<bibRefCitationid="EFED4B309643FF9BF0B5F8EAFDBFF8D4"author="Brydone R. M."box="[414,600,1849,1875]"pageId="53"pageNumber="54"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone (1930)</bibRefCitation>
to separate the two species. He concluded that except for
during the Late Cretaceous resulted over time in the formation of two opesiules completely separated from the opesia as passages for the bundles of parietal muscles. A similar development has also been observed in
<bibRefCitationid="EFED4B309640FF98F196FEFCFE8CFECE"author="Marsson T."box="[189,363,303,329]"pageId="54"pageNumber="55"pagination="1 - 112"refId="ref31259"refString="Marsson T. 1887. Die Bryozoen der weissen Schreibkreide der Insel Rugen. Palaeontologische Abhandlungen 4: 1 - 112."type="journal article"year="1887">Marsson, 1887</bibRefCitation>
</taxonomicName>
(cf.
<bibRefCitationid="EFED4B309640FF98F08AFEFDFDA8FECF"author="Schubert T."box="[417,591,302,328]"pageId="54"pageNumber="55"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
<bibRefCitationid="EFED4B309640FF98F048FE81FE19FEEA"author="Voigt E."box="[355,510,338,365]"pageId="54"pageNumber="55"pagination="5 - 95"refId="ref32804"refString="Voigt E. 1967. Oberkreide-Bryozoen aus den asiatischen Gebieten der UdSSR. Mitteilungen aus dem Geologischen Staatsinstitut in Hamburg 36: 5 - 95."type="journal article"year="1967">Voigt (1967)</bibRefCitation>
<bibRefCitationid="EFED4B309640FF98F309FE65FD04FE56"author="Schubert T."box="[546,739,438,465]"pageId="54"pageNumber="55"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert (1986)</bibRefCitation>
stage often have autozooids with and also without opesiules (cf.
<bibRefCitationid="EFED4B309640FF98F359FD90FCC3FDDA"author="Schubert T."box="[626,804,579,605]"pageId="54"pageNumber="55"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
: pl. 8, fig. 3). As the zooids without opesiules are of primary origin and cannot have been destroyed during preparation or other processes, he concluded that the occurrence of opesiules is not species-specific and cannot be considered an argument for the existence of
stage as an ‘end-member’ of a parallel development by progressive calcification of the cryptocyst from the Coniacian to the Maastrichtian resulting in the formation of two opesiules. Zooids with advanced calcification of the cryptocyst, however, did not completely replace the
<bibRefCitationid="EFED4B309640FF98F196FCA8FEB3FC12"author="Voigt E."box="[189,340,891,917]"pageId="54"pageNumber="55"pagination="505 - 522"refId="ref33080"refString="Voigt E. 1991. Mono- or polyphyletic evolution of cheilostomatous bryozoan divisions? In: Bigey F. (ed) Bryozoaires actuels et fossiles: Bryozoa living and fossil. Articles presentes a la 8 e Conference Internationale sur les Bryozoaires, Paris, 1989: Papers presented at the 8 th International Conference on Bryozoa, Paris, 1989: 505 - 522. Societe des Sciences Naturelles de l'Ouest de la France, Nantes."type="journal article"year="1991">Voigt (1991)</bibRefCitation>
) as separate species. He saw the four species as an example of an intermediate status between onychocellid pseudomalacostegans and microporid or thalamoporellid coilostegans, placing
<bibRefCitationid="EFED4B309640FF98F336FB9AFD11FBE4"author="Favorskaya T. A."box="[541,758,1097,1123]"pageId="54"pageNumber="55"pagination="115 - 136"refId="ref30441"refString="Favorskaya T. A. 1992. Мsaнki kaмpaнa i мaaсtрikta Юga СССР [Campanian and Maastrichtian bryozoans of the southern USSR]. In: Okuneva T. M., Titova M. V., Favorskaya T. A., Zonova T. D. & Rostovtsev K. O. (eds) Atlas rukovodyashchikh grupp fauny mesozoya Yuga i Vostoka SSSR. Trudy Vserossiyskogo Nauchno-issledovatelskogo Geologicheskogo Instituta, new series 350: 115 - 136. Nedra, St Petersburg."type="book chapter"year="1992">Favorskaya (1992)</bibRefCitation>
<bibRefCitationid="EFED4B309640FF98F3CEFB27FC0AFA89"author="Koromyslova A. V."box="[741,1005,1268,1294]"pageId="54"pageNumber="55"pagination="275 - 286"refId="ref30825"refString="Koromyslova A. V. 2014 a. Morphological features and systematic position of the bryozoans Onychocella rowei and O. mimosa (Cheilostomata) from a Campanian erratic block (Belarus). Paleontological Journal 48 (3): 275 - 286. https: // doi. org / 10.1134 / S 0031030114030137"type="journal article"year="2014">Koromyslova (2014a)</bibRefCitation>
. As she showed, the two species are not conspecific and differ in the shape of the autozooidal opesia and in the cryptocyst that develops opesiular indentations in
shows only avicularia with short rostra and short trough-like apices (
<bibRefCitationid="EFED4B309640FF98F1EEFA14FE5BFA65"author="Koromyslova A. V."box="[197,444,1479,1506]"pageId="54"pageNumber="55"pagination="275 - 286"refId="ref30825"refString="Koromyslova A. V. 2014 a. Morphological features and systematic position of the bryozoans Onychocella rowei and O. mimosa (Cheilostomata) from a Campanian erratic block (Belarus). Paleontological Journal 48 (3): 275 - 286. https: // doi. org / 10.1134 / S 0031030114030137"type="journal article"year="2014">Koromyslova 2014a</bibRefCitation>
<bibRefCitationid="EFED4B309640FF98F43AF99CFF1BF90A"author="Brydone R. M."pageId="54"pageNumber="55"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone 1930</bibRefCitation>
: pl. 28, figs 1–2), as well as the material from the collection of E. Voigt (
<figureCitationid="13472A449640FF98F5BAF9A1FB11F90A"box="[1169,1270,1650,1677]"captionStart="Fig"captionStartId="48.[189,232,1535,1561]"captionTargetBox="[269,1318,267,1498]"captionTargetId="figure@48.[269,1318,267,1498]"captionTargetPageId="48"captionText="Fig. 18. Rhagasostoma rowei (Brydone, 1906). A. SMF 29932, early Maastrichtian, Rügen, Germany, overview of erect bifoliate stem-like then dichotomously branching colony. B–C. SMF 29925, early Maastrichtian, Island of Møn, Denmark. B. Overview of erect bifoliate stem-like then dichotomously branching colony. C. Opesia and opesiules of avicularium. D. SMF 29933, late Maastrichtian, former brick factory, Hamburg-Hummelsbüttel, Germany, showing the parallel-sided base of erect bifoliate colony with rare avicularia. E. TsNIGR Museum 36/9757, late Maastrichtian, Turkmenistan, Tuarkyr, showing the parallel-sided base of erect bifoliate colony with rare avicularia. F–H. Maastrichtian, Kazakhstan, Mangyshlak Peninsula. F–G. PIN 3421/1009. F. Erect bifoliate colony, almost parallelsided but widening distally. G. The widest part of the colony showing autozooids and numerous avicularia. H. PIN 3421/1008, showing autozooids with long cryptocystal tongues, and avicularia. I. TsNIGR Museum 32/9757, late Maastrichtian, Turkmenistan, western Kopetdag, showing ovicellate (arrows) and non-ovicellate autozooids with long cryptocystal tongues, and avicularia. J. PIN 5502/3050, Maastrichtian, Kazakhstan, northern Aral Sea Region, showing autozooids and avicularia. Scale bars: A–B, D, H, J = 1 mm; C = 100 µm; E–G = 2 mm; I = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830883"httpUri="https://zenodo.org/record/3830883/files/figure.png"pageId="54"pageNumber="55">Fig. 18I</figureCitation>
,
<figureCitationid="13472A449640FF98F42DF9A0FADFF90A"box="[1286,1336,1651,1677]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="54"pageNumber="55">19C</figureCitation>
) and T.A. Favorskaya (
<figureCitationid="13472A449640FF98F0BCF945FE0AF937"box="[407,493,1686,1712]"captionStart="Fig"captionStartId="50.[189,232,1678,1704]"captionTargetBox="[189,1398,265,1621]"captionTargetId="figure@50.[189,1399,265,1621]"captionTargetPageId="50"captionText="Fig. 19. Rhagasostoma mimosa (Brydone, 1930). A–B. Lectotype, SM B36696, early Maastrichtian (Ostrea lunata Zone), Porosphaera Beds of Trimingham, Norfolk, England, UK. A. Part of erect bifoliate colony showing ovicellate (some ooecia arrowed) and non-ovicellate autozooids and aviacularia. B. Detail of autozooids with opesiules and some with vestigial ooecia (arrowed), and avicularia. C. SMF 29923, early Maastrichtian, Island of Møn, Denmark, bifurcating colony showing autozooids some opesiules and avicularia. D–F. Early Maastrichtian of an unknown locality on the Mangyshlak Peninsula, Mangystau Region, Kazakhstan. D–E. PIN 5502/3057. D. Part of erect bifoliate colony showing autozooids and aviacularia. E. Detail of autozooids with opesiules and avicularia. F. PIN 5502/3056, autozooids with opesiules and avicularia. Scale bars: A = 200 µm; B = 100 µm; C = 1 mm; D = 2 mm; E–F = 500 µm."figureDoi="http://doi.org/10.5281/zenodo.3830885"httpUri="https://zenodo.org/record/3830885/files/figure.png"pageId="54"pageNumber="55">Fig. 19</figureCitation>
because the autozooids lack opesiules. As already discussed by
<bibRefCitationid="EFED4B309640FF98F2FFF90FFB74F971"author="Brydone R. M."box="[980,1171,1756,1782]"pageId="54"pageNumber="55"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone (1930)</bibRefCitation>
and
<bibRefCitationid="EFED4B309640FF98F5FDF90FFA95F970"author="Voigt E."box="[1238,1394,1756,1783]"pageId="54"pageNumber="55"pagination="5 - 95"refId="ref32804"refString="Voigt E. 1967. Oberkreide-Bryozoen aus den asiatischen Gebieten der UdSSR. Mitteilungen aus dem Geologischen Staatsinstitut in Hamburg 36: 5 - 95."type="journal article"year="1967">Voigt (1967)</bibRefCitation>
having opesiae that are round instead of bell-shaped and opesiules instead of opesiular indentions. The presence of autozooids with opesiular indentations in colonies of
in most cases can be explained by post-mortem destruction of the cryptocystal tongue that separated the opesiules from the opesia, or by the fact that the opesiae and opesiules of these autozooids were not formed fully and they were in the
<bibRefCitationid="EFED4B309640FF98F5EEF85FFA94F821"author="Schubert T."box="[1221,1395,1932,1958]"pageId="54"pageNumber="55"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
<bibRefCitationid="EFED4B309641FF99F1EEFE8DFE22FEFF"author="Koromyslova A. V."box="[197,453,350,376]"pageId="55"pageNumber="56"pagination="275 - 286"refId="ref30825"refString="Koromyslova A. V. 2014 a. Morphological features and systematic position of the bryozoans Onychocella rowei and O. mimosa (Cheilostomata) from a Campanian erratic block (Belarus). Paleontological Journal 48 (3): 275 - 286. https: // doi. org / 10.1134 / S 0031030114030137"type="journal article"year="2014">Koromyslova 2014a</bibRefCitation>
<bibRefCitationid="EFED4B309641FF99F013FE52FE14FE1B"author="Schubert T."box="[312,499,385,412]"pageId="55"pageNumber="56"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
<bibRefCitationid="EFED4B309641FF99F51CFE52FB2FFE1B"author="Voigt E."box="[1079,1224,385,412]"pageId="55"pageNumber="56"pagination="5 - 95"refId="ref32804"refString="Voigt E. 1967. Oberkreide-Bryozoen aus den asiatischen Gebieten der UdSSR. Mitteilungen aus dem Geologischen Staatsinstitut in Hamburg 36: 5 - 95."type="journal article"year="1967">Voigt 1967</bibRefCitation>
: unknown locality on the Mangyshlak Peninsula, Mangystau Region (
<bibRefCitationid="EFED4B309641FF99F504FE76FAEDFE38"author="Favorskaya T. A."box="[1071,1290,421,447]"pageId="55"pageNumber="56"pagination="115 - 136"refId="ref30441"refString="Favorskaya T. A. 1992. Мsaнki kaмpaнa i мaaсtрikta Юga СССР [Campanian and Maastrichtian bryozoans of the southern USSR]. In: Okuneva T. M., Titova M. V., Favorskaya T. A., Zonova T. D. & Rostovtsev K. O. (eds) Atlas rukovodyashchikh grupp fauny mesozoya Yuga i Vostoka SSSR. Trudy Vserossiyskogo Nauchno-issledovatelskogo Geologicheskogo Instituta, new series 350: 115 - 136. Nedra, St Petersburg."type="book chapter"year="1992">Favorskaya 1992</bibRefCitation>
<bibRefCitationid="EFED4B309641FF99F3E5FE1AFC65FE64"author="Brydone R. M."box="[718,898,457,483]"pageId="55"pageNumber="56"refId="ref29975"refString="Brydone R. M. 1930. Further Notes on New or Imperfectly Known Chalk Polyzoa. Part II. (Vincularia, Onychocella, Rhagasostoma, Porina, etc.). Dulau and Co., London."type="book"year="1930">Brydone 1930</bibRefCitation>
: southern Aral Sea Region, Republic of Karakalpakstan (
<bibRefCitationid="EFED4B309641FF99F335FE3FFD14FD80"author="Favorskaya T. A."box="[542,755,492,519]"pageId="55"pageNumber="56"pagination="115 - 136"refId="ref30441"refString="Favorskaya T. A. 1992. Мsaнki kaмpaнa i мaaсtрikta Юga СССР [Campanian and Maastrichtian bryozoans of the southern USSR]. In: Okuneva T. M., Titova M. V., Favorskaya T. A., Zonova T. D. & Rostovtsev K. O. (eds) Atlas rukovodyashchikh grupp fauny mesozoya Yuga i Vostoka SSSR. Trudy Vserossiyskogo Nauchno-issledovatelskogo Geologicheskogo Instituta, new series 350: 115 - 136. Nedra, St Petersburg."type="book chapter"year="1992">Favorskaya 1992</bibRefCitation>
<bibRefCitationid="EFED4B309641FF99F1EEFDC3FE9EFDAC"author="Schubert T."box="[197,377,528,555]"pageId="55"pageNumber="56"pagination="3 - 83"refId="ref32104"refString="Schubert T. 1986. Parallele Merkmalsentwicklung der Bryozoen-Arten von Woodipora Jullien 1888 im Coniacium bis Maastrichtium NW-Europas. Geologisches Jahrbuch A 98: 3 - 83."type="journal article"year="1986">Schubert 1986</bibRefCitation>
<bibRefCitationid="EFED4B309641FF99F066FDE7FE3EFDC8"author="Voigt E."box="[333,473,564,591]"pageId="55"pageNumber="56"pagination="5 - 95"refId="ref32804"refString="Voigt E. 1967. Oberkreide-Bryozoen aus den asiatischen Gebieten der UdSSR. Mitteilungen aus dem Geologischen Staatsinstitut in Hamburg 36: 5 - 95."type="journal article"year="1967">Voigt 1967</bibRefCitation>