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55 results for “Eubrachyura”
FIG. 7. — Archaeochiapasa mardoqueoi n. gen., n in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 7. — Archaeochiapasa mardoqueoi n. gen., n. sp., Chiapas, El Chango quarry, lower Cenomanian Cintalapa Member of Sierra Madre Formation, G. Carbot-Chanona coll., holotype, male, 10.3 × 11.1 mm (IHNFG-5616): dorsal view, with proximal part of pleon (actually a1-a3) dorsally visible. Abbreviations: a1, pleonal somite 1; fl, flange; p.c., concave posterior border of carapace; r, thickened carapace border. Scale bar: 5 mm.
FIG. 16 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 16. — Inachoididae Dana, 1851 (Majoidea Samouelle, 1819): A, Paulita tuberculata (Lemos de Castro, 1949) (Inachoididae), male 19.1 × 19.7 mm, French Guiana, Durand coll. 1958, MNHN-IU-2017-8286 (= MNHN-B19506): carapace (modified, after Guinot 2012: fig. 2A); B, Paradasygyius depressus (Bell, 1835), male, México, Bahía Santa Inés, M. E. Hendrickx det. and leg. 1988, MNHN-IU-2017-8270 (= MNHN-B20818): thoracic sternum (after Guinot 2012: fig. 3C); C, Paulita tuberculata (Lemos de Castro, 1949), male 21.0 × 21.8 mm, Brazil, Recife, Coelho det. et leg. 1981, MNHN-IU-2017-9099 (= MNHN-B19509): carapace, ventral anterior view (after Guinot 2012: fig. 2B). Abbreviations: a1, first pleonal somite; cx1, cx5, P1, P5 coxae; e, exposed pleurites; e5-e8, exposed pleurites 5-8; j, thoracic sternum/pterygostome junction; M.o., Milne Edwards openings; pt, pleotelson (somite 6 fused to telson); 3-8, thoracic sternites 3-8; 3/4-7/8, sternal sutures 3/4-7/8.
FIG. 11. — Archaeochiapasa mardoqueoi n. gen., n in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 11. — Archaeochiapasa mardoqueoi n. gen., n. sp., male 10.3 × 11.1 mm, holotype (IHNFG-5616): thoracic sternum and pleon. Abbreviations: a4-a6, pleonal somites 4-6; t, telson; 3-8, thoracic sternites 3-8; 4/5, 5/6, 7/8, sternal sutures 4/5, 5/6, 7/8. Scale bar: 3 mm.
FIG. 4 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 4. — Stratigraphic section of the Sierra Madre Formation, showing relative position of deposits that crop out at El Chango, sedimentological structures and fossil distribution.
FIG. 5. — Archaeochiapasa mardoqueoi n. gen., n in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 5. — Archaeochiapasa mardoqueoi n. gen., n. sp., holotype, male Chiapas, El Chango quarry, lower Cenomanian Cintalapa Member of the Sierra Madre Formation (IHNFG-5616): A, specimen whitened with ammonium chloride; B, specimen submerged in water. See first three dorsally positioned pleonal somites, extremely long P2, P3, and a reduced last pereiopod, P4 or P5. Scale bar: A, B, 0.5 cm.
FIG. 3 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 3. — Crustaceans from El Chango quarry, Cenomanian (A-D, shrimps; E, Palinura; F-H, crabs): A, Zoquepenaeus spinirostratus Garassino, Vega, Calvillo- Canadell, Cevallos-Ferriz & Coutiño, 2013; B, Tzeltalpenaeus exilichelatus Garassino, Vega, Calvillo-Canadell, Cevallos-Ferriz & Coutiño, 2013; C, Mexicania grijalvaensis Garassino, Vega, Calvillo-Canadell, Cevallos-Ferriz & Coutiño, 2013; D, Mokaya changoensis Garassino, Vega, Calvillo-Canadell, Cevallos-Ferriz & Coutiño, 2013; E, undetermined Palinuridae Latreille, 1802; F, undetermined cenomanocarcinid (podotreme crab, Cenomanocarcinidae Guinot, Vega & Van Bakel, 2008); G, H, undetermined?Tepexicarcinidae Luque, 2015 (Eubrachyura) in dorsal (G) and ventral (H) views. Scale bars: A-D, F-H, 1 cm; E, 3 mm.
FIG. 2. — A, B in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 2. — A, B, Outcrops of the Cintalapa Member of the Sierra Madre Formation at El Chango locality; C, D, Cupressaceae conifers; E, Angiosperm fruit; F, unidentified bony fish; G, bony fish, Saurorhamphus sp.; H, bony fish, Zoqueichthys carolinae Alvarado-Ortega & Than-Marchese, 2012 (Teleostei, Acanthomorpha, Aipichthyoidea); I, bony fish, Unicachichthys multidentata Díaz-Cruz, Alvarado-Ortega & Carbot-Chanona, 2016 (Teleostei, Euteleosteomorpha, Enchodontodei). Scale bars: C, D, G, H, 1 cm.
FIG. 1. — A in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 1. — A, Location map of study area in Chiapas, southeastern Mexico; B, detailed map with location of El Chango quarry, southwest of Tuxtla Gutiérrez, Chiapas State (from Google Earth).
FIG. 13 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 13. — Lecythocaridae Schweitzer & Feldmann, 2009 (Glaessneropsoidea Patrulius, 1959): A, Lecythocaris paradoxa (von Meyer, 1858), Oberjura-Massenkalke Formation, late Jurassic, latest Kimmeridgian, Beckeri Zone, Oerlinger Tal near Ulm, Germany: cast of neotype, 5.5 × 5.2 mm (GPIT/58/26/11); B, Prolecythocaris hauckei Schweigert & Robins, 2016, early Kimmeridgian, Arzbzeg Formation, Hypselocyclum Zone, Titting, Bavaria, Germany: holotype 3.6 × 4.0 mm, in cuticle preservation (SMNS 70326/1) (see Schweigert & Robins 2016: fig. 2C, A, respectively); C, Prolecythocaris rieberi Schweigert, 2019, Upper Jurassic, Oberjura-Massenkalk Formation, late Kimmeridgian, Acanthicum Zone, Donzdorf, southwestern Germany: holotype, 3.6 × 4.0 mm (SMNS 70451) (Schweigert 2019: fig. 2A): see the inflated subhepatic regions. Abbreviations: p.c., concave posterior border of carapace; fl, flange. All photographs by Günter Schweigert and courtesy of G. Schweigert. Scale bars: 2 mm.
FIG. 14 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 14. — Dorippidae MacLeay, 1838 (Dorippoidea MacLeay, 1838): Medorippe lanata (Linnaeus, 1767), male, Mediterranean Sea (MNHN, skeleton prepared by S. Secretan): thoracic sternum, without pleon. Abbreviations: b.p., press-button located in curved sternal suture 5/6; cx1, cx5, P1, P5 coxae; G1, G1, first and second gonopods; j, sternum/pterygostome junction; m.o., Milne Edwards opening as pterygostomial slit; P, perforation at the end of sternal suture 3/4; 3-8, thoracic sternites 3-8; 3/4-6/7, sternal sutures 3/4-6/7. Photography by Barry van Bakel and courtesy of B. van Bakel. Scale bar: 1 cm.
FIG. 15 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 15. — Telamonocarcinidae Larghi, 2004 (Dorippoidea MacLeay, 1838): thoracic sternum of Telamonocarcinus gamabalatus Larghi, 2004, Sannine Formation, Cenomanian, Hadjoula, Lebanon (AO467, Private Collection Àlex Ossó). Photography by Àlex Ossó and courtesy of À. Ossó.
FIG. 8. — Archaeochiapasa mardoqueoi n. gen., n in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 8. — Archaeochiapasa mardoqueoi n. gen., n. sp., male 10.3 × 11.1 mm, holotype (IHNFG-5616): superposition of the decorticated crab carapace and the counterpart with cuticle to show ornamentation of dorsal surface. Abbreviation: fl, flange. Scale bar: 5 mm.
FIG. 6. — Archaeochiapasa mardoqueoi n. gen., n in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 6. — Archaeochiapasa mardoqueoi n. gen., n. sp. holotype, male (IHNFG-5616). A, specimen photographed in situ at El Chango quarry; B-D, steinkern (counterpart): B, illuminated with oblique yellow light; C, illuminated with incident light and coated with ammonium chloride; D, illuminated with oblique, blue light and submerged in water. Scale bars: A, 1 cm; B-D, 5 mm.
FIG. 18 in Archaeochiapasidae n. fam., a new early Cenomanian brachyuran family from Chiapas, Mexico, new hypothesis on Lecythocaridae Schweitzer & Feldmann, 2009, and phylogenetic implications (Crustacea, Decapoda, Brachyura, Eubrachyura)
FIG. 18. — Hymenosomatidae MacLeay, 1838 (Hymenosomatoidea MacLeay, 1838): A, generalised hymenosomatid based on Halicarcinus cookii (Filhol, 1885) (modified, after Melrose 1975: fig. 1); B, Trigonoplax unguiformis (De Haan, 1839), Japan: thoracic sternum (much widened) of 3rd young stage crab (modified, after Fukuda 1981: fig. 3D): C, Halicarcinus planatus (Fabricius, 1775), MNHN-IU-2014-11916 (= MNHN-B25960): thoracic sternum (modified, after Guinot 1979: fig. 30A). Abbreviations: c.ca.cx1, arthrodial cavity of P1 coxa; cx5, P5 coxa; mxp3, external maxillipeds; b.p., location of press-button for pleonal locking; r, hymenosomian rim, all around carapace margin; 1-8, thoracic sternites 1-8; 3/4-7/8, sternal sutures 3/4-7/8.
FIG. 4. — A, B in New occurrences of crabs (Decapoda, Brachyura, Eubrachyura) in the Pliocene of Florida (United States)
FIG. 4. — A, B, Persephona subovata (Rathbun, 1893) type material: A, USNM 17385 (as Myra subovata Rathun, 1893); B, USNM 69260 (as Iliacantha hancocki Rathbun, 1935), (photographs by Karen Reed); C, Paractaea rufopunctata (H. Milne Edwards, 1834) from Surigao Island, Philippines (Crab Database) (photograps by Ondřej Radosta); D, Paractaea nodosa (Stimpson, 1860) from Guadeloupe (from Legall & Poupin [2018]) (photographs by Joseph Poupin).
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