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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.

opencc-by-4.0Apr 2020View details →

Reconstructing development of the earliest seed integuments raises a new hypothesis for the evolution of ancestral seed‐bearing structures

This dataset contains three-dimensional model files for Genomosperma specimens LM19 (K1; Long, 1960), LM22, LM1 (L1; Long, 1960), and LM23, supporting the paper ‘Reconstructing development of the earliest seed integuments raises a new hypothesis for the evolution of ancestral seed‐bearing structures' published in New Phytologist <a href="https://doi.org/10.1111/nph.16792">https://doi.org/10.1111/nph.16792</a>. These models are saved in a single ZIP compressed folder as four SPV files and also four VAXML datasets in separate folders. All files are labelled with the working/specimen number they represent. SPV files are able to be viewed in SPIERSview, part of the free SPIERS software package (http://spiers-software.org/). The VAXML datasets comprise a VAXML file that provides metadata specifying how to put together accompanying STL files which define the geometry of the objects in the dataset. [Unzipped total size 1.74GB].

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Data from: Developing a Stopover-CORT hypothesis: corticosterone predicts body composition and refueling rate in Gray Catbirds during migratory stopover

Migratory flight is energetically challenging, requiring alternating phases of fuel catabolism and fuel accumulation, accompanied by dramatic changes in body composition and behavior. Baseline corticosterone (CORT; the primary glucocorticoid in birds) is thought to underlie transitions between fuel catabolism during flight, fuel deposition during stopover, and the initiation of migratory flight. However, studies of CORT on stopover physiology and behavior remain disparate efforts, lacking the cohesion of a general hypothesis. Here we develop a Stopover-CORT hypothesis formalizing the relationships among CORT, body condition, and refueling rate in migratory birds. First we expect body mass to increase with triglycerides (TRIG) as birds refuel. Second, based on a synthesis of previous literature, we predict a U-shaped CORT curve over the course of stopover, postulating that elevated CORT at arrival is reactive, responding to poor body condition, while CORT elevation before departure is preparative, driving changes in behavior and body condition. We tested these predictions in Gray Catbirds (Dumetella carolinensis) following a trans-Gulf flight during spring migration. We found baseline CORT was negatively correlated with body condition and TRIG, corresponding with our predictions for arriving and refueling—but not departing—birds. It is possible catbirds undergo regional habitat translocations rather than complete the entire stopover phase at our study site. We propose the Stopover-CORT hypothesis as a useful predictive framework for future studies of the mechanistic basis of stopover physiology. By studying the regulation of stopover refueling and departure, we may better understand physiological limitations to overall migration rate and improve assessments of habitat quality for refueling birds.

opencc-zeroMay 2020View details →

Figure 9 from: George KH (2020) Restructuring the Ancorabolidae Sars (Copepoda, Harpacticoida) and Cletodidae T. Scott, with a new phylogenetic hypothesis regarding the relationships of the Laophontoidea T. Scott, Ancorabolidae and Cletodidae. Zoosystematics and Evolution 96(2): 455-498. https://doi.org/10.3897/zse.96.51349

Figure 9 P1 of A.Laophontodes monsmaris George, 2018, B.Ancorabolina divasecunda Gheerardyn & George, 2010, C.Arthropsyllus serratus Sars, 1909, D.Ancorabolus chironiSchulz and George; 2010. Modified from George 2018 (A), Gheerardyn and George 2010 (B), Conroy-Dalton and Huys 2000 (C), Schulz and George 2010 (D). No scales.

Figure 10 from: George KH (2020) Restructuring the Ancorabolidae Sars (Copepoda, Harpacticoida) and Cletodidae T. Scott, with a new phylogenetic hypothesis regarding the relationships of the Laophontoidea T. Scott, Ancorabolidae and Cletodidae. Zoosystematics and Evolution 96(2): 455-498. https://doi.org/10.3897/zse.96.51349

Figure 10 Cuticular body processes of A.Arthuricornua anendopodia Conroy-Dalton, 2001, B.Dorsiceratus ursulae George, 2006, C.Breviconia australis (George, 1998), D.Ancorabolus inermis Conroy-Dalton & Huys, 2000. Modified after Conroy-Dalton 2001 (A), George 2006b (B), George 1998a (C), Conroy-Dalton and Huys 2000 (D). No scales.

Figure 3 from: George KH (2020) Restructuring the Ancorabolidae Sars (Copepoda, Harpacticoida) and Cletodidae T. Scott, with a new phylogenetic hypothesis regarding the relationships of the Laophontoidea T. Scott, Ancorabolidae and Cletodidae. Zoosystematics and Evolution 96(2): 455-498. https://doi.org/10.3897/zse.96.51349

Figure 3 Schematic representation of hypothesised groundpatterns for the shapes of the first swimming leg P1 in each proposed taxon. A. Podogennontan (after Willen 2000; Seifried 2003), B.Laophontoidea–Cletodoidea-clade, C.Cletodoidea, D.Cletodidae ●, E.Ancorabolidae ●. Black crosses indicate apomorphies; Roman numerals = outer spines, Arabic numerals = inner setae; ex = exopod, en = endopod. Explanations given in the text.

Figure 4 from: George KH (2020) Restructuring the Ancorabolidae Sars (Copepoda, Harpacticoida) and Cletodidae T. Scott, with a new phylogenetic hypothesis regarding the relationships of the Laophontoidea T. Scott, Ancorabolidae and Cletodidae. Zoosystematics and Evolution 96(2): 455-498. https://doi.org/10.3897/zse.96.51349

Figure 4 Antennulae (A1) of A.Enhydrosoma parapropinquum Gómez, 2003, B.Cletodes meyerorum George & Müller, 2013, C.Bicorniphontodes bicornis (A. Scott, 1896), D.Ancorabolina divasecunda Gheerardyn & George, 2010. Arrows indicate gradual elongation. Modified after Gómez 2003 (A), George and Müller 2013 (B), George and Gheerardyn 2015 (C), Gheerardyn and George 2010 (D). No scales.

Figure 1 from: George KH (2020) Restructuring the Ancorabolidae Sars (Copepoda, Harpacticoida) and Cletodidae T. Scott, with a new phylogenetic hypothesis regarding the relationships of the Laophontoidea T. Scott, Ancorabolidae and Cletodidae. Zoosystematics and Evolution 96(2): 455-498. https://doi.org/10.3897/zse.96.51349

Figure 1 Representatives of "Ancorabolidae" Sars, 1909, A.Ancorabolus ilvae George, 2001, B.Ancorabolina chimaera George, 2006, C.Ceratonotus vareschii George, 2006, D.Laophontodes typicus T. Scott, 1894, E.Paralaophontodes anjae George, 2017. Modified from George 2001 (A), 2006a (B), 2006b (C), 2017 (D), 2018 (E). No scales.