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11 results for “Cheiruridae”
Fig. 8 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 8. Reconstructions of cranidia (A1–E1) and pygidia (A2–E2) of different members of the subfamily Pilekiinae. A. Anacheirurus adserai (Vela and Corbacho, 2008). B. Parapilekia olesnaensis (Růžička, 1935), based on Mergl (2006). C. Tesselacauda depressa Ross, 1951, based on Adrain and Karim (2019). D. Landyia elizabethae Jell, 1985, based on Jell (1985). E. Macrogrammus rafi Edgecombe, Chatterton, Vaccari, and Waisfeld, 1999, based on Edgecombe et al. (1999).
Fig. 2 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 2. Cheirurid trilobites Anacheirurus adserai (Vela and Corbacho, 2007) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco (A, B) and Lehua vinculum (Barrande, 1852) from the Dobrotivá Formation, upper Darriwilian to lowermost Sandbian, Zaječov-Svatá Dobrotivá, Czech Republic (C–E). A. YPM 522182, part, complete holaspid with hypostome impressed. B. YPM 530933, complete holaspid. C. NM L19066, complete holaspid. D. NM L19075, complete cranidium. E. JV1607, anterior half of an holaspid specimen. Specimens in C–E covered by ammonium chloride.
Fig. 9 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 9. Biramous appendages reconstruction for the cheirurid trilobite Anacheirurus adserai, showing the anterior (A) and the posterior (B) morphology. Dashed lines indicate inferred proximal parts of the appendages.
Fig. 5 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 5. Endopodites of the cheirurid trilobite Anacheirurus adserai (Vela and Corbacho, 2007) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. A. Part of YPM 226573, general view (A1), close-up of the endopodites (A2) and explanatory drawing (A4), close-up of the distal claw (A3) and explanatory drawing (A5). B. Counterpart of YPM 226573, general view (B1), close up of the endopodites (B2) and explanatory drawing (B3), close up of the endopodites (B4) and explanatory drawing (B5), close up of the area pointed out in B4 (B6), arrows showing long endites on podomere 2 and 3. Numbers represent podomere number. Abbreviations: ar, axial ring.
Fig. 7 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 7. Exopodities of the cheirurid trilobite Anacheirurus adserai (Vela and Corbacho, 2007) (YPM 517074) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. Photographs: general view (A1), close-up of the exopodites (A2) and explanatory drawing (A3), close up to the ninth exopodite (A4) and explanatory drawing (A5). Scale bars 1 mm. Abbreviations: ar, axial ring; ex, exopodite.
Fig. 1 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 1. Cheirurid trilobite Anacheirurus adserai (Vela and Corbacho, 2007) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. A. MGL 102179, complete specimen (A1) and anterior region of the counterpart (A2); arrow pointing the antennae. B. MGL 102170, close-up of the posterior region of the trunk; arrow pointing the disarticulated pygidium. C. ML20-269198, latex cast of the counterpart. D. YPM 525125, close up of the posterior region of the trunk; arrow pointing the articulation between the thorax and the pygidium. Specimens in A1 and C coated with ammonium chloride. Scale bars 1 mm.
Fig. 6 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 6. Cheirurid trilobite Anacheirurus adserai (Vela and Corbacho, 2007) (MGL 102172) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. Photographs under alcohol: general view (A1), close-up of the exopodites A2) and explanatory drawing (A3). Scale bars 1 mm. Abbreviations: ar, axial ring.
Fig. 11 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 11. Ordovician diversity of Cheiruridae species across individual time slices, as defined in Adrain (2013). The dashed line represents the boundary between Tremadocian and Floian; blue, members of the subfamily Pilekiinae; red, members of the rest of Cheiruridae subfamilies excluding pilekiids. Data based on Adrain (2013, personal communication 2020).
Fig. 10 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 10. Trilobite exopodite reconstructions grouped by geological age. A. Eoredlichia intermediata (Lu, 1940), based on Ramsköld and Edgecombe 1996). B. Hongshiyanaspis yiliangensis Zhang and Lin in Zhang et al., 1980, based on Zeng et al. (2017). C. Redlichia rex Holmes, 2019, based on Holmes et al. (2019). D. Olenoides serratus (Rominger, 1887), based on Whittington 1980). E. Anacheirurus adserai (Vela and Corbacho, 2007). F. Ceraurus pleurexanthemus Green, 1832, based on Størmer (1951). G. Triarthrus eatoni (Hall, 1838), based on Whittington and Almond (1987). H. Cryptolithus bellulus (Ulrich, 1879), based on Campbell (1975). I. Chotecops ferdinandi Kayser, 1880), based on Bruton and Haas (1999).
Fig. 3 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 3. Juveniles of the cheirurid trilobite Anacheirurus adserai from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. A. MGL 104146, late meraspid stage. B. MGL 102153, early holaspid stage. C. MGL 104533, early holaspid stage. Specimens in B, C covered by ammonium chloride. Scale bars 1 mm.
Fig. 4 in Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae
Fig. 4. Endopodites of the cheirurid trilobite Anacheirurus adserai (Vela and Corbacho, 2007) from the Fezouata Shale, Araneograptus murrayi Zone, Tremadocian, Lower Ordovician, near Beni Zouli, Zagora Province, Morocco. A. MGL 103863, photograph under alcohol with polarized light (A1), explanatory drawing with podomere numbers (A2). B. MGL 102225, photograph under alcohol with polarized light (B1), explanatory drawing with endopodite numbers (B2). Scale bars 1 mm. Abbreviations: ar, axial ring.
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