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Fig. 4 in Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses-et-Veyran, Montagne Noire

Fig. 4. Trimerocephalus (Trifoliops) trifolius (Osmólska, 1958) subgen. nov. Montagne Noire, France, Famennian, Upper Devonian. A. Reconstruction of a mature cephalon, in dorsal view. B. Reconstruction of a young cephalon, in dorsal view. Scale bars 1 mm.

Fig. 3. A in Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses-et-Veyran, Montagne Noire

Fig. 3. A. Trimerocephalus (Trifoliops) trifolius (Osmólska, 1958) subgen. nov. Montagne Noire, France, Famennian, Upper Devonian. Reconstruction of the cephalon, in dorsal (A1) and in ventral (A2) views. B. Trimerocephalus (Trifoliops) nigritus subgen. et sp. nov. Montagne Noire, France, Famennian, Upper Devonian. Reconstruction of the cephalon, in dorsal (B1) and in ventral (B2) views. Scale bars 1 mm.

Fig. 5 in Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses-et-Veyran, Montagne Noire

Fig. 5. Scatter diagram of length (cm) versus width (cm) of cephalon and glabella in specimens of Trimerocephalus (Trifoliops) trifolius (Osmólska, 1958) subgen. nov, Trimerocephalus (Trifoliops) nigritus subgen. et sp. nov. and Trimerocephalus? trifolius, the specimen ilustrated (ZPAL Tr. D. I/16) by Osmólska in 1963.

Fig. 1 in Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses-et-Veyran, Montagne Noire

Fig. 1. Location map of the old quarry of Concours−le−Haut at Causses−et−Veyran, in Montagne Noire, southern of the France.

Fig. 6 in Systematic relationships of the blind phacopine trilobite Trimerocephalus, with a new species from Causses-et-Veyran, Montagne Noire

Fig. 6. Trimerocephalus (Trifoliops) nigritus subgen. et sp. nov. Concours−le−Haut, Causses−et−Veyran, Montagne Noire, Famennian, Upper Devonian. Samples housed in the collection USTL/CC of the Laboratory of Paleontology of Montpellier (France). Photographs of calcareous shells. A. Cephalon, USTL/CC018, in dorsal (A1), frontal (A2), lateral (A3), and ventral (A4) views; × 3. B. Cephalon, USTL/CC019, in dorsal (B1) and lateral (B2) views; × 5. C. Cephalon, USTL/CC020, in dorsal (C1), ventral (C2), and lateral (C3) views; × 5. D. Cephalon, USTL/CC021, in dorsal (D1) and lateral (D2) views; × 10. E. Cephalon, USTL/CC022, in ventral view, × 5. F. Cephalon, USTL/CC023, in ventral view, × 5. G. Pygidium, USTL/CC024, in frontal (G1) and dorsal (G2) views; × 7. H. Pygidium, USTL/CC025, in dorsal (H1) and frontal (H2) views; × 5.

FIGURE 5 in A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland

FIGURE 5. Graphical representation of the seven distinct size categories within meraspid degrees M9 and M10 of Trimerocephalus chopini n. sp., based on measurements of hundreds of queue specimens from Kowala Quarry (see Radwański et al., 2009). Meraspides are shown in dorsal view.

FIGURE 2 in A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland

FIGURE 2. Partially complete meraspis (degree M10; librigenae absent) of Trimerocephalus chopini n. sp. from Early Famennian marly shales at Kowala Quarry, Holy Cross Mountains, central Poland. A and B: Dorsal and oblique lateral views, respectively. C: Enlargement of pygidium.

FIGURE 3 in A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland

FIGURE 3. Meraspides (degrees M8-M10) of Trimerocephalus chopini n. sp. from Early Famennian marly shales at Kowala Quarry, Holy Cross Mountains, central Poland. A: Incomplete, exfoliated, dorso-laterally deformed meraspis M8 in dorsal view (pygidium is absent). B: Almost complete meraspis M9 in dorsal view (pygidium is not intact). C: Complete, slightly deformed meraspis M8 with partially visible pygidium, in dorsal view. D and E: Nearly complete, slightly deformed meraspis M10 (librigenae absent) in oblique posterior and dorsal views, respectively. F: Incomplete and dorsally deformed meraspis M10 (holotype; ZPAL Tr.8/12.02.79) in dorsal view (pygidium absent).

FIGURE 1. A in A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland

FIGURE 1. A: Map of Poland with the location of the Holy Cross Mountains region (grey rectangle). B: Generalised geologic map of the Holy Cross Mountains region and the location of Kowala Quarry (black arrow). C: Map of Kowala Quarry with the location of the studied section exposed in the western part of the northern quarry wall indicated by the black arrow.

FIGURE 4 in A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland

FIGURE 4. Almost complete internal mould of a holaspid(?) cephalon of Trimerocephalus chopini n. sp. from Early Famennian marly shales at Kowala Quarry, Holy Cross Mountains, central Poland. A–C: Dorsal, anterior and lateral views, respectively. D: Oblique ventral view showing vincular furrow. E: Details of weakly crenulated genal part of vincular furrow, with white arrows indicating shallow pits.

FIGURE 6 in A new Trimerocephalus species (Trilobita, Phacopidae) from the Late Devonian (Early Famennian) of Poland

FIGURE 6. Bivariate plot of cephalic length (mm) versus width (mm) in meraspid degrees M9 and M10 of Trimerocephalus chopini n. sp. Presented data include only complete, undeformed specimens from the queues (see Radwański et al., 2009).