FIGURE 1. Stratigraphic range of the species herein considered within Laeviprosopon with schematic drawings of all the species.
FIGURE 2. Studied areas: 1 - five Oxfordian localities in southern Polish Uplands (Poland); 2 - late Kimmeridgian locality of Oberböhringen (Germany); 3 - Tithonian locality of Ernstbrunn (Austria); 4 - Tithonian - early Berriasian locality of Štramberk (Czech Republic).
FIGURE 3. Carapace with morphological structures in Laeviprosopon using the type species, L. laeve.
FIGURE 4. Laeviprosopon laeve A - anterior left part of the carapace with granules visible (I-F/MP/3663/1533/08, Bzów); B - rostrum, bases of the spines marked with black arrows (NHMW 2007z0149/0022, Ernstbrunn); C - rostrum, bases of the spines marked with black arrows (SMNS 70527/8, Oberböhringen); D - suborbital spine (IGPUW C/1/128, Rudniki), E - carapace (I-F/MP/3914/1533/08, Bzów); F - mesogastric region with symmetric tubercles visible (I-F/MP/6275/1599/12, Niegowonice); G - left lateral view (I-F/MP/3914/1533/08); H - suborbital spine marked with black arrow (SMNS 70527/5, Oberböhringen). mt - mesogastric tubercles, mgt -mesogastric groove tubercles. Scale bars equal 1.0 mm.
FIGURE 5. Laeviprosopon laeve, specimens interpreted as molts with molting lines similar to linea homolica A - SMNS 70527/3 (Oberböhringen); B - SMNS 70527/4 (Oberböhringen); C - I-F/MP/6275/1599/12 (Niegowonice); D - SMNS 70527/1 (Oberböhringen); E - SMNS 70527/2; F - right lateral view, NHMW 1990/0041/4915 (Ernstbrunn); G - left lateral view, SMNS 70527/6 (Oberböhringen); H - left lateral view, SMNS 70527/11 (Oberböhringen) lateral sides of the carapace with no signs of the molting lines. Scale bars equal 5.0 mm.
FIGURE 6. Laeviprosopon fraasi A - NHMW 1990/0041/3295, Ernstbrunn; B - NHMW 1990/0041/4051, Ernstbrunn; C - holotype, BSP AS III 309, Štramberk; D - NHMW 1990/0041/3295; E - NHM W1990/0041/4051; F - holotype, BSP AS III 309. Orbital margin marked with an arrow. lh - linea homolica. Scale bars equal 1.0 mm.
FIGURE 7. Laeviprosopon ewakrzeminskae n. sp. A - carapace (NHMW 1990/0041/5179, paratype, Ernstbrunn); B - carapace, rostrum marked by an arrow (NHMW 2014/0194/0978, paratype, Ernstbrunn); C - carapace, spines on the epibranchial region marked by an arrow (NHMW 1990/0041/2744a, holotype, Ernstbrunn); D - lateral right view (NHMW 1990/0041/2744a); E - lateral right view (NHMW 1990/0041/2744a). ht - hepatic tubercle. Scale bars equal 1.0 mm.
FIGURE 8. Laeviprosopon lanceatum n. sp. A, B - left lateral view (A) I-F/MP/342/1497/08, paratype, Niegowonice; (B) I-F/MP/736/1502/08, holotype, Ogrodzieniec); C - carapace with the orbital margin visible (I-F/MP/736/1502/08); D - carapace (I-F/MP/736/1502/08); E - carapace with the orbital margin visible (I-F/MP/342/1497/08); F - carapace (I-F/MP/736/1502/08); G - oblique view (I-F/MP/736/1502/08). Scale bars equal 1.0 mm.
FIGURE 9. Laeviprosopon joecollinsi n. sp. A - carapace (paratype, UF272115, Szklary); B - carapace (I-F/MP/30381532/08, Niegowonice) gp - gastric pits; C - lateral left view (paratype, UF272115) groove parallel to the branchio-cardiac groove; D - carapace (I-F/MP/741/1502/08, paratype, Ogrodzieniec) groove parallel to the branchio-cardiac groove; E - carapace (I-F/MP/6264/1599/12, holotype, Niegowonice); F - anterior view (paratype, UF272115); G - lateral right view (I-F/MP/741/1502/08); H - carapace (paratype, UF272119, Szklary). Scale bars equal 1.0 mm.
FIGURE 10. A - Laeviprosopon punctatum, carapace (holotype, BSP AS III 307); B - Laeviprosopon punctatum, oblique lateral view (holotype, BSP AS III 307); C - Laeviprosopon laculatum (holotype, NHMW 1990/0041/4221). Scale bars equal 1.0 mm.
FIGURE 11. A - probable molting line (dashed line) of Jurassic Homolodromioidea exemplified by Tanidromites montreuilensis; B - molting lines of the Jurassic homoloid Laeviprosopon laeve; C - molting lines in Cretaceous Homoloidea exemplified by Homolopsis edwardsii (Bell, 1863).
FIGURE 12. A - Doerflesia ornata Feldmann and Schweitzer, 2009, carapace (NHMW 2007z0149/0015); B - Tenuihomola ortwini Feldmann and Schweitzer, 2009, lateral view (NHMW 2007z0149/0017); C - Tenuihomola ortwini, carapace (NHMW 2007z0149/0017). Scale bars equal 1.0 mm.
