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Fig. 1 | BMC Evolutionary Biology

Fig. 1

From: Homeosis in a scorpion supports a telopodal origin of pectines and components of the book lungs

Fig. 1

Comparison of wild type individual (a, b, e, e’) and inferred homeotic scorpion (c, d, f, f’), both immature males of Scorpiops luridus from the same locality. (a, b) Dorsal and ventral views of wild type male showing mesosoma (ms), metasoma (mt, the posterior opisthosoma), opisthosoma (op) and prosoma (pr). (c, d) Dorsal and ventral views of the homeotic male. The dorsal aspects of the two specimens are similar, but the ventral mesosomae differ. (e) Ventral view of normal male, showing genital operculum (go), genital papillae (gp), O5 & O7 (opisthosoma 5 and opisthosoma 7), pectinal lamellae (pe), pectinal teeth (pt), sternite 7 (S7), and stigmata (st). (e’) Same as e but unlabeled. (f, f’) Unlabeled (f) and labeled (f’) ventral views of the homeotic male showing the everted structure (sp, sternal protrusion) and its partially developed bud (sb), genital operculum leg (gl) and its partially developed bud (gb), pectinal leg (pl), sternal depression (sd), and sternal notch (sn). Scale bars: a–d, 10 mm

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