Plate I. Prasinophycean phycomata from the Early Devonian Rhynie chert.
1. Six phycomata loosely clustered in the chert matrix; slide BSPG 1964 XX 208; bar scale=50 μm.
2. Phycoma in degrading land plant tissue; slide BSPG 1964 XX 204; bar scale=30 μm.
3–6. Four optical sections through one of the specimens; arrow in Pl. I, 3 indicates circular structure (?opening); slide BSPG 1964 XX 206; bar
scales=20 μm.
7. A small phycoma; slide BSPG 1964 XX 203; bar scale=20 μm.
8. A large phycoma; slide BSPG 1964 XX 208; bar scale=20 μm.
9–10. Phycomata showing what appears to be a circular opening or orifice [arrows] in one of the lacunae floors; slides BSPG 1964 XX 206 (Pl.I, 9) and BSPG 1964 XX 204 (Pl. I, 10); bar scales=20 μm.
11–19. Phycomata from the chert matrix; slides BSPG 1964 XX 203 (Pl. I, 11–15,17,19) and BSPG 1964 XX 204 (Pl. I, 16,18); bar scales=20 μm.
Plate I. Prasinophycean phycomata from the Early Devonian Rhynie chert.1. Six phycomata loosely clustered in the chert matrix; slide BSPG 1964 XX 208; bar scale=50 μm.2. Phycoma in degrading land plant tissue; slide BSPG 1964 XX 204; bar scale=30 μm.3–6. Four optical sections through one of the specimens; arrow in Pl. I, 3 indicates circular structure (?opening); slide BSPG 1964 XX 206; barscales=20 μm.7. A small phycoma; slide BSPG 1964 XX 203; bar scale=20 μm.8. A large phycoma; slide BSPG 1964 XX 208; bar scale=20 μm.9–10. Phycomata showing what appears to be a circular opening or orifice [arrows] in one of the lacunae floors; slides BSPG 1964 XX 206 (Pl.I, 9) and BSPG 1964 XX 204 (Pl. I, 10); bar scales=20 μm.11–19. Phycomata from the chert matrix; slides BSPG 1964 XX 203 (Pl. I, 11–15,17,19) and BSPG 1964 XX 204 (Pl. I, 16,18); bar scales=20 μm.
การแปล กรุณารอสักครู่..
