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Table 2 Comparison of characters of Lithothamnion muelleri and L. glaciale from Espiríto Santo state (Brazil) and with the same and related species from other areas

From: New records of rhodolith-forming species (Corallinales, Rhodophyta) from deep water in Espírito Santo State, Brazil

  Lithothamnion muelleri Lithothamnion corallioides Lithothamnion glaciale
Brazila Southern Australiab British Islesc Ria de Vigod Ría de Arousae British Islesf British Islesc Brazila
Branch diameter 1–3 mm 1–4 mm Mainly <1 mm ND <1.5–1.7 mm >1 mm Variable 2–4 mm
Core cells (l) × (d) μm (7–18) × (3–9) (2–30) × (2–15) Fusiform (5–35) × (5–10) ND Fusiform (5–10) × (5–10) ND (8.5–12) × (4–8) Elliptical (8–12) × (4–8) Elliptical (10–20) × (7–11)
Core fusions Localized ND Very extensive Very extensive Very extensive ND Localized Localized
Groups of fused cells Bead-like ND Star-like ND ND ND Bead-like Bead-like
Peripheral cells (l) × (d) μm (12–17) × (5–7) ND (10–30) × (5–12) ND ND (7.5–26) × (15–50) (7–26) × (3–8) (12–21) × (7–13)
Tetra/bisporangia conceptacle shape Slightly raised above Protruding above or flush Without rim, pore plate convex Protruding above ND Slightly raised With narrow, non-raised rim, pore plate level Buried, non-raised rim, pore plate level
Diam. of tetra/bisporangial conceptacle chamber (μm) 375–755 280–780 234–380 200–400 ND 150–360 150–360 300–430
Height of tetra/bisporangial conceptacle chamber 200–320 150–200 83–117 108 ND 110–180 110–180 160–280
Roof thickness (no. of cells/length) (μm) 7–9/66–80 5–9 ND/29–39 ND/27–31 ND ND/5–40 ND/5–40 3–4/25–35
No. of layers surrounding conceptacles below thallus surface 7–9 5–9 10g 9–11h ND ND 12–14i 13–14
Tetra/bisporangial shape Long Long Long and thin ND Long ND Elliptical Elliptical
  1. ND no data
  2. aPresent study
  3. bWoelkerling (1996)
  4. cChamberlain and Irvine (1994)
  5. dAdey and McKibbin (1970)
  6. ePeña and Bárbara (2004)
  7. fAdey and Adey (1973)
  8. gData taken from Chamberlain and Irvine (1994), figure 85A
  9. hData taken from Adey and McKibbin (1970), figure 5
  10. iData taken from Chamberlain and Irvine (1994), figure 87B