Lithoporella sp. 1
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publication ID |
https://doi.org/ 10.4202/app.00579.2018 |
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persistent identifier |
https://treatment.plazi.org/id/03B7C03D-FF9A-FFC3-FFA2-F905FA8FFDFD |
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treatment provided by |
Felipe |
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scientific name |
Lithoporella sp. 1 |
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Fig. 7A, B View Fig , Table 8.
Material.—Bi/tetrasporic plants from Schaleková’s collection ( Schaleková 1973), NHM B1849 and NHM B1851/2 thin sections 5233 and 5111, respectively), early Serravallian, Rohožník, Slovakia (Vienna Basin). Bi/tetrasporic plants from newly collected samples ( Fig. 7A View Fig ), NHM
B1855 (thin section 371111453), early Serravallian, Vývrat, Slovakia (Vienna Basin). Spermatangial gametophyte ( Fig. 7B View Fig ), NHM B1856 (thin section 31011152), late Langhian, Stupava, Slovakia (Vienna Basin).
Description.— Lithoporella sp. 1 was found as overgrow of other coralline algae, geniculate mostly. It creates 63–214 μm thick thallus of encrusting growth form. Description is based on newly collected samples. Applanate branches were not observed. Surface is undulate with protruding conceptacles. Thallus is pseudoparenchymatous with dorsiventral interanal organisation and dimerous construction. Bistratose thallus is presented but with multicelled postigenous filaments predomination ( Fig. 7A View Fig 1 View Fig ). Primigenous filaments consist of palisade cells 9–65 μm H (mean ± SD: 30 ± 16.3 μm) and 7–19 μm L (mean ± SD: 12 ± 2.9 μm) (n = 13). Some cells are flattened to square but palisade predominate. H/L ratio is 0.5–6.2 ( Fig. 7A View Fig 2). Postigenous filaments consist of up to 10 cells. Cells are 11–29 μm L (mean ± SD: 18 ± 5.5 μm) and 9–18 μm D (mean ± SD: 13 ± 2.5 μm) (n = 8). Epithallial cells were not observed on this specimen, but in other are flattened to rounded. Trichocytes were not observed.
Spermatangial conceptacle is more or less triangular, or elliptical, projecting 19 μm above thallus surface ( Fig. 7B View Fig 1 View Fig ). Chamber is 36 μm D and 26 μm H. Pore canal is cylindrical 27 μm L and 11 μm W. The roof consists of 3–4 celled filaments ( Fig. 7B View Fig 2).
Bi/tetrasporangial conceptacle chamber is 139 μm D and 70 μm H ( Fig. 7A View Fig 1 View Fig ). Pore canal is cylindrical 44 μm L and 27 μm W. Pore canal cells are the same as the roof cells. Pore canal filaments are 2 celled ( Fig. 7A View Fig 1 View Fig ).
Remarks.—Species occurs in new samples as in Schaleková’s (1973) material from Rohožník. However, it was not described prior to this work by her. Therefore, specimens are considered as unpublished. Species is characteristic in having large palisade cells in primigenous filaments with H/L ratio 2–6, bi/tetrasporic conceptacles development and lateral fusion of cells in adjacent filaments, as well as multicellular thallus. Characters fit to the diagnosis of the genus Lithoporella (Guiry in Guiry and Guiry 2018). Basic characters of known specimens are listed in Table 8.
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