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Sporolithon lvovicum
Taxonomy
Sporolithon lvovicum was named by Maslov (1956). It is not extant.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Sporolithon lvovicum Maslov |
| 2016 | Sporolithon lvovicum Hrabovsky et al. p. 502 |
| 2017 | Sporolithon lvovicum Kishore et al. p. 213 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Sporolithon lvovicum Maslov 1956
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Hrabovsky et al. 2016 | Growth form encrusting to warty protuberant,
thallus 218371 mm thick, protuberances L 0.92 mm£ D 1.41.9 mm (Fig. 4A). Thallus monomerous with dorsiventral organization (Fig. 4B). VC non coaxial, plumose, up to 10 cells thick (Fig. 4B). Cells rectangular, L 2134 mm £ D 916 mm (n D 25). PF zonation present (Fig. 4C). Zones consist of 36 long rectangular cells and 26 short rectangular to squarish cells. Cells L 1417 (24) mm £ D 914 mm (n D 20). Cell fusions present in VC and PF (Fig. 4B). Empty 615 calcified tetrasporangial compartments grouped in sori within the protuberances (Fig. 4A, D). Chambers H 91120 mm £ D 4558 mm (n D 13), separated by 56-celled paraphyses that are as long as or longer and narrower than normal PF cells. Long cells of the paraphyses measure L 1620 mm £ D 68 mm (n D 8; Fig. 4E). No distinct layer of elongated cells below tetrasporangial compartments. Sori probably raised over the surrounding thallus surface at the time of maturity and later buried by new, subsequent thallus growth (Fig. 4A, D). Two carposporangial conceptacles observed. Carposporangial uniporate conceptacles are flask shaped, H 272294 mm £ D 368419 mm, protrude markedly above the thallus surface in encrusting as well as in protuberant thalli (Fig. 4F). Roof 96107 mm thick, 812-celled (Fig. 4F). Pore canal L 126 mm £ D 83 mm. Gametangial uniporate conceptacle H 130 mm £ D 510 mm (only one observed) protrudes on the thallus surface, apparently on the same thallus as the carposporangial plant. Roof type 1, consisting of 11 cells (Fig. 4GH). We consider it a male conceptacle. |
Measurements
No measurements are available
No ecological data are available
Age range: base of the Langhian to the top of the Late/Upper Pleistocene or 15.97000 to 0.01170 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Langhian | Czech Republic (South Moravian) | Sporolithon lvovicum (221520 221521) | |
| Badenian | Ukraine | Sporolithon lvovicum (164969) | |
| Late/Upper Pleistocene | India | Sporolithon lvovicum (165868) |