Tylotaceae Kraft & G.W.Saunders, 2025
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publication ID |
https://doi.org/10.1071/SB24030 |
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persistent identifier |
https://treatment.plazi.org/id/03CA87D8-3E58-FFCE-FCE5-F96AFE0BFB99 |
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treatment provided by |
Felipe |
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scientific name |
Tylotaceae Kraft & G.W.Saunders |
| status |
fam. nov. |
Tylotaceae Kraft & G.W.Saunders , fam. nov.
Type: Tylotus J.Agardh
Family consisting of the genera Tylotus , Pinnatiphycus and Reptataxis .
Thalli multiaxial, attached basally or also along the fronds by stout terete haptera. Fronds flattened to compressed, centrally either completely pseudoparenchymatous ( Tylotus ) or with a narrow filamentous medulla surrounded by a pseudoparenchymatous cortex. Tetrasporangia zonate, in nemathecia. Gametophytes monoecious, spermatangia in ampullar pits containing a single mother cell ringed distally by one- or two-celled spermatangia. Carpogonial branches three-celled, auxiliary cells clearly procarpic in Tylotus , not yet determined in the other genera. Gonimoblasts multiple and radial in Reptataxis and Pinnatiphycus , becoming basally placentate; gonimoblasts in Tylotus initially horizontal from a large fusion cell, extending across and fusing with cells of a basal layer of gametophyte cells. Cystocarps ostiolate, carposporophytes domed and with much-invaginated surfaces, the carposporangia terminal on elongate subtending cells; carposporophytes of Pinnatiphycus and Reptataxis centrally composed of mixed or fused gonimoblast and vegetative cells or filaments, the carposporangia forming fanned chains of 2–3 in Pinnatiphycus and catenate parallel chains of 4–6 in Reptataxis .
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