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Published In: Bryologia Universa 2: 204. 1827. (Bryol. Univ.) Name publication detail
 

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Notes     (Last Modified On 3/27/2009)
general taxon notes:
There are about 16 species of Regmatodon in the world. Most species are distributed around the tropical zones in a disconnected manner. Some bryologists placed the genus in a monotypic family, Regmatodontaceae, based on some unique features such as the peristome inserted below the capsule mouth and exostome teeth apparently shorter than endostome segments. Eight taxa of Regmatodon were recorded in the Chinese flora in the literature (Redfearn et al. 1996). Herzog (1925) first reported R. orthostegius Mont. from Yunnan province. Brotherus (1929) described two new taxa, R. declinatus var. minor Broth. from Guizhou and R. handelii Broth. (= R. orthstegius Mont.) from Yunnan as well as reporting R. polycarpus (Griff.) Mitt. (= R. orthostegius) from these two provinces. Bartram (1935) reported R. declinatus (Hook.) Brid. from Guangxi. P.-C. Chen et al. (1978) listed 4 species from China, with R. schwabei Herz. (= R. declinatus) reported new to the country. C. Gao (1981) published a new species, R. longinervis, from northeastern China and later C. Gao (1985) treated four species from Xizang with R. serrulatus (Dozy & Molk.) Bosch. & Sande Lac. newly reported to China. Four species of Regmatodon are recognized in this study.
 

 

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9. Regmatodon Brid. 异齿藓属 yi-chi xian shu
Bryol. Univ. 2: 294. 1827.
 
Plants rigid when dry, dull or slightly shiny, green to yellowish green, in sparse to dense mats. Stems creeping, irregularly or pinnately branched; branches short, sometimes flagelliform, obtuse at tips; paraphyllia rare or lacking. Stem leaves small, mucronate; branch leaves imbricate when dry, erect-spreading when wet, oblong-ovate or ovate-lanceolate, slightly concave, recurved at apex; margins entire or sparsely dentate above; costa single, reaching middle part of leaf or slightly above; leaf cells thick-walled, rhomboidal; alar cells undifferentiated; several rows of basal cells near margins smaller, subquadrate. Monoicous. Inner perichaetial leaves erect, elongate, acuminate. Setae elongate, reddish brown, smooth or coarsely papillose; capsules erect to slightly pendent, ovoid to cylindrical; peristome double; exostome obviously shorter than endostome, the teeth shortly lanceolate, slightly blunt at tips, yellowish, smooth, transversely striate; endostome segments yellowish, smooth or papillose, 2–3 times longer than the teeth, acuminate, keeled, perforate at middle; basal membrane low; opercula conic, with obtuse tips. Spores spherical, coarsely papillose.
 
 

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1. Setae papillose..................................................................................................2
1. Setae smooth or nearly so......................................................................................3
2. Branch leaves oblong-ovate; margins entire; costa up to the middle of leaf or so................ 1. R. declinatus
2. Branch leaves ovate-lanceolate; margins dentate; costa up to the upper leaf........................ 4. R. serrulatus
3. Branch leaves ovate, acuminate above; leaf margin entire; costa up to the middle of leaf... 3. R. orthostegius
3. Branch leaves triangular; leaf margin with 1-celled sharp teeth; costa up to the apex of leaf .......2. R. longinervis
 
 
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