浙南地区蓝藻两新种

TWO NEW SPECIES OF CYANOPHYTA FROM SOUTHERN ZHEJIANG

本文报道了浙南地区两个淡水蓝藻新种,它们分别命名为溪生翅线藻Petalonema fluminalis sp.nov.,尖形颤藻Oscillatoria rhaphis sp.nov. 1.溪生翅线藻新种Petalonema fluminalis Zhao sp.novv.(图1)。植物体常与胶须藻属Rivularia藻类混生,暗紫色,丝体不规则弯曲,宽40-80μm,长3-9mm;丝体和个体细胞胶质鞘明显,很厚,无同心收缢,黄或黄褐色,丝体鞘11-29μm,分两层,外层明显呈漏斗状,内层分层,平行于藻丝,个体细胞鞘4-11μm。

1. Petalonema fluminalis Zhao sp. nov. (Fig. 1) Thallus inter Rivularia sparsis, atropurpureo, filamentis irregulariter curvatis, 40—80μm latis, 3—9 mm longis; vaginis crassis, luteus vel fuscescenti, vaginae filamentosae crassitudine usque ad 11—29μm, epilamella infundibuliformis, interlamella lamellose, vaginae singulae cellulosae crassitudine usque ad 4—11μm non lamellosa, trichomatibus partim contortis; cellulis orculiformis, 6—14μm latis, 4—7μm longis; heterocystis major quam cellulis vegetativis napiformis, depresse globosis 14—23μm latis, 5—10μm longis. Zhejiang: wuyanling, in fluminibus alt. 1525 m. 1Ⅳ1985. Zhao Xiongfei. Typus: ZW 50421. 2. Oscillatoria rbaphis Zhao sp. nov. (Fig. 2) Filamentis inter Diatoms sparsis, castaneo, trichomatibus apicem versus gradatim attenuatis, 200—400μm longis, cellulis cylindricis, 3.5—4.0 ^xm latis, 4.5—6μm longis, ad genicula leviter constrictis, apicalibus 2—2.5μm latis, cellulis in medio truchomatis doliiformibus, 3—3-5μm latis, 2—3μm longis, cellula apicali obtusa, basin verrucosis in trichomatis apicali attenuatis, contentu aerugeneo, granuloso et vacuolis gassosis instructis. Zhejiang: wuyanling in rivulis, alt. 680m. 1Ⅳ1985 Zhao Xiongfei, Typus: ZW850432.