| Colony morphology | Densely gelatinous filaments, light green to deep green | Diffuse, light colored, spreading colony, dull grayish blue-green |
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| Filament morphology | Flexuous, bent, slightly coiled | Tapering |
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| Filament structure | Solitary, polar, non-tapering | Heteropolar, tapering, strongly constricted at crosswalls |
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| Branching | Branched | Branched |
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| Sheath | Present on some filaments, colorless | Thin, barely visible, colorless |
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| Cross-walls | Present | Present |
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| Vegetative cell shape | Cylindrical to barrel shaped | Isometric, longer than wide near trichome apex |
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| Vegetative cell dimensions (µm) | 5.4×4.2-10.1 | 3.8-4 × 2.5-5.5 |
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| Vegetative cell granulation | Mostly granular | Homogenous to sparsely granular |
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| Heterocyte shape | Ellipsoidal to cylindrical | Solitary, basal, hemispherical |
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| Heterocyte dimensions (µm) | 4-4.5× 5.1 | 2.5-4.4 ×3.6-4.4 |
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| Akinete morphology | Spherical, very rare, solitary, in the middle of filaments or free from filaments | Forming in series in basal portion of trichome, homogenous to coarsely granular |
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| Akinete dimensions (µm) | 5.1-7.6×6.5-7.1 | 3.3-7.5 |
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| Akinete granulation | Homogenous to coarsely granular | Homogenous to coarsely granular |
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| Hormogonia | Present | Not present |
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| Necridia | Occasionally found | Not present |
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| Habitat | Lithophytic on stones in freshwater pond, northern Iran | Lithophytic on cave wall, Kauai, Hawaii |
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