Capilliphycus guerandensis Lefler, D.E. Berthold & Laughinghouse, 2022

Berthold, David E., Lefler, Forrest W. & Laughinghouse, H. Dail, 2022, Recognizing novel cyanobacterial diversity in marine benthic mats, with the description of Sirenicapillariaceae fam. nov., two new genera, Sirenicapillaria gen. nov. and Tigrinifilum gen. nov., and seven new species, Phycologia 61 (2), pp. 146-165 : 150

Capilliphycus guerandensis Lefler, D.E. Berthold & Laughinghouse sp. nov.

Figs 45–48

DESCRIPTION: Thallus light to dark forest green, and yellow to orange when exposed to air (drying). Filaments straight to flexuous, 18.5– 29.2 µm in diameter, rarely coiled. Sheath thin, facultative, hyaline, not lamellate. Cells not constricted. Cells discoid, wider than long, 15.8– 24.9 µm wide, 1–2.2 µm long. Cell content green. Apices conical to rounded, attenuating, without calyptra. Apical cell yellow. Hormogonia formed by straight fragmentation, with or without necridic cells. Diagonal fragmentation occurs with or without necridic cells.

COMMENT: This species grows partially submerged.

TYPE LOCALITY: FRANCE. Loire-Atlantique: Guérande, Terre de Sel (47°18.938 ʹ N, 2°27 ʹ 11.850”W)

HABITAT: Hypersaline pools within inland salt flats.

ETYMOLOGY: The epithet guerandensis is a reference to the salt flats in Guérande where the species originates.

HOLOTYPE: US 227655 (dried material in a metabolically inactive state of reference strain BLCC-M76 ), deposited in US National Herbarium, National Museum of Natural History, Smithsonian Institution , Washington, DC, USA.

REFERENCE STRAIN: BLCC-M 76.

MATERIALS ANALYSED: BLCC-M 76, BLCC-M 92 ( US 227668).

Figures

Figs 39–48. Microscope images of Capilliphycus. Scale bars = 50 µm. Fig. 39. Yellow apical region of C. flaviceps (reference strain BLCC-M137). Fig. 40. Extended sheath at the apices in C. flaviceps (reference strain BLCC-M137). Fig. 41. Diagonal fragmentation in C. flaviceps (reference strain BLCC-M137). Fig. 42. False branching in C. flaviceps (reference strain BLCC-M137). Fig. 43. Filaments growing past another in C. flaviceps (reference strain BLCC-M137). Fig. 44. Spiral morphology of some filaments of C. flaviceps (reference strain BLCC-M137). Fig. 45. Yellow apical cells of C. guerandensis (reference strain BLCC-M76). Fig. 46. Facultative sheath in C. guerandensis (reference strain BLCC-M76). Fig. 47. Diagonal fragmentation in C. guerandensis (reference strain BLCC-M76). Fig. 48. Tapering of apices in C. guerandensis (reference strain BLCC-M76).