Nisada Gold-Morgan, González-Resendiz, León-Tejera et Montejano

Gold-Morgan, Michele, González-Resendiz, Laura, León-Tejera, Hilda & Montejano, Gustavo, 2015, Description of coccoid cyanoprokaryote Nisada stipitata morphogen. et sp. nov. from the supralittoral zone in the tropical Mexican Pacific, Phytotaxa 220 (3), pp. 268-276 : 269-270

publication ID	https://doi.org/ 10.11646/phytotaxa.220.3.5
DOI	https://doi.org/10.5281/zenodo.13634866
persistent identifier	https://treatment.plazi.org/id/03F88784-D347-F64E-8F9C-F8F2FA01FDD7
treatment provided by	Felipe
scientific name	Nisada Gold-Morgan, González-Resendiz, León-Tejera et Montejano
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Treatment

Nisada Gold-Morgan, González-Resendiz, León-Tejera et Montejano , morphogen. nov. ( Figs. 2–6 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 )

Biofilm composed of a continuous and homogeneously structured mucilaginous, one-layered colony, sometimes mixed with other cyanoprokaryotes ( Figs. 2A–G View FIGURE 2 ; 4A View FIGURE 4 ) made up of densely, parallelly arranged, polarized unicells to pseudofilaments ( Figs. 2D, H–M View FIGURE 2 ). Basal and non-basal cells of the pseudofilament with differentiated mucilaginous structures: basal pad, stipe and cup-like structure ( Figs. 2I–M View FIGURE 2 ; 4B, C View FIGURE 4 ) (except for the pad which is part only of the basal cell), therefore pseudofilament and each cell heteropolar. Pseudofilaments set individually and vertically in the also mucilaginous, black, thick, rigid, well-delimited colonial sheath visible in top and lateral views ( Figs. 2E, G, H View FIGURE 2 ). Basal/mother cell dividing symmetrically in a plane perpendicular to the longitudinal axis of the pseudofilament ( Figs. 3A, B, F View FIGURE 3 ); first daughter cells dividing symmetrically either in a plane perpendicular to the longitudinal axis (morph 1; Figs. 3B, F View FIGURE 3 ) or parallel to this axis (morph 2; Fig. 3D View FIGURE 3 ) in pseudofilaments of the same colony; second daughter cells (present only in morph 1) dividing symmetrically in a perpendicular plane ( Fig. 3B View FIGURE 3 ). All daughter cells reproductive and, when released (except the basal/mother cell), fix themselves in the colonial mucilage and begin a new cycle ( Figs. 3E, H View FIGURE 3 ). The basal/ mother cell remains and divides again, also initiating a new cycle. In morph 1, first daughter cells either double their size before dividing ( Figs. 2K, L View FIGURE 2 ) and are released, or triple it and are then released without dividing ( Fig. 2I View FIGURE 2 ). In morph 2, the two daughter cells resulting from longitudinal division of the first daughter cell are released after this division. Both morphs are present in the same colony but morph 1 is the most abundant. No morph distribution pattern is apparent within a colony.