Microkamienskia perpusilla (Błaszk. & Kovács) Corazon-Guivin, G. A. Silva & Oehl

Microkamienskia perpusilla (Błaszk. & Kovács) Corazon-Guivin, G. A. Silva & Oehl

Fig. 4 C, D View Figure 4

Basionym.

Glomus perpusillum Błaszk. & Kovács.

Synonym.

Kamienskia perpusilla (Błaszk. & Kovács) Błaszk., Chwat & Kovács.

Specimens examined.

Poland. Pomeranian Province, spores from single-species cultures established from spores extracted from a trap pot culture inoculated with rhizosphere soil and root fragments of Ammophila arenaria from the Hel Peninsula maritime dunes (54 ° 47 ' 35 " N, 18 ° 24 ' 69 " E), 7 Aug 2021, P. Niezgoda (slides with spores nos. 3991–3996, LPPDSE).

Diagnosis.

Differs from Mk. peruviana , the phylogenetic sister (Fig. 1 View Figure 1 ), in (i) morphometric features of the spore wall, the spore subtending hypha, and the pore connecting the subtending hyphal lumen with the spore interior, (ii) phenotypic properties of spore wall layer 1 and subtending hyphal wall layer 1, and (iii) nucleotide composition of sequences of the 45 S nuc rDNA region ( Błaszkowski et al. 2009 a; Corazon-Guivin et al. 2019 b; see “ Discussion ” for details).

Notes.

The morphological features of Isolate 524 (Fig. 4 C, D View Figure 4 ), here recognized to be conspecific with Mk. perpusilla , were nearly identical to those originally defined for G. perpusillum ( Błaszkowski et al. 2009 a) . The only discrepancy was the lack of plasticity and contractibility of spore wall layer 2 in Isolate 524, which were considered unique features of G. perpusillum .