Table 1.
Synonymies of SGSC according to previous reviews and geographical distributions reported.
Fig 1.
Distribution of the Stenocereus griseus species complex (SGSC) taxa, as considered by Arreola-Nava [15].
Fig 2.
Kriging interpolation of individual Q-matrix by each clustering method.
The first three maps columns (left to right) depict the interpolated assignment probability for each method (labeled in the heading) and K is the number of groups detected by each. Groups containing the same populations across methods (EGGs) are placed alongside and keep the same color hue, whereas the color gradient saturation represents higher probability: red = S. griseus-Mexico (here designated S. huastecorum); green = S. pruinosus and its subgroups (green shades in Geneland maps); blue = S. laevigatus and its subgroups (blue shades in Geneland maps), and dark gray = S. griseus. White bullets represent populations. EGGs populations are represented at the rightmost column by bullets which follow the color code before described.
Fig 3.
Color gradients represent BC belonging probability starting from the 75% threshold value, purple bars with green types bootstrap values are the three genetic barriers detected by Barrier, at the left the UPGMA dendrogram following the color code used in the BC.
Fig 4.
Structural characters measured.
CLSL: central-left spine length, CRS: central-right spine, LCS: lower central spine, UCS: upper central spine, RCSL: radial c-homologous spine length, lower-case letters: radial spines (pairs represented by the same letter).
Table 2.
Pairwise comparisons of Ecological niche principal components and two-ways background tests.
Fig 5.
Niche suitability pairwise comparisons based on t-tests.
Different letters represent levels of significant differences.
Fig 6.
Areolar morphometrics t-tests.
(A-D) areolar features lengths comparisons, (E-F) spines counts comparisons. Levels not connected by the same letter are significantly different.
Fig 7.
Vegetative features of S. huastecorum.
(A) general aspect of S. huastecorum (H. Alvarado-Sizzo 350), (B) rib details (H. Alvarado-Sizzo 352), (C) typical young (upper) and mature (lower) areolas (H. Alvarado-Sizzo 245), (D) apex of a young branch. Credits: (A) I. Torres-García, (B-D) H. Alvarado-Sizzo.
Fig 8.
A newly opened S. huastecorum flower.
Lateral (A) and top (B) view, (C) longitudinal cut of the floral tube. (H. Alvarado-Sizzo 350). Credits: H. Alvarado-Sizzo. Scale bars = 1 cm.
Fig 9.
Falling areolas (A, upper) and longitudinal cut (A, lower), aspect of a reproductive branch with immature fruits (B), and focus stacking micrograph (4X) of a seed hilum-micropylar region (C) and lateral view(D). Credits: (A, B) H. Alvarado-Sizzo (C) A. González-Murillo & H. Alvarado-Sizzo. Scale bars (A) = 1 cm; (C, D) = 1 mm.