Accepted name
Plants of the World Online accepts Thelocactus tulensis as a distinct species. Its synonymy includes Thelocactus santaclarensis and T. matudae. These names allow material described in older literature to be located. [2-WWW]
A narrow niche in the species comparison
For T. tulensis, isothermality had a permutation importance of 54.4%, and precipitation in the wettest quarter 22.6%. Estimated niche breadth was 0.020, the lowest among the nine species examined. The value describes the distribution of suitable conditions in this model. Isothermality is the ratio of mean daily temperature range to annual range, multiplied by 100. [Mosco 2019, p. 6, Tables 1–2]
The model was built from 117 occurrence records and ten climatic and topographic variables. Niche breadth, estimated using the dimensionless Levins index, was 0.020. Variable importance was calculated by permuting data in the Maxent model. The results concern the regional profile of the sites. The analysis did not experimentally examine stem temperature tolerance or responses to watering. [Mosco 2019, p. 3–6, 10–12]
Related articles
Synonyms and names in the literature
Echinocactus tulensis · Thelocactus buekii subsp. jarmilae · Thelocactus buekii subsp. matudae · Thelocactus krainzianus · Thelocactus leucacanthus f. krainzianus · Thelocactus matudae · Thelocactus nidulans subsp. matudae · Thelocactus santaclarensis · Thelocactus tulensis subsp. huizachensis · Thelocactus tulensis subsp. kupcaki · Thelocactus tulensis subsp. matudae · Thelocactus tulensis subsp. vaskoanus · Thelocactus tulensis var. matudae · Thelocactus vaskoanus [2-WWW]