Taiyutyla Chamberlin, 1952

Shear, William A. & Crawford, Rodney L., 2019, Cave millipedes of the United States. XVI. Two new species from Oregon Caves National Monument, Oregon (Chordeumatida, Conotylidae and Caseyidae), Zootaxa 4674 (5), pp. 571-580 : 572

Genus Taiyutyla Chamberlin, 1952

Type species: Taiyutyla corvallis Chamberlin, 1952 .

The most recent revision is Shear (1974); Shear & Krejca (2011) adds one more species.

Taiyutyla is among the most diverse conotylid genera, with species ranging from the Sierra Nevada and Coast Ranges of California north to Vancouver Island, British Columbia, Canada. The taxon extends possibly as far north as southern Alaska, with isolated more northeasterly occurrences in Idaho and western Montana ( Shear 1971, 1974, Loomis & Schmitt 1971, Shear & Krejca 2011, Shear, Richart & Wong in prep.). Species of the genus have previously been described from caves, but with only minimal or no troglomorphic characters. The new species described below is no exception, known only from a cave, but with well-developed, pigmented eyes and only somewhat reduced body pigmentation. This slight degree of troglomorphism suggests this species may not be limited to caves, or that the population is in the early stages of troglomorphic adaptation.

Taiyutyla differs from the broadly sympatric conotylid genus Bollmanella Chamberlin 1941 in lacking a sinuously curved posterior pseudoflagellar branch on the gonopod.