The millipede family Conotylidae in northwestern North America, with a complete bibliography of the family (Diplopoda, Chordeumatida, Heterochordeumatidea, Conotyloidea) Author Shear, William A. Author Richart, Casey H. Author Wong, Victoria L. text Zootaxa 2020 2020-03-19 4753 1 1 78 journal article 21316 10.11646/zootaxa.4753.1.1 f7974bcf-11e7-4d1b-b09d-530dc2dbd54f 1175-5326 3983782 AA9F66B3-EF8C-4F6B-8F35-0BCBEE5122ED Taiyutyla napa Shear, 1971 Fig. 22 Taiyutyla napa Shear 1971: 87 . Type locality: California , Napa Co. , Mt. St. Helena , male holotype and two female paratypes ( AMNH ) . New record : California , Napa Co. , Mt. St. Helena , estimated coordinates taken from the Mt. St. Helena Trail Head along SR-29, elev. 715 m . , 38.6523°N , - 122.5998°W , 13 March 1962 , J. S. Buckett , M. E. Irwin , m f ( EMEC ) . Notes : These specimens are topotypical. The scanning electron micrograph ( Fig. 22 ) shows many details not seen using optical microscopes and not reported in the original description ( Shear 1971 ). Figure 22 illustrates, in posterior view, the anterior ( ag ) and posterior ( pg ) gonopods. The ventral part of the T-shaped branch ( T ) of the posterior gonopod coxite is evidently absent, so the coxite somewhat resembles those of species of Bifurcatella , n. gen. , but the anterior gonopod does not. For the time being, this species is better accommodated in Taiyutyla . Note the secretion ( sec ) emerging from a pore in the anterior gonopod.