Table 2. Locality information, phenotypes, and sample sizes of hog-nosed snakes (Heterodon).
| Species locality | TTX resistance (50% MAMU) | n TTX bioassay | n SCN4A sequence |
|---|---|---|---|
| H. platirhinos | |||
| Saratoga Springs, Saratoga County, NY | >250 | 5 | 1a |
| Greenfield Center, Saratoga County, NY | >250 | 8 | 3 |
| Albany, Albany County, NY | 100–>250 | 6 | — |
| Town of Oyster Bay, Nassau County, NY | 75–>250 | 5 | — |
| Sterling Forest, Orange County, NY | >100 | 1 | — |
| Luzerne, Warren County, NY | >100 | 1 | — |
| Wilton, Saratoga County, NY | >100 | 1 | — |
| no specific locality, Frederick County, VA | >100 | 1 | 1 |
| Lake Whitney, Bosque County, TX | 5 | 1 | 1 |
| H. nasicus | |||
| no locality data (captive bred) | 5 | 1 | 1 |
Abbreviations: MAMU, mass-adjusted mouse unit; TTX, tetrodotoxin.
Locality information of Eastern Hog-nosed Snakes (H. platirhinos) and Plains Hog-nosed Snakes (H. nasicus) sampled for phenotypic (TTX resistance) and genotypic (SCN4A) variation, along with corresponding sample sizes (n).
a
Sample also used to obtain full transcript (cDNA) of SCN4A.