Table 2.
Summary of studies on plethodontids treated with thyroid hormone (TH). T3 = triiodothyronine; T4 = thyroxine.
| Taxon | TH | Dosage (nM) | Duration (d) | Metamorphic response? | Reference |
|---|---|---|---|---|---|
| Larvae | |||||
| Desmognathus quadramaculatus | T4 | 1.2–4.8 | 62 | No | Hickerson et al. 2005 |
| Eurycea bislineata | T4 | 50 | 1–2 | Yes | Alberch et al. 1985 |
| Eurycea bislineata | T4 | 0.05 | 84–168 | No | Rose 1995a |
| Eurycea bislineata | T4 | 0.5 | 42 | Partial | Rose 1995a |
| Eurycea bislineata | T4 | 5–50 | 21 | Yes | Rose 1995a |
| Eurycea tynerensis | T3 | 25 | 21 | Yes | Aran et al. 2014 |
| Paedomorphs | |||||
| Eurycea neotenes | T4 | 1200–2400 | 19 | Yes | Kezer 1952 |
| Eurycea rathbuni | T4 | 1200–12,000 | 53 | Yes | Dundee 1957 |
| Eurycea tynerensis | T3 | 25 | 21 | No | Aran et al. 2014 |
| Eurycea tynerensi | T4 | 2400 | 17 | Yes | Kezer 1952 |
| Eurycea wallacei | T4 | 600–12,000 | 15–25 | Yes | Dundee 1962 |
| Gyrinophilus palleucu | T4 | 2400 | 120–470 | Yes | Dent and Kirby-Smith 1963 |
| Direct developers | |||||
| Plethodon cinereus | T4 | 6000–12,000 | 6 | Yes | Dent 1942 |