OTHER COMMON NAMES
English: Goose-neck turtle, leatherback turtle; French: Tortue luth, tortue-molle à épines; German: Lederschildkröte; Spanish: Tortuga-casco suave espinosa.
Trionyx spiniferus LeSueuer, 1827, New Harmony, Posey County, Indiana, on the Wabash River. Six subspecies are acknowledged.
This is a medium-sized softshell with spiny protuberances on the anterior rim of a colorless olive carapace. A sample of darkish circles, which is particularly distinct among the many males, fades within the grownup females. At least two pairs of callosities (hyo-hypoplastral and xiphiplastral) are current in adults.
Northern Mexico across many of the southern, central, and japanese United States to the Great Lakes area of southern Canada.
Slow-moving rivers, shallow streams, and huge ponds and lakes.
This species might stay buried on the backside of its aquatic habitat for many of the day; nonetheless, it sometimes basks on sandbars or steep riverbanks. The spiny softshell stays submerged for lengthy durations by absorbing oxygen via the pores and skin and lining of the throat whereas carbon dioxide diffuses across the pores and skin. In northern areas, this species hibernates beneath the ice for a number of months every winter.
FEEDING ECOLOGY AND DIET
These turtles are predominantly carnivorous, ingesting all accessible aquatic animals; nonetheless, plant materials together with acorns and leaves can also be consumed. In Iowa, crustaceans, fish, and bugs had been a very powerful food gadgets, however plant matter was present in 61% of all turtles sampled.
Mating happens within the early spring and eggs are usually laid in June and July. The brittle, spherical eggs are roughly 1.1 in (28 mm) in diameter. At least one clutch of 4 to 32 eggs is produced yearly. The eggs hatch in late summer season and hatchlings emerge within the autumn to hibernate underwater.
Not threatened. The widespread distribution and relative abundance of this species in its most well-liked habitats counsel that it's not presently in danger. Because these turtles are dependent upon excessive ranges of dissolved oxygen of their aquatic atmosphere, water air pollution will be the most important risk to softshell populations.
SIGNIFICANCE TO HUMANS
This species could also be consumed domestically; nonetheless, it's collected in giant numbers on the market in Asian food markets in giant North American cities and for export. Hatchlings are sometimes accessible within the pet commerce.