| a new species of spirorchis maccallum, 1918 (digenea: schistosomatoidea) and spirorchis cf. scripta from chicken turtle, deirochelys reticularia (emydidae), with an emendation and molecular phylogeny of spirorchis. | chicken turtles, deirochelys reticularia (latreille in sonnini et latreille) (testudines: emydidae) from alabama, usa were infected by spirorchis collinsi roberts et bullard sp. n. and spirorchis cf. scripta. the new species is most easily differentiated from its congeners by the combination of having caeca that extend far beyond the genitalia, intercaecal genitalia positioned in the middle portion of the body, a testicular column that nearly abuts the caecal bifurcation, a cirrus sac positioned ... | 2016 | 28003567 |
| morphological constraint on egg size: a challenge to optimal egg size theory? | some freshwater turtles appear unable to produce eggs large enough to achieve the balance between size and number of eggs predicted by optimal egg size theory. we present evidence that pelvic girdle structure constrains egg size and thus offspring size in females of smaller-bodied species (chrysemys picta and deirochelys reticularia). the constraint is demonstrated by the correspondence of slopes of the increase of the pelvic aperture and egg width with increasing body size. this constraint appe ... | 1987 | 3473499 |
| a new slider turtle (testudines: emydidae: deirochelyinae:trachemys) from the late hemphillian (late miocene/early pliocene) of eastern tennessee and the evolution of the deirochelyines. | trachemys(testudines: emydidae) represents one of the most well-known turtle genera today. the evolution oftrachemys, while being heavily documented with fossil representatives, is not well understood. numerous fossils from the late hemphillian gray fossil site (gfs) in northeastern tennessee help to elucidate its evolution. the fossiltrachemysat the gfs represent a new species. the new taxon,trachemys haugrudi, is described, and currently represents the most thoroughly described fossil emydid s ... | 2018 | 29456887 |