urostyle


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Related to urostyle: keel bone

urostyle

a slender, pointed bone at the base of the backbone in amphibians, which is formed from fused vertebrae.
References in periodicals archive ?
Upward flexion of the urostyle developed at 11.45 +- 0.42 mm (25 DPH, Fig.
Skeletal Ontogeny and Anomalies in Larval and Juvenile Crimson Snapper, Lutjanus erythropterus Bloch, 1790
The caudal skeleton had 3 epurais, the urostyle, a small uroneural dorsal to the urostyle, 4 hypurals, and 2 autogenous haemal arches on the antepenultimate and penultimate vertebrae.
Early life history of the Argentine sea bass (Acanthistius patachonicus) (Pisces: Serranidae)
satan is included within the crown-group (Calyptocephalella + Gigantobatrachus) on the basis of the presence of very well-developed dorsal iliac crest, and short urostyle (Appendix 3).
Una nueva Calyptocephalellidae (Anura, Neobatrachia) del Cretacico Superior de la Patagonia, Argentina, con comentarios sobre su posicion sistematica
Pale brown dorsum from tip of the snout to urostyle, bearing large dark brown blotches on the posterior and medium part of back, becoming smaller on head (Fig.
Rediscovery of the types of Colostethus meridensis, with description of a related new species and redescription of Aromobates mayorgai (Amphibia: Anura: Dendrobatidae)/Redescubrimiento de los ejemplares tipo de Colostethus meridensis, con descripcion de una nueva especie emparentada y redescripcion de Aromobates mayorgai (Amphibia: Anura: Dendrobatidae)
Developmental stage refers to the upward (dorsal) flexion of the notochord tip (urostyle) concurrent with caudal fin base and principal ray formation (Moser, 1996): the preflexion stage occurs when the notochord is straight; the flexion stage occurs when the notochord is obviously flexed and caudal rays are forming; and the postflexion stage occurs when the notochord tip is aligned vertically with the caudal base plate (hypural) elements.
Spatial and temporal distribution of grouper larvae (Serranidae: Epinephelinae: Epinephelini) in the Gulf of Mexico and straits of Florida
Para-cloacal bands short and wide, extending from level of urostyle to mid-length of thighs.
A frog survivor (amphibia: anura: aromobatidae: Mannophryne) of the traditional coffee belt in the Venezuelan andes/Una rana (amphibia: anura: aromobatidae: Mannophryne) sobreviviente del cinturon tradicional del cafe en los andes de Venezuela
The following measurements were also included: internarial distance--distance between medial borders of nares; snout length--distance from tip of snout to anterior margin of eye; orbit-jaw distance--shortest distance between deepest region below eye and margin of upper jaw; naris-jaw distance--shortest distance between naris and margin of upper jaw; choana width--maximum width of choana; femur length--distance from tip of urostyle to distal end of femur; arm length--distance from proximal end of radio-ulna to proximal base of pollex; hand length--length from proximal base of pollex to tip of third finger; interfascicular distance--shortest distance between dentigerous fascicles; and tarsal length--distance from proximal border of inner metatarsal tubercle to proximal end of tibiale.
A new species of Osteocephalus (Anura: Hylidae) from Guyana
Leap distances were determined by touching upright frogs at the base of the urostyle, and measuring the length of the first leap made in response to the stimulus.
Antipredator behaviors of newly metamorphosed green frogs (Rana clamitans) and leopard frogs (R. pipiens) in encounters with eastern garter snakes (Thamnophis s. sirtalis)
In preservation, two dark, slash-like pigments spots were present on the posterior lateral body above and below the urostyle. In nearly all other aspects, juvenile finescale menhaden closely resembled adults by this size.
Descriptions of larval, prejuvenile, and juvenile finescale menhaden (Brevoortia gunteri) (family Clupeidae), and comparisons to gulf menhaden (B. patronus)
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