Kapala stingaree
The Kapala stingaree is a species of stingray in the family Urolophidae, endemic to inshore waters off southeastern Queensland and New South Wales. It is commonly found on and around rocky reefs at a depth of. Reaching in length, the Kapala stingaree has a rounded, diamond-shaped pectoral fin disc and a slender tail, which ends in a leaf-shaped caudal fin and bears lateral skin folds and a small dorsal fin in front of the stinging spine. It has a distinctive bell-shaped curtain of skin between its nostrils. This species is greenish above, with a highly variable pattern of dark markings usually found outside and between the eyes, and over the back and tail.
Crustaceans, in particular shrimp and amphipods, constitute the predominant prey of the Kapala stingaree; small bony fishes and polychaete worms are also eaten. It is aplacental viviparous, with females normally gestating only one pup at a time, and provisioning it with histotroph. The International Union for Conservation of Nature has assessed this species as Near Threatened; it is regularly taken incidentally by commercial fisheries, and is unlikely to be resilient against fishing pressure due to its low fecundity and propensity for aborting its young when captured.
Taxonomy
Commonwealth Scientific and Industrial Research Organisation researchers Gordon Yearsley and Peter Last described the Kapala stingaree, previously termed Urolophus "sp. A", in a 2006 issue of the scientific journal Zootaxa. They named the new species in honor of the research ship FRV Kapala, which conducted a series of fishery surveys off New South Wales in 1980s and 1990s that contributed substantially to ichthyological knowledge. On November 14, 1984, the Kapala collected the type specimen of this species, an adult male long, from the Tasman Sea off Jervis Bay. This ray may also be referred to as the banded stingaree.Distribution and habitat
The range of the Kapala stingaree is limited to the eastern coast of Australia, between Cape Moreton in Queensland to Disaster Bay in New South Wales. This benthic, inshore species has been reported between the depths of. Off Queensland, it is common in water deeper than, while off New South Wales it is rare north of the Clarence River, [New South Wales|Clarence River], and common south of it in water shallower than. The Kapala stingaree prefers rocky reefs and adjacent sandy flats, as well as seagrass beds.Description
The pectoral fin disc of the Kapala stingaree is more or less diamond-shaped with rounded outer corners and posterior margins, and is slightly wider than long. The leading margins of the disc are nearly straight and converge at an obtuse angle on the fleshy, barely protruding snout. The eyes are of modest size and followed by teardrop-shaped spiracles with rounded posterior rims. There is a subtle knob on the rear margin of each nostril. Between the nostrils is a bell-shaped curtain of skin, with the posterior margin shallowly fringed and corners elongated into lobes; only the sparsely-spotted stingaree has a similarly shaped nasal curtain. The mouth is small and contains 5-7 papillae arranged in a W-shaped pattern on the floor. The lower jaw also bears a patch of prominent papillae, arranged to form a series of transverse ridges. The teeth have rhomboid bases and are arranged in a quincunx pattern; the crowns are blunt for teeth at the sides of the jaws, becoming higher and more pointed towards the middle of the jaw. There are 25 upper and 31-32 lower tooth rows. The five pairs of gill slits are S-shaped. The pelvic fins are small with rounded rear margins; males have short, stout claspers.The slender, flattened tail measures 82-90% as long as the disc, and terminates in a low, leaf-shaped caudal fin; there is a prominent skin fold running along each side. A very thin, serrated stinging spine is positioned atop the tail about halfway along its length; immediate in front is a long, low dorsal fin. The skin entirely lacks dermal denticles. The Kapala stingaree is greenish above, becoming pinkish toward the disc margins, and bears a variable pattern of dark markings that usually include a triangular blotch beneath each eye, a V-shaped bar between the eyes, a blotch at the base of the pelvic fins, and a pair of blotches in the middle of the disc that extend into stripes that run onto the tail. Not all individuals have all of these markings, and a few may be mottled or almost black on top. The underside is off-white with a wide, dusky band around the disc margin. The tail is pale with a dark midline stripe above and sometimes scattered dark blotches below; the dorsal fin is greenish and the caudal fin is light with a dark edge in adults, and entirely dark in juveniles. The largest known specimen measures long.