Authority given as '(Klein)' in Mortensen (1931) and as 'Agassiz' in Decary (1924). Type data: status and ... [details]

Colour in life: deep brown above with deep red tips to spines, tube feet fawn (Humphreys, 1981). Associated with ... [details]

Also distributed in Persian Gulf and Bay of Bengal (Clark & Rowe, 1971). [details]

Ecology: benthic, inshore, continental shelf. General distribution: tropical, western Indian Ocean, west Pacific ... [details]

Description: Arm length to 50 mm, disc diameter to 6 mm. Disc smooth, arms with three lateral spines at each ... [details]

Description: as for A. integer, but differs in arrangement of disc scales and shape of the arm plates. Richmond, ... [details]

Description: as for A. integer, but differs in arrangement of disc scales and shape of the arm plates. (Richmond, ... [details]

Ecology: benthic, inshore. General distribution: tropical, west Pacific (also Red Sea), depth range 6-40 m. (Rowe & ... [details]

Description: arm length to 27 mm, disc diameter to 3.5 mm. Disc and arms mottled grey, pale blue and cream. ... [details]

Disc covered by very fine scales. Radial shields three times as long as broad, distally contiguous. Oral shields ... [details]

Disc covered by fine imbricated scales, one slightly larger plate in each interradius dorsally. Radial shields ... [details]

Also distributed in East Indies, north Australia, China and south Japan (Clark & Rowe, 1971). [details]

Also distributed in East Indies, Philippine, China and south Japan (Clark & Rowe, 1971); Australia (Rowe & Gates, ... [details]

Also distributed in New Caledonia (Clark, 1954); Maldive area, Bay of Bengal , East Indies, north Australia, ... [details]

Colour in life: deep pink centre to disc grading through white to light purple arm tips (Humphreys, 1981). ... [details]

Also distributed in Bay of Bengal, Philippine, China and south Japan (Clark & Rowe, 1971). [details]

Also distributed around Philippine Islands (Clark & Rowe, 1971) to the South West of Japan (Rowe, 1977). [details]

Colour in life: pale grey with irregular brown markings, uniformly pale grey below. Some with commensal polynoid ... [details]

Description: as for A. nuda, but with thorny granules of varying size over the body and arms (Richmond 1997). Also ... [details]

Description: Arm length to 40 cm, disc diameter to 10 cm. Colour uniformly black. Habitat: coral reefs, usually ... [details]

Also distributed in East Indies, north Australia and Philippines (Clark & Rowe, 1971); Australia (Rowe & Gates, ... [details]

Also distributed in SE Arabia, Ceylon, Bay of Bengal and East Indies (Clark & Rowe, 1971). [details]

Also distributed in Ceylon and Bay of Bengal (Clark & Rowe, 1971). [details]

Coulour in life: paxillae vary from cream through grey-green to brown, usually with darker patterning variable in ... [details]

Also distributed in SE Arabia, Maldive area, Ceylon, Bay of Bengal, East Indies, north Australia, Philippine, ... [details]

Also distributed in Maldive area, East Indies, Philippine and South Pacific Is. (Clark & Rowe, 1971); Australia ... [details]

Colour in life: bold camouflage pattern in deep brown and beige, tube feet spread over surface give white dotted ... [details]

Also distributed in Philippine and South Pacific Is. (Clark & Rowe, 1971). Habitat: very shallow waters; coastal ... [details]

Littoral and down to 39 fathoms (A.H. Clark, 1911). [details]

Description: primary tubercles perforate and crenulate; ambulacra abruptly narrowing on oral side with spaced ... [details]

Also distributed in SE Arabia, Ceylon, Bay of Bengal, East Indies, Philippine, China and south Japan (Clark & Rowe, ... [details]

Also distributed in SE Arabia, Persian Gulf, W India, Pakistan, Ceylon, East Indies, north Australia, Philippine ... [details]

Description: test flat, pentagonal, corners rounded, margin slightly thick; oral ambulacral furrows prominent up to ... [details]

Also distributed in Marshall Islands (Clark, 1954); SE Arabia, Persian Gulf, W India, pakistan, Maldive area, ... [details]

Colour in life: black to deep purple-brown, peristome reddish-brown (Humphreys, 1981). Also recorded in Hawaiian ... [details]

According to Clark & Rowe (11971), known from Mauritius (and East Africa) and from temperate but not tropical ... [details]

Also distributed in north Australia (Clark & Rowe, 1971); Australia (Rowe & Gates, 1995). Ecology: benthic, ... [details]

Colour in life: dark grey background with small irregular pink patches mostly adjacent to black tubercles, ... [details]

Also distributed in East Indies, north Australia, Philippine, South Pacific Is. and Hawaiian Is. (Clark & Rowe, ... [details]

Also recorded in Persian Gulf, W India, Pakistan and Maldive area (Clark & Rowe (1971)); Maldives (Marshall & Rowe, ... [details]

Colour in life: black, red ring around anus and white spot over each genital pore (Humphreys, 1981). One specimen ... [details]

Colour in life: golden brown to dark brown with large irregular brown markings transversely on arms (Humphreys, ... [details]

Also distributed in South Pacific Is. and Hawaiian Is. (Clark & Rowe, 1971). [details]

Also distributed in Marshall Islands (Clark, 1954); South Pacific Is. (Clark & Rowe, 1971). [details]

Description: test flat, slightly broader than long; peristome slightly anterior; periproct on the oral side, in the ... [details]

Also distributed in SE Arabia, Persian Gulf, Ceylon, Bay of Bengal and East Indies (Clark & Rowe, 1971). [details]

Also distributed in SE Arabia, Ceylon, Bay of Bengal, East Indies and South Pacific Is. (Clark & Rowe, 1971). [details]

Also distributed in Ceylon, Bay of Bengal, East Indies and north Australia (Clark & Rowe, 1971); Australia (Rowe & ... [details]

Colour in life: variable, spine colour purple/green spines with purple tips and grey-green base or jungle green ... [details]

Also distributed in East Indies, South Pacific Is. and Hawaiian Is. (Clark & Rowe, 1971). [details]

Colour in life: deep red unlike Aldabra specimens which are green (Humphreys, 1981). Also recorded from 'Coin ... [details]

Habitat: deep rounded vertical burrows in dead coral rocks (Sastry, 1997). Also distributed in SE Arabia, W India, ... [details]

Colour in life: purplish-brown, inter-ambulacral spines with fine to broad transverse white bands, tissue at base ... [details]

Also distributed in Onotoa Atoll, Marshall Islands, Tuamotus, Guam, Saipan (Clark, 1954); SE Arabia, Maldive area, ... [details]

Also distributed in Tuamotus and Guam (Clark, 1954); Maldive area, Ceylon, Bay of Bengal, East Indies, north ... [details]

Also distributed in Ceylon, Bay of Bengal and East Indies (Clark & Rowe, 1971). [details]

Also distributed in Marshall Islands (Clark, 1954); Maldive area, Bay of Bengal, East Indies, Philippines, China, ... [details]

Also distributed in Maldive area and Ceylon (Clark & Rowe, 1971). [details]

Also distributed in Gilbert Islands (Clark, 1954); Ceylon bay of Bengal, East Indies, north Australia, China, south ... [details]

Also distributed in Persian Gulf, Ceylon and Bay of Bengal (Clark & Rowe, 1971). [details]

Also distributed in East Indies, north Australia, China and south Japan (Clark & Rowe, 1971). [details]

Also distributed in Tuamotus, Saipan, New Caledonia (Clark, 1954); SE Arabia, Maldive area, Ceylon, East Indies, ... [details]

Colour in life: uniformly mid brown (Humphreys, 1981). Also distributed in Marshall Islands, Tuamotus, Canton ... [details]

Also distributed in Persian Gulf, west Indian and Pakistan (Clark & Rowe (1971)). [details]

Littoral and down to 12 fathoms in Clark (1911). Also distributed in SE Arabia, Persian Gulf ( (Clark & Rowe (1971)). [details]

Also distributed in Amboina (Selenka, 1867); East Indies, Philippine and South Pacific Is. (Clark & Rowe, 1971). [details]

Colour in life: grey-brown to green-brown sometimes with globular appearance (Clark & Rowe, 1971). The colour is ... [details]

Colour in life: mid brown above with gnarled appearance (Humphreys, 1981). Also distributed in Celebes and Amboina ... [details]

Also distributed in East Indies and north Australia (Clark & Rowe, 1971); Australia (Rowe & Gates, 1995). Ecology: ... [details]

Also distributed in Iranian Gulf (Heding, 1940); Maldive area, Bay of Bengal, East Indies, north Australia, China ... [details]

Also recorded from the Philippines, Iranian Gulf and Ceylon (Heding, 1940); Persian Gulf, Ceylon, north Australia ... [details]

Also distributed in Bay of Bengal, East Indies, north Australia, Philippine, China, south Japan and South Pacific ... [details]

Also distributed in Ceylon, East Indies and north Australia (Clark & Rowe, 1971). [details]

Colour in life: background off-white with pale purplish brown blotches, dark pigment surrounding mouth and anus ... [details]

Also distributed in Bay of Bengal, East Indies, north Australia, Philippine and South Pacific Is. (Clark & Rowe, 1971). [details]

Also distributed in SE Arabia and Persian Gulf (Clark & Rowe (1971)). [details]

Colour in life: burgundy with irregular pink markings on arms, madreporite and patch at tip of each arm purple, ... [details]

Colour in life: uniformly fawn (Humphreys, 1981). Also distributed in SE Arabia, Persian Gulf, Maldive area, ... [details]

Colour in life: uniformly blue, grey, pink, purple or fawn. This contrasts with Pacific specimens from Palao ... [details]

Also distributed in Japan and north of Australia (Lambert, 1923); SE Arabia, Persian Gulf, Maldive area, Ceylon, ... [details]

Also distributed in Bay of Bengal, East Indies, Philippine, China and south Japan (Clark & Rowe, 1971). [details]

Also distributed in SE Arabian, Persian Gulf, Maldive area, Ceylon, Bay of Bengal, East Indies, north Australia, ... [details]

Also distributed in Ceylon, Bay of Bengal, Philippine and South Pacific Is. (Clark & Rowe, 1971). [details]

Disc colour purplish-brown, with some variegation, but never any trace of a longitudinal light stripe (Balinsky, ... [details]

Colour in life very variable but not spotted like M. Longipeda (Sloan et al., 1979). Description: similar to M. ... [details]

Description: similar to M. longipeda (Richmond, 1998). Arms moderately long, about nine times the disc diameter. ... [details]

Colour in life: disc colour bluish with dark blue spots, spotted radial shields, ventrally lighter blue with dark ... [details]

Description: similar to M. longipeda (Richmond, 1998). Distribution: known only from Mauritius (Clark, 1968); ... [details]

Also distributed in SE Arabia, Maldive area, Cylon, Bay of Bengal, East Indies, north Australia, Philippine, China, ... [details]

General distribution: Red Sea, western Indian Ocean (Tortonese, 1980). Also distributed in SE Arabia (Clark & ... [details]

Also distributed in Bay of Bengal and East Indies (Clark & Rowe, 1971). [details]

Colour in life: slate grey with purplish borders to supero-marginals, medreporite with circle of ten purplish ... [details]

Colour in life: granules between plates mid brown, rest black, abactinal surface light grey-brown. Eaten by shrimp ... [details]

Also distributed in north Australia (Clark & Rowe (1971) and Rowe & Gates (1995)). Ecology: benthic, inshore. ... [details]

Also distributed in East Indies (Clark & Rowe, 1971). [details]

Coloration: aboral disc colour green to brownish, with some variegation, with a dark spot near the distal end of ... [details]

Colour: olive-greenish on a white background (Balinsky, 1957). Ecology: benthic, inshore. General distribution: ... [details]

Colour (in alcohol): disc greyish-brown, the arms distinctly banded with rusty brown; the arm spines somewhat ... [details]

Colour greenish, without conspicuous markings (Balinsky, 1957). Also distributed in SE Arabia (Clark & Rowe, 1971). [details]

Hexamerous species. Colour in life: green background, disc with more or less regular dark and light green markings, ... [details]