Definition
Linckia guildingi is a species of marine echinoderm belonging to the class Asteroidea (starfish) within the family Ophidiasteridae. It is commonly referred to as the “striped Linckia” or “Guilding’s starfish.”
Overview
Linckia guildingi is a widely distributed starfish inhabiting tropical and subtropical waters of the Indo‑Pacific region, including the Red Sea, East Africa, the Philippines, and northern Australia. Adults are typically found on coral reefs, sandy substrates, and rocky bottoms at depths ranging from the intertidal zone down to about 50 m. The species is notable for its capacity for asexual reproduction through fission, a characteristic shared with other members of the genus Linckia.
Etymology/Origin
The generic name Linckia honors German naturalist Johann Heinrich Lincke (1734–1805). The specific epithet guildingi is presumably derived from the surname of a person named Guilding (or Guilding), likely a naturalist or collector associated with the species’ discovery, although primary taxonomic literature does not provide a definitive explanation. Accurate information on the precise origin of the epithet is not confirmed.
Characteristics
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Morphology: Adults possess five broad, slightly pentagonal arms radiating from a central disc. The dorsal surface exhibits a pattern of longitudinal stripes or bands ranging from pale yellow to orange‑brown, often with darker marginal lines. The aboral (upper) surface is covered with small ossicles and spines, while the oral (underside) side bears tube feet used for locomotion and feeding. Typical arm length ranges from 8 to 12 cm, with a total diameter of 10–15 cm.
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Coloration: Color varies geographically but commonly includes shades of yellow, orange, or brown with contrasting darker stripes. Juveniles may display more uniform coloration before banding becomes distinct.
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Reproduction: In addition to sexual reproduction via broadcast spawning of gametes, L. guildingi frequently reproduces asexually by fissiparity. Individuals can undergo transverse fission, separating into two parts that each regenerate the missing half, resulting in clonally related offspring.
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Diet: Primarily detritivorous and algivorous, feeding on biofilm, microalgae, and organic particles. Occasionally consumes small invertebrates.
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Habitat Preferences: Prefers well‑lit reef flats and lagoonal environments where algal growth is abundant. Tolerates a range of substrate types but is most commonly observed on coral rubble and sand.
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Conservation Status: Not assessed by the IUCN Red List; however, the species is considered common throughout most of its range and does not currently face major threats beyond general reef degradation.
Related Topics
- Genus Linckia – a group of starfish noted for their regenerative abilities and widespread Indo‑Pacific distribution.
- Fissiparity in echinoderms – the process of asexual reproduction by splitting of the body, prominent in several Linckia species.
- Ophidiasteridae – the family containing Linckia and related genera such as Ophidiaster and Gomophia.
- Coral reef ecosystems – the primary habitat for L. guildingi, supporting diverse marine life.
- Echinoderm morphology – the anatomical features characteristic of starfish, including the water vascular system and tube feet.