Classificazione / Nomi
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Perciformes/Serranoidei (Groupers) >
Anthiadidae (Fairy basslets or Streamer basses)
Etymology: Xenanthias: Although Regan (1908) did not specific the allusion of Xenanthias, the name is probably the combination of ξένος (xénos, meaning strange or foreign), and anthias, possibly an indication to a strange anthias; polygonius: Named for the orange rhomboid-shaped polygons in parallel rows along the lateral midline that distinguish it from all its congeners; Noun in apposition.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
marino associati a barriera corallina; distribuzione batimetrica 105 - 120 m (Ref. 122130). Tropical
Pacific Ocean: French Polynesia, Tahiti and the Marshall Is.
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 3.2 cm SL maschio/sesso non determinato; (Ref. 122130)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Spine dorsali (totale) : 10; Raggi dorsali molli (totale) : 16; Spine anali: 3; Raggi anali molli: 7; Vertebre: 26. This species is distinguished from its congeners by the following set of characters: : colouration when alive, in particular the two rows of orange rhomboid-shaped polygons on the lateral part of the body and an elongated yellow and white third dorsal spine; D X,16; pectoral-fin rays 14, all unbranched; vertebrae 10 + 16; continuous lateral line with 27-30 tubed scales; circumpeduncular scales 10-11; preopercle without antrorse spines (Ref. 122130).
Cross section: compressed.
Collected (with hand nets) in highly complex reefs predominantly covered by coralline algae and sponges and crevices of steep reef walls, indicating that this species probably has a wider Pacific distribution and all known individuals have been observed or collected at mesophotic depths, suggesting as with most of its congeners, this species does not inhabit shallow coral reef habitats (Ref. 122130).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Shepherd, B., T.A.Y. Phelps, H.T. Pinheiro, C.R. Rocha and L.A. Rocha, 2020. Two new species of Plectranthias (Teleostei, Serranidae, Anthiadinae) from mesophotic coral ecosystems in the tropical Central Pacific. ZooKeys 941:145-161. (Ref. 122130)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Pesca: di nessun interesse
Strumenti
Rapporti speciali
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Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00621 - 0.03212), b=3.00 (2.81 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 3.5 ±0.5 se; based on size and trophs of closest relatives
Resilienza (Fonte Biblio.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.).
Vulnerabilità della pesca (Ref.
59153): Low vulnerability (10 of 100).
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