Petrolisthes violaceus explained

Petrolisthes violaceus is a species of porcelain crab endemic to the south-eastern Pacific.[1]

Description

Petrolisthes violaceus has planktonic larvae that remain as plankton for more than 25 days.[2] The development of the larvae occurs in four stages: a prezoea, two zoeal stages, and a megalopa stage.[3]

Range

Petrolisthes violaceus' range is from Callao, Peru to the Taitao Peninsula in Chile.

Habitat

It is one of the most common decapods in the intertidal zone of its range. It is a free-living crab, commonly found in crevice, under boulders, or between rocks.[4] Compared to another Petrolisthes species, Petrolisthes laevigatus, it occupies the lower intertidal zone.[5] Compared to P. laevigatus, P. violaceus is more active and more aggressive.[6]

Ecology

Because of the vertical distribution and its intertidal habitat, P. violaceus is regularly exposed to different periods of air exposure, which varies by the heights of the tides. Gaitán-Espitia et al. demonstrated that P. violaceus exhibits a gradient of physiological responses in metabolic and heart rates across a latitude gradient of 3000 kilometers. P. violaceus is better able to cope with water hypoxia due to its position in the lower intertidal zone; it is proposed that in aquatic conditions, P. violaceus has an oxyconformer strategy and is able to adapt its oxygen demands in an oxygen-fluctuating environment.

Taxonomy

Petrolisthes violaceus is the type species of the genus Petrolisthes.[7]

Notes and References

  1. Web site: Petrolisthes violaceus . 6 September 2023 . iNaturalist . en-US.
  2. Book: Thiel . Martin . Evolution and Biogeography: Volume 8 . Poore . Gary . 2020 . Oxford University Press . 978-0-19-063784-2 . 452 . en.
  3. Wehrtmann . Ingo S. . Albornoz . Luis . Pardo . L. Miguel . Véliz . David . 1997 . The Larval Development of Petrolisthes violaceus (Guérin, 1831) (Decapoda, Anomura, Porcellanidae) from Chilean Waters, Cultivated under Laboratory Conditions . Crustaceana . 70 . 5 . 562–583 . 10.1163/156854097X00681 . 20105890 . 0011-216X.
  4. Förster . Carla . Baeza . Juan . 2001-01-01 . Active Brood Care in the Anomuran Crab Petrolisthes Violaceus (Decapoda: Anomura: Porcellanidae): Grooming of Brooded Embryos by the Fifth Pereiopods . Journal of Crustacean Biology . en . 21 . 3 . 606–615 . 10.1163/20021975-99990162 . 0278-0372. free .
  5. Viviani . Carlos A. . 1969 . Los Porcellanidae (Crustacea Anomura) chilenos: Distribución geográfica, y algunas observaciones biocenóticas sobre los porcelánidos en la bahía de Mehuín . Beiträge zur Neotropischen Fauna . en . 6 . 1 . 40–56 . 10.1080/01650526909360413 . 0005-8130.
  6. Lagos . Marcelo E. . Muñoz . José L. . Contreras . Daniela A. . Cáceres . Cristian W. . 2010-11-08 . Microhabitat segregation and physiological differences in two species of intertidal porcellanid crabs (Genus Petrolisthes) on the southern coast of Chile . Scientia Marina . en . 75 . 2 . 273–278 . 10.3989/scimar.2011.75n2273 . 1886-8134. free .
  7. Hiller . Alexandra . Kraus . Holger . Almon . Marc . Werding . Bernd . 2006-08-01 . The Petrolisthes galathinus complex: Species boundaries based on color pattern, morphology and molecules, and evolutionary interrelationships between this complex and other Porcellanidae (Crustacea: Decapoda: Anomura) . Molecular Phylogenetics and Evolution . 40 . 2 . 547–569 . 10.1016/j.ympev.2006.03.030 . 16684610 . 1055-7903.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Petrolisthes violaceus".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.