Notochthamalus

Notochthamalus scabrosus, the only species in the genus Notochthamalus,[1][3] is a species of barnacle found along the south-western and south-eastern coasts of South America, from Peru to the Falkland Islands.[4] The species is found almost exclusively higher in the intertidal zone than the mussel Perumytilus, often codistributed with the confamilial barnacle Jehlius cirratus and Balanus flosculus.[2]: 468 [5]

Notochthamalus
Top view by Melissa Merrill
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Thecostraca
Subclass: Cirripedia
Order: Balanomorpha
Family: Chthamalidae
Genus: Notochthamalus
Foster & Newman, 1987[1]: 326 
Species:
N. scabrosus
Binomial name
Notochthamalus scabrosus
(Darwin, 1854)[2]: 468 
Synonyms

Chthamalus scabrosus Darwin, 1854

Diagnosis and discussion
Three barnacles of Notochthamalus scabrosus (the one on the bottom left is of the genus Jehlius)

Notochthamalus is composed of 6 compartmental plates, composed of a carina, rostrum, and paired carinolatera and rostrolatera. Sutures between plates made up of poorly developed oblique folded laminae with membraneous basis. Plates are colored dull purplish brown, weathering to gray. Free-growing shellis are conic, crowded colonies become cylindrical, with plate sutures obscured. Opercular plates are narrow and deeply interlocked.[2]: 468  The interior of the tergum shows a tergal depressor muscle pit with overhang and no crests, or only relics thereof. Neither shell nor opercular plates show secondary fusion with age.[1][6]: 79  The best character for field identification are the undulations along the tergal-scutal margins. Given the overall appearance of the operculum of Notochthamalus, it is sometimes called the "vampire barnacle".

Notochthamalus
  • Notochthamalus Foster & Newman, 1987;[1]: 326  (original description).
  • Type species: Chthamalus scabrosus Darwin, 1854: 468, original designation by Foster & Newman, 1987, and by monotypy.

Notochthamalus scabrosus
  • Chthamalus scabrosus Darwin, 1854;[2]468 (original description): Newman & Ross, 1976,[7]42 (see for pre-1976 bibliography).
  • Notochthamalus scabrosus (Darwin). Foster & Newman, 1987,[1]: 326  (generic re-assignment): Poltarukha,[8]: 993 [6]: 79  (discussion, supplementary description).
  • Type locality: Not given in Darwin, 1854, or Pilsbry, 1916.
  • Type specimens: Not given in Darwin, 1854. Pilsbry's 1916 reference specimens from Valparaiso, Chile are USNM No. 48089.[9]323

Geographic range and habitat

Notochthamalus scabrosus prefers exposed upper littoral habitats, and can be found on the South American coastline from Peru through Chile, Chiloe Archipelago, and Tierra del Fuego. It co-occurs there with Jehlius cirratus. In the Atlantic Ocean, it is very common on the Falkland Islands.[2]468[6]: 79 [5]

References
  1. Brian A. Foster & William A. Newman (1987). "Chthamalid Barnacles of Easter Island. Peripheral Pacific Isolation of Notochthamalinae new-subfamily and Hembeli group of Euraphiinae (Cirripedia: Chthamaloidea)". Bulletin of Marine Science. 41 (2): 322–336.
  2. Darwin, Charles (1854). A monograph on the sub-class Cirripedia with figures of all species. The Balanidae, the Verrucidae, etc. London: Ray Society. pp. 1–684.
  3. William A. Newman & Brian A. Foster (1987). "Southern Hemisphere endemism among the barnacles: explained in part by extinction of northern members of amphitropical taxa?". Bulletin of Marine Science. 41 (2): 361–377.
  4. Jessica Curelovich, Gustavo A. Lovrich & Javier A. Calcagno (2009). "Nueva localidad para Notochthamalus scabrosus (Crustacea, Cirripedia): Bahía Lapataia, Canal Beagle, Tierra del Fuego, Argentina" [New locality for Notochthamalus scabrosus (Crustacea, Cirripedia): Bahía Lapataia, Beagle Channel, Tierra del Fuego, Argentina] (PDF). Anales del Instituto de la Patagonia (Chile) (in Spanish). 37 (2): 47–50. doi:10.4067/s0718-686x2009000200005.
  5. "World Register of Marine Species, species Jehlius cirratus". Retrieved 2021-08-31.
  6. Poltarukha, O. P. (2006). Identification Atlas of Superfamily Chthamaloidea (Cirripedia Thoracica) barnacles in World Ocean. Moscow: KMK Scientific Press, Ltd. pp. 1–198 [In Russian]. ISBN 978-5-87317-278-8.
  7. Newman, W. A.; A. Ross (1976). "Revision of the Balanomorph Barnacles including a catalog of the species". Memoirs of San Diego Society of Natural History. 9: 1–108.
  8. Poltarukha, O. P. (1996). "Composition, phylogeny and position in system of subfamily Notochthamalinae (Crustacea, Chthamalidae)". Zoologicheskii Zhurnal. 75 (7): 985–994. ISSN 0044-5134.
  9. Pilsbry, H. A. (1916). "The sessile Barnacles (Cirripedia) contained in the collections of the US National Museum; including a monograph of the American species". Smithsonian Institution United States National Museum Bulletin. 93 (93): 1–366. doi:10.5479/si.03629236.93.1. hdl:2027/nyp.33433010733677.

Data related to Notochthamalus at Wikispecies


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