14 de junio de 2020

Revisión del género Ariadna y su distribución en Chile

El siguiente texto es una transcripción de los datos encontrados en la bibliografía al final, con links a los trabajos originales (revisar para ver fotos de las arañas!)
El objetivo es tener información de rápido acceso sobre las especies chilenas pertenecientes a este género.
No interpretar como una revisión definitiva, pero incluye las 6 especies descritas en Chile, si alguien encuentra información complementaria, se agradece compartir en los comentarios ;)


—ARIADNA—

  • Ariadna abrilae
  • Valparaíso (Petorca)
  • Ariadna araucana
  • Araucanía (Cauquenes) - Aysén (+ Chiloé)
  • Ariadna changellkuk
  • Coquimbo (Elqui) - Ñuble
  • Ariadna lalen
  • Maule - Araucanía
  • Ariadna levii
  • Valparaíso (Petorca) - Los Ríos (Valdivia)
  • Ariadna maxima
  • Antofagasta - Magallanes (+ Juan Fernandez Islands)


DIAGNOSIS

  • A. abrilae
  • is similar to A. maxima due to the leg macrosetae of females, but differ by its minute size and the anterior receptaculum with lobes with expanded and rounded tips, and the dorsal lobe sinuous.
  • A. araucana
  • is similar to A. lalen n. sp. due to the presence of reduced mid-portion in the male palp, and females with leg formula II-I-IV-III and absence of the median membranous crack in the interpulmonary fold; males of A. araucana differ from those of A. lalen n. sp. by the presence of sub-rectangular bulb, and mid-portion and embolus tapered; females of A. araucana differ from A. lalen n. sp. by the presence of an anterior receptaculum, flattened laterally, without incrassated regions.
  • A. changellkuk
  • is similar to (...) A. levii and (...) due to the dark abdominal pattern with arrow-shaped marks, but differ by presenting the cephalothorax and abdomen conspicuosly elongated, legs short relatively to its body size, and femur I–II with ventral macrosetae.
  • A. lalen
  • is similar to A. araucana due to the presence of reduced mid-portion in the male palp, and females with leg formula II-I-IV-III and absence of the median membranous crack in the interpulmonary fold; males of Ariadna lalen n. sp. differ from those of A. araucana by the presence of a subrectangular bulb, less rounded than A. araucana, with mid-portion and embolus markedly bended and thickened; females of A. lalen n. sp. differ from A. araucana by the anterior receptaculum, flattened laterally, with the dorsal region incrassated and rounded.
  • A. levii
  • Ariadna levii is similar to (...) A. changellkuk and (...) due to the dark abdominal pattern with arrow-shaped marks, but males differ by the presence of metatarsi I straight with two apophyses: one ventro-prolateral bearing a short and curved macrosetae, and a ventro-retrolateral one, with non-modified macrosetae; females are distinguished by the presence of a dorsal lobe longer than the ventral lobe
  • A. maxima
  • is similar to A. araucana and A. lalen n. sp. due to the morphology of the male metatarsi I and leg macrosetae pattern of females, but differ by the presence of a male metatarsi I sinuous in lateral view, and palps rounded, with the midportion and embolus with similar size; females differ by the anterior receptaculum billobulated, with a large median glandular ducts plate and interpulmonary fold with a dorsal median membranous crack.


BIBLIOGRAFÍA

GRISMADO C (2008) A taxonomic revision of the spider genus Ariadna Audouin, 1826 in Argentina and Chile, with the description of fi ve new species (Arachnida, Araneae, Segestriidae). Zoosystema 30 (2) : 333-360. LINK

MARSOLA-GIROTI A & A DOMINGOS-BRESCOVIT (2018) The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae). Zootaxa 4400 (1): 001–114. LINK - Sci-Hub LINK

Ingresado el 14 de junio de 2020 por aricafoix aricafoix | 0 comentarios | Deja un comentario

24 de abril de 2020

Revisión de la familia Austrochilidae y su distribución en Chile

El siguiente texto es una transcripción de los datos encontrados en la bibliografía al final, con links a los trabajos originales.
El objetivo es tener información de rápido acceso sobre las especies chilenas pertenecientes a esta familia.


—AUSTROCHILUS—

DISTRIBUTION: North-central to south-central Chile (Coquimbo to Osorno) and adjacent Argentina.

  • Austrochilus manni
  • DISTRIBUTION: Northern Chile (Coquimbo and Aconcagua).
  • Austrochilus melon
  • DISTRIBUTION: North-central Chile (Valparaiso to Talca).
  • Austrochilus schlingeri
  • DISTRIBUTION: Known only from the vicinity of El Canelo, Santiago, Chile.
  • Austrochilus franckei
  • DISTRIBUTION: Central Chile (Talca to Cautin) and adjacent Argentina (Neuquen).
  • Austrochilus newtoni
  • DISTRIBUTION: South-central Chile (Cautin to Osorno).
  • Austrochilus forsteri - (NEW 2003)
  • DISTRIBUTION: Known only from type locality. Monumento Natural Contulmo (Malleco, Araucania, Chile)
  • Austrochilus parwis - (NEW 2017)
  • DISTRIBUTION: Known only from type locality. National Park Nahuelbuta (Angol, Araucania, Chile)


—THAIDA—

DISTRIBUTION: South-central to southern Chile (Arauco to Aisen) and adjacent Argentina.

  • Thaida peculiaris
  • DISTRIBUTION: South-central Chile (Arauco to Llanquihue) and adjacent Argentina (Neuquen).
  • Thaida chepu
  • DISTRIBUTION: Southern Chile (Osorno to Aisen).


BIBLIOGRAFÍA

FORSTER RR, N PLATNICK & MR GRAY (1987). A review of the spider superfamilies Hypochiloidea and Austrochiloidea (Araneae, Araneomorphae). Bulletin of the American Museum of Natural History. 185. 1-116. LINK
(Este tiene unos mapas bien buenos!)

GRISMADO C, L LOPARDO & N PLATNICK (2003) A new species of Austrochilus from Chile (Araneae, Austrochilidae, Austrochilinae). Journal of Arachnology. 31. 148-150. LINK

MICHALIK P & J WUNDERLICH (2017) The spider genus Austrochilus Gertsch & Zapfe, 1955 (Araneae: Austrochilidae) - A new species from Chile and a documentation of the male genitalia of austrochilines. Zootaxa. 4312. 323. 10.11646/zootaxa.4312.2.7. LINK

Ingresado el 24 de abril de 2020 por aricafoix aricafoix | 6 comentarios | Deja un comentario

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