Tetrablemma Explained

Tetrablemma should not be confused with tetralemma.

Tetrablemma is a widespread genus of armored spiders first described by Octavius Pickard-Cambridge in 1873.[1] It contains 30 species found in tropical and subtropical regions primarily throughout Asia and Oceania, with one species, Tetrablemma rhinoceros, known from Angola.[2] [3] They are found in leaf litter, soil, and caves.

The genus contains some of the only species of spiders to have just four eyes along with some species of Caponiidae, to which they are not closely related.[4] [5] The eyes are large and unequal in size, closely grouped around the center of the cephalothorax, with the eye group tending to be set further back in males. The genus contains some variation in eye arrangement, as Tetrablemma alaus, a subterranean species, lacks eyes or any eye spots entirely.[6] They have four closely positioned spinnerets enclosed in a corneous casing.[1]

Lehtinen divided the genus into three subgenera in 1981: Kumaonia, Indonops, and Tetrablemma, although this subgeneric arrangement is not always followed by subsequent authors.[7]

Species

, the World Spider Catalog accepted the following species:

Notes and References

  1. Pickard-Cambridge. O.. 1873. On some new genera and species of Araneida. Proceedings of the Zoological Society of London. 41. 1. 112–129.
  2. Etter . Andres . McAlpine . Clive . Possingham . Hugh . Historical Patterns and Drivers of Landscape Change in Colombia Since 1500: A Regionalized Spatial Approach . Annals of the Association of American Geographers . 5 February 2008 . 98 . 1 . 2–23 . 10.1080/00045600701733911 . 7 November 2024.
  3. Lehtinen. P. T.. 1981. Spiders of the Oriental-Australian region. III. Tetrablemmidae, with a world revision. Acta Zoologica Fennica. 162. 20.
  4. Book: ((Shear, William A.)) . 1978 . Taxonomic notes on the armored spiders of the families Tetrablemmidae and Pacullidae . American Museum of Natural History .
  5. Wheeler . Ward C. . Coddington . Jonathan A. . Crowley . Louise M. . Dimitrov . Dimitar . Goloboff . Pablo A. . Griswold . Charles E. . Hormiga . Gustavo . Prendini . Lorenzo . Ramírez . Martín J. . Sierwald . Petra . Almeida‐Silva . Lina . Alvarez‐Padilla . Fernando . Arnedo . Miquel A. . Benavides Silva . Ligia R. . Benjamin . Suresh P. . Bond . Jason E. . Grismado . Cristian J. . Hasan . Emile . Hedin . Marshal . Izquierdo . Matías A. . Labarque . Facundo M. . Ledford . Joel . Lopardo . Lara . Maddison . Wayne P. . Miller . Jeremy A. . Piacentini . Luis N. . Platnick . Norman I. . Polotow . Daniele . Silva‐Dávila . Diana . Scharff . Nikolaj . Szűts . Tamás . Ubick . Darrell . Vink . Cor J. . Wood . Hannah M. . Zhang . Junxia . The spider tree of life: phylogeny of Araneae based on target‐gene analyses from an extensive taxon sampling . Cladistics . December 2017 . 33 . 6 . 574–616 . 10.1111/cla.12182 . 7 November 2024.
  6. Burger . Matthias . Harvey . Mark S. . Stevens . Nicholas . A new species of blind subterranean Tetrablemma (Araneae: Tetrablemmidae) from Australia . Journal of Arachnology . April 2010 . 38 . 1 . 146–149 . 10.1636/A09-73.1 . 7 November 2024.
  7. Lehtinen. P. T.. 1981. Spiders of the Oriental-Australian region. III. Tetrablemmidae, with a world revision. Acta Zoologica Fennica. 162. 57.

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