Tetragnatha nitens

(Audouin, 1826)

Nitens long-jawed spider

Tetragnatha nitens is a long-jawed weaver with a cosmotropical distribution spanning tropical and subtropical Asia, where it is , and numerous regions including the Americas, Macaronesia, Mediterranean Europe, Africa, Madagascar, Pacific islands, and New Zealand. The constructs horizontal orb webs in vegetation and has demonstrated ecological adaptability across diverse including Fynbos, Grassland, Savanna, and Thicket. Listed as Least Concern due to its wide geographic range and presence in multiple protected areas.

Tetragnatha nitens by (c) Julien Tchilinguirian, some rights reserved (CC BY), uploaded by Julien Tchilinguirian. Used under a CC-BY license.Tetragnatha nitens by (c) Robert Whyte, some rights reserved (CC BY). Used under a CC-BY license.Tetragnatha nitens by (c) Julien Tchilinguirian, some rights reserved (CC BY), uploaded by Julien Tchilinguirian. Used under a CC-BY license.

Pronunciation

How to pronounce Tetragnatha nitens: //ˌtɛtrəˈɡnæθə ˈnaɪtɛnz//

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Identification

Identification to level requires examination of and precise measurements of length relative to length, plus relative spacing—features not reliably assessed from field observations alone. The specific epithet 'nitens' refers to a appearance, though this trait alone is insufficient for definitive identification.

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Habitat

Constructs webs in vegetation. Recorded from diverse including Fynbos, Grassland, Indian Ocean Coastal Belt, Savanna, and Thicket. In South Africa, occurs from sea level to 1399 m elevation. Specimens have been sampled from trees adjacent to water bodies during daytime.

Distribution

to tropical and subtropical Asia; and established in the Americas, Macaronesia (Madeira, Canary Islands), Mediterranean Europe, Egypt, Saint Helena, South Africa, Madagascar, Pacific islands, and New Zealand. In South Africa, known from six provinces including five protected areas. Recently recorded from Tamil Nadu, South India.

Life Cycle

Females in silken egg sacs; sac placement and attachment style varies among Tetragnatha , with some adhered to substrates and others suspended at web periphery.

Behavior

Constructs webs in horizontal or near-horizontal orientation, distinguishing this from vertically-oriented Araneidae orb weavers. Tolerates proximity with individual webs built in close proximity to others.

Ecological Role

of flying ; webs positioned to intercept aquatic insect (, , ) emerging from water.

Human Relevance

No documented direct impacts; presence in human-modified environments and protected areas suggests adaptability.

Similar Taxa

  • Tetragnatha viridisEasy to distinguish—T. viridis is emerald green with no similar in eastern North America, whereas T. nitens lacks this distinctive coloration.
  • Tetragnatha guatemalensisT. guatemalensis exhibits essentially social with communal webs spanning acres; T. nitens builds individual webs with only for proximity.
  • Araneidae (typical orb weavers)Tetragnathidae construct horizontal webs versus the vertical webs of most Araneidae; also distinguished by elongated bodies and exceptionally long .

More Details

Etymology

The specific epithet 'nitens' is Latin for '' or 'brilliant'.

Taxonomic history

Originally described from Egypt; revised by Okuma and Dippenaar-Schoeman in 1988.

Conservation status

IUCN Least Concern; no significant threats identified despite wide distribution including multiple protected areas in South Africa (Roodeplaatdam Nature Reserve, Addo Elephant National Park).

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Sources and further reading