
Leucauge argentina (van Hasselt, 1882)
Specific studies on Leucauge argentina are limited,
information from closely related species within the genus provides
insights into its biology and behavior. Further research is needed to
fully understand the unique aspects of this species.
1. Taxonomy & Classification
- Scientific Name: Leucauge argentina
(van Hasselt, 1882)
- Family: Tetragnathidae (Long-jawed orb weavers)
- Genus: Leucauge
Historical Descriptions and Taxonomic Revisions:
Leucauge argentina was first described by van Hasselt in
1882. The genus Leucauge was established earlier by Adam White
in 1841, based on specimens collected by Charles Darwin in 1832 . Over
time, the genus underwent taxonomic revisions to clarify species
classifications.
History of Discovery:
The initial specimens of Leucauge argentina were collected
in Southeast Asia, with records indicating its presence in Singapore and
Indonesia . Specific details about the original collector or the current
location of type specimens are not readily available.
2. Physical Description
- Size:
- Female: Approximately 4 - 5 mm
- Male: Approximately 3 mm
- Distinctive Features:
- Elongated body and legs
- Silvery or golden spots on the abdomen
- Two rows of long, slender curved hairs on the femurs of the
fourth leg
Sexual Dimorphism:
Females are generally larger than males. Detailed morphological
differences between sexes are not extensively documented.
Comparison with Other Leucauge Species:
While many Leucauge species share the characteristic
elongated bodies and metallic sheen, L. argentina is
distinguished by its specific abdominal markings and size. For instance,
Leucauge venusta exhibits a silvery-white abdomen with various
colored markings, differing from the more uniform spots of L.
argentina .
Genus Uniqueness:
Members of the genus Leucauge are recognized for their
horizontal orb webs and specific leg hair patterns, setting them apart
from other genera within the Tetragnathidae family .
3. Habitat & Distribution
- Geographical Distribution:
- Singapore, Indonesia (Sumatra), Philippines, Taiwan
- Preferred Environments:
- Low vegetation along jungle tracks, Rainforests, Gardens, Areas near water sources
4. Web Structure & Hunting Behavior
- Web Design:
- Horizontal orb webs
- Open hub with few, wide-set radii and spirals
- Absence of a signal line or retreat (PBase)
- Hunting Behavior:
- Typically rests in the center of the web, facing downward
- Captures prey that flies into the web
- When alarmed, may drop from the web using a silk thread to
escape predators
5. Reproduction & Life Cycle
- Mating Behaviors:
- Specific mating behaviors of L. argentina are not
well-documented. However, related species exhibit complex
courtship rituals involving web vibrations and physical
displays.
- Egg Sac Placement:
- Females construct egg sacs, often attaching them to
vegetation near their webs. Detailed descriptions for L.
argentina are lacking.
- Development Stages:
- Spiderlings emerge from the egg sac and begin constructing
webs early in their development. In related species like
Leucauge mariana, spiderlings display web-building
behaviors similar to adults shortly after hatching .

Leucauge argentina
(細腹金蛛,長顎蛛科 Tetragnathidae)
1. 分類學與命名
- 學名:Leucauge argentina(van Hasselt,
1882)
- 科別:Tetragnathidae(長顎蛛科)
- 屬別:Leucauge
歷史描述與分類修訂:
Leucauge argentina 首次由 van Hasselt 於1882年描述。Leucauge
屬則由 Adam White 於1841年建立,部分標本由達爾文於1832年採集。此屬經過多次分類學修訂以釐清各物種間的關聯。
發現歷史:
本種標本最早發現於東南亞,包括新加坡與印尼。目前尚無明確記載指出原始標本的收藏地。
2. 外形描述
- 體型:
- 特徵:
- 細長的身軀與腿部
- 腹部綴有銀色或金屬色斑點
- 第四對腿的股節上有兩排長而彎曲的刺毛
雌雄差異:
雌蛛體型明顯較雄蛛大,形態也略有差異。
與其他 Leucauge 種的比較:
本種腹部斑點排列與大小是主要辨識特徵,與例如 Leucauge venusta(有彩色斑紋)相比,其體色更為一致。
屬的獨特性:
Leucauge 屬的蛛網多呈水平排列,且腿部刺毛排列具特色,有別於其他長顎蛛屬。
3. 棲息地與分布
- 地理分布:
- 婆羅洲(砂拉越、沙巴)
- 新加坡、印尼、菲律賓、台灣
- 棲息環境:
4. 蛛網與捕食行為
- 蛛網結構:
- 水平或略斜的圓網
- 中心開放,蛛網輻射條與螺旋條較疏
- 無信號線或躲藏處
- 捕食行為:
- 通常停留在網中央,頭部朝下
- 獵物撞網後立即制伏並注入毒液
- 受驚時會順絲垂落逃逸
5. 繁殖與生命周期
- 交配行為:
- 卵囊放置:
- 發育階段:
- 幼蛛孵化後不久即能自行結網
- 經過多次蛻皮成長為成蛛

Leucauge argentina
(Labah-labah Perak Panjang, Keluarga
Tetragnathidae)
1. Taksonomi & Klasifikasi
- Nama Saintifik: Leucauge argentina
(van Hasselt, 1882)
- Famili: Tetragnathidae
- Genus: Leucauge
Sejarah Taksonomi:
Spesies ini pertama kali dijelaskan oleh van Hasselt pada tahun 1882.
Genus Leucauge sendiri ditubuhkan oleh Adam White pada tahun
1841, berdasarkan spesimen yang dikumpulkan oleh Darwin.
Sejarah Penemuan:
Spesimen awal dikumpul dari Asia Tenggara termasuk Singapura dan
Indonesia. Lokasi simpanan spesimen jenis tidak direkodkan secara
terperinci.
2. Ciri-ciri Fizikal
- Saiz:
- Betina: +- 4 - 5 mm
- Jantan: +- 3 mm
- Ciri Unik:
- Badan dan kaki panjang
- Abdomen berkilau keperakan atau keemasan
- Dua baris bulu panjang melengkung pada kaki keempat
Perbezaan Jantan dan Betina:
Betina lebih besar dan lebih dominan secara fizikal.
Perbandingan dengan Spesies Leucauge Lain:
L. argentina memiliki tanda yang lebih seragam berbanding
spesies lain seperti Leucauge venusta yang lebih berwarna.
Keunikan Genus:
Genus ini dicirikan oleh bentuk jaring horizontal dan struktur bulu kaki
yang khas, berbeza daripada genus Tetragnathidae yang lain.
3. Habitat & Taburan
- Taburan Geografi:
- Borneo (Sarawak, Sabah)
- Singapura, Indonesia, Filipina, Taiwan
- Habitat Pilihan:
- Laluan hutan, kebun, tumbuhan rendah
- Kawasan berhampiran air seperti sungai atau paya
4. Struktur Jaring & Perangai Memburu
- Bentuk Jaring:
- Orb-web (bulat), biasanya horizontal
- Tidak mempunyai tempat persembunyian atau talian isyarat
- Perangai Memburu:
- Duduk di tengah jaring menghadap ke bawah
- Menangkap serangga yang terperangkap
- Melepaskan diri dengan menjatuhkan diri menggunakan benang
sutera bila terancam
5. Pembiakan & Kitaran Hidup
- Perangai Mengawan:
- Menggunakan getaran jaring sebagai sebahagian ritual
mengawan
- Maklumat lanjut untuk spesies ini masih kurang
- Penempatan Telur:
- Telur diletakkan dalam sarung (egg sac) dan dilekatkan pada
tumbuhan
- Perkembangan:
- Anak labah-labah mula membuat jaring sendiri selepas menetas
- Melalui beberapa peringkat penjelmaan sebelum menjadi dewasa