- "July 2022 Jor Spider: Trichonephila Clavata - Overview and Characteristics
Jorō spider
Trichonephila clavata
Mary Nouri, Arnoldsville, GA
July 2022
Overview
•
Native to East Asia
•
Detected in GA in 2014
•
One generation per year in
native range
Sarah Morgan, Cumming, GA
Eggs
•
Egg sacs laid mid-October to
November
•
Dense, white silk sacs contain
400-500 eggs
•
Attached to leaves, tree bark,
and human-made structures
Wesley Huffmaster, Colbert, GA
Adult females
•
0.67-1.2 in (17-30 mm) long
•
Bright yellow, with broad,
horizontal bluish-green bands on
the top side of the abdomen
large red markings on the
bottom side of the abdomen
•
Long, black legs with yellow-
orange bands; rarely all black
•
Sexually mature in September
and October
Mary Nouri, Arnoldsville, GA
Adult males
•
0.16-0.31 in (4-8 mm) long
•
Cephalothorax is light brown
with two dark brown long stripes
on both sides
•
Abdomen is elongate-oval,
topside a greenish-brown with
two yellowish long stripes on
both sides of the dark brown
middle line
Wesley Huffmaster, Colbert, GA
Lookalike
Jorō spider
(
Trichonephila clavata
)
golden silk orb-weaver
(
Trichonephila clavipes
)
Comparing mature females
1
st
, 2
nd
, and 4
th
pairs of legs have
black tufts of hair
near joints
Mary Nouri, Arnoldsville, GA
Chris Evans, University of Illinois, Bugwood.org
Abdomen
Yellow-orange
with white spots
Legs yellow-
orange with
brown bands
Abdomen bright
yellow, with broad,
horizontal bluish-
green bands
Legs black with
yellow bands,
rarely all black
Legs
lack
black
tufts of hair
near joints
- The July 2022 Jor Spider, scientifically known as Trichonephila Clavata, was detected in Georgia in 2014. This spider is native to East Asia but has made its way to Georgia. It lays its eggs in mid-October to November in dense, white silk sacs that contain hundreds of eggs. Adult females are bright yellow with distinct markings, while males are smaller with a different coloration. It is important to distinguish this species from the similar-looking golden silk orb-weaver. The provided images and detailed descriptions help in identifying the key features of this spider.
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Presentation Transcript
July 2022 Jor spider Trichonephila clavata Mary Nouri, Arnoldsville, GA
Overview Native to East Asia Detected in GA in 2014 One generation per year in native range Sarah Morgan, Cumming, GA
Eggs Egg sacs laid mid-October to November Dense, white silk sacs contain 400-500 eggs Attached to leaves, tree bark, and human-made structures Wesley Huffmaster, Colbert, GA
Adult females 0.67-1.2 in (17-30 mm) long Bright yellow, with broad, horizontal bluish-green bands on the top side of the abdomen large red markings on the bottom side of the abdomen Long, black legs with yellow- orange bands; rarely all black Sexually mature in September and October Mary Nouri, Arnoldsville, GA
Adult males 0.16-0.31 in (4-8 mm) long Cephalothorax is light brown with two dark brown long stripes on both sides Abdomen is elongate-oval, topside a greenish-brown with two yellowish long stripes on both sides of the dark brown middle line Wesley Huffmaster, Colbert, GA
Jor spider golden silk orb-weaver (Trichonephila clavipes) Lookalike Comparing mature females (Trichonephila clavata) Chris Evans, University of Illinois, Bugwood.org Mary Nouri, Arnoldsville, GA Abdomen Yellow-orange with white spots Legs black with yellow bands, rarely all black Abdomen bright yellow, with broad, horizontal bluish- green bands Legs yellow- orange with brown bands 1st, 2nd, and 4th pairs of legs have black tufts of hair near joints Legs lack black tufts of hair near joints
