![]() The broad-faced sac spider belongs to the ground sac spiders family. A later analysis published in 2014 showed that the subfamily was not closely related to the other members in the family, and the subfamily was finally raised to family level. Scavengers, feasting on dead insects and spiders. An analysis of wandering spiders that do not use webs (RTA Clade) published in 2001 suggested that the subfamily belonged in its own family, but no reclassification was made at that time. When that family was split up Trachelas was placed in the family Corinninae. The genus Trachelas was originally included in the the subfamily Trachelinae of the family Clubionidae. "A revision of the tranquillus and speciosus groups of the spider genus Trachelas (Araneae, Clubionidae) in North and Central America. Mixed deciduous and coniferous forests, human houses.Īdult females may overwinter, especially if they find refuge in a heated house. Male Body Length: 3⁄ 16 ″ to ¼ ″ (5 to 6 mm) The second pair is lighter in color, the third pair lighter still, and the fourth pair is the lightest.įemale Body Length: 5⁄ 16 ″ to ⅜ ″ (7.5 to 10 mm) The first pair is medium or dark reddish brown or brownish-red, darker toward the tip. The first pair is thicker than the others and is as long as the fourth pair. There is no cluster of long hairs at the end. There is a darker gray longitudinal stripe on the front half in the middle (cardiac region), but the abdomen is otherwise unmarked. The pale abdomen contrasts strongly with the dark cephalothorax. The abdomen is egg-shaped, pale yellow to light gray, and covered with short, semi-erect hairs. The forward-facing margin has three teeth, the rear-facing margin has two teeth. The jaws (chelicerae) are dark brown, stout, bowed outward, and hairy. The rear (posterior) row is curved rearward, and the eyes are equally spaced. The front (anterior) row is slightly curved forward. There are eight eyes in two rows of four each. The underside of the cephalothorax is reddish. There are indistinct black lines radiating out from the dorsal groove, but these cannot be seen against the dark background in most photos. A longitudinal depression in the middle (dorsal groove) is shallow but distinct. It is densely covered with tiny pits (punctures) and is hairless except in the front. The upper part (carapace) is thick, hard, dark reddish-brown, and shiny. ![]() The front part of the body (cephalothorax) is rather high and is rounded when viewed from the front, egg-shaped when viewed from above. It often enters houses in the fall.įemales are 5⁄ 16 ″ to ⅜ ″ (7.5 to 10 mm) in length and have a ⅜ ″ to ¾ ″ (10 to 20 mm) legspan. It is found in mixed deciduous and coniferous forests under loose bark, rolled up in leaves, in leaf litter, and under stones on fences and in human houses. ![]() The outlying records probably represent introductions into areas outside the species actual range. There are just a handful of records in the far south and in the west. It occurs in the United States from Maine to North Carolina, west to North Dakota and Texas, and in southern Ontario and Quebec Canada. Six new ground sac spider species of the family Phrurolithidae were collected from southern China: Otacilia ailan sp. Broad-faced sac spider is a common, small, ground-dwelling spider.
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