How are the eight eyes of the Yellow Sac Spider arranged across the front of the cephalothorax?

Answer

Arranged in two rows of four across the front, with the anterior median eyes separated by a greater distance.

Spider identification relies heavily on the specific pattern of their ocular arrangement. Yellow Sac Spiders possess a total of eight eyes, which are organized into two distinct rows, with four eyes present in each row across the anterior portion of the cephalothorax. The arrangement within these rows is particular: the two central front eyes, known as the anterior median eyes, are positioned farther apart from each other than they are from the adjacent anterior lateral eyes (the outer eyes in that front row). Visually, this configuration can be conceptualized as forming a slightly elongated trapezoid shape, which helps distinguish them from many other household spiders that possess significantly different eye layouts.

How are the eight eyes of the Yellow Sac Spider arranged across the front of the cephalothorax?

Related Questions

What is the typical body length range for adult female Yellow Sac Spiders belonging to the genus Cheiracanthium?What coloration feature on the mouthparts is a valuable identification marker for the Yellow Sac Spider?How are the eight eyes of the Yellow Sac Spider arranged across the front of the cephalothorax?What is the typical form and function of the silk structure spun by Yellow Sac Spiders?What characteristic coloration fact about the body generally indicates a spider is NOT a Cheiracanthium species?In mature male Yellow Sac Spiders, what appendages become specialized and often appear enlarged or club-like?What key difference in abdominal marking separates *Cheiracanthium mildei* from *Cheiracanthium inclusum*?What type of visual pattern is generally absent or extremely subtle on the dorsal abdomen of *Cheiracanthium inclusum*?What characteristic contributes to the agile movement of the Yellow Sac Spider relative to its body size?How large is the day retreat typically spun by a mature female Yellow Sac Spider?
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