The spider is also carved with lines radiating from its neck, creating a web-like appearance.
The web symbolizes hunting nets, a sign of human progress and prosperity, Ignacio Alva said. Traps set with nets caught more prey than spear hunting, he added.
The spider figure also had political significance, Ignacio Alva said. "Any emergent political group would have to be associated with this god."
Richard Burger, an expert on the Chavin culture that followed the Cupisnique, first identified the spider deity in stone bowls found at the Limón Carro site.
The importance of spiders owed partly to their connection with life-giving rain, he said.
"They were associated with divination of rainfall because spiders come out before rain," said Burger, an archaeologist at Yale University who was not involved with the Lambayeque excavation.
The spider deity was also associated with textiles, hunting, war, and power, Burger added. "There is an image of spider deities holding nets filled with decapitated human heads, so there was an analogy with successful warriors and claims of power."
(Related: 80 Ancient 'Cloud Warrior' Skeletons Found in Peru Fort" [September 26, 2007].)
The Chavin people who came after the Cupisnique built a temple adjacent to Collud, Zarpan, about three hundred years later.
The new temple finds may help explain a cultural shift from Cupisnique to Chavin, said team leader Walter Alva.
"Cupisnique and Chavin shared the same gods and the same architectural and artistic forms, showing intense religious interaction among the cultures of the [Early] Formative Period from the north coast to the Andes and down to the central Andes," he said.
The temples are similar in size, roughly 1,640 feet (500 meters) long and 984 feet (300 meters) wide.
Collud has a monumental clay staircase with 25 steps, perhaps the inspiration for the later Zarpan temple's clay staircase, Ignacio Alva said.
The Chavin did not build clay structures in the Andes, where significant rainfall threatened their stability. (See Andes photos.)
But clay structures were typical of the Cupisnique culture, which developed on the arid north coast.
It's unknown how the two cultures interacted, if at all, experts say.
"This place is the testimony of two cultures overlapping and will help clarify what is Cupisnique and what is Chavin," Walter Alva said.
Pieces of structures found at the site may lead to the discovery of a fourth or fifth temple, according to the team.
Yale's Burger wonders if the ongoing excavations will demonstrate what happened to the site as north-coast cultures declined between 900 and 700 B.C.
"The far north coast in earlier times was very important, but it has been largely ignored because there's so little information," Burger said. "This could change that."
"Does this center continue to be important or does it collapse?" he asked. "Does the Cupisnique continue to flourish independently or in close contact with the Chavin?"
Ignacio Alva predicts the site will show that the temple complex transformed itself, but did not collapse.
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