Arp 316 is in the Galaxy Groups class.  The Atlas note is “edge-on spiral shows signs of interaction”.  All three large galaxies make up Arp 316.  Within Arp 316, the integral sign spiral is NGC 3187, the nearly edge-on spiral is NGC 3190, and the E-like galaxy at the NE apex of the triangle is NGC 3193.  The dust lane in NGC 3190 is a strong one.  Both 3190 and 3187 show obvious evidence of interaction.  On close inspection, this image shows a wide band of material connecting 3193 and 3190, and a narrower U-shaped band from the SW end of 3187 to the S side of 3190.