The outline of the exoskeleton of Beckwithia is an inverted egg-shape with a stout sword-like tail spine or telson.
The dorsal shield covering the cephalothorax (or prosoma) is semi-circular, with the margin curving smoothly from the front to an acute, but rather small genal spine at the outside and the back.
The front and side margin is bordered by a flatted and undecorated zone of almost constant length/width.
The area within that band is densely covered in pustules.
Two distinctly raised eyes that are circular to oval are located at the outer rim of what could be compared to a trilobite glabella, with a strongly effaced outline and lobes.
The abdomen (or opisthosoma) consists of 11 segments (or possibly sometimes 10 or 12) perpendicular to the midline, that terminate to the sides in small spines that angle to the back.
Each segment carries a spine at midline too that is directed backward, a character that distinguishes Beckwithia from other Aglaspidid genera.
Only one species, Beckwithia typa, is currently recognized.
The outline of the exoskeleton of Beckwithia is an inverted egg-shape with a stout sword-like tail spine or telson. The dorsal shield covering the cephalothorax (or prosoma) is semi-circular, with the margin curving smoothly from the front to an acute, but rather small genal spine at the outside and the back. The front and side margin is bordered by a flatted and undecorated zone of almost constant length/width. The area within that band is densely covered in pustules. Two distinctly raised eyes that are circular to oval are located at the outer rim of what could be compared to a trilobite glabella, with a strongly effaced outline and lobes. The abdomen (or opisthosoma) consists of 11 segments (or possibly sometimes 10 or 12) perpendicular to the midline, that terminate to the sides in small spines that angle to the back. Each segment carries a spine at midline too that is directed backward, a character that distinguishes Beckwithia from other Aglaspidid genera. Only one species, Beckwithia typa, is currently recognized.
Beckwithia (arthropod)