About Phanogomphus cavillaris (Needham, 1902)
Overall, Phanogomphus cavillaris, commonly called the sandhill clubtail, shares very similar yellow and dark patterned coloration with most other phanogomphids. Its general body patterning and habitat preference are nearly identical to that of the closely related cypress clubtail, Phanogomphus minutus. This species can be distinguished from P. minutus by consistent morphological differences: P. cavillaris has a straight occiput line (the ridge between the eyes at the back of the head) and a dark band across its face, while P. minutus has a slightly curved occiput line that is lobed along the sides and an entirely pale yellowish face. While additional morphological and microanatomical differences exist between the two species, the shape of the occiput line is the most useful identifying feature for field work.
