TABLE 1 in Contribution to the genus Clypeocaenis Soldán, 1978 (Ephemeroptera: Caenidae) from Lao People's Democratic Republic with a key to Oriental species

TABLE 1. Comparative morphological characteristics of Clypeocaenis laosensis sp. nov. larvae and closely related species.
CharactersC. gayathriC. kaveriC. laosensis sp. nov.Length of pedicel: segment III2.5: 11.5: 11.5: 1Setae below molar6 setae7 setae4–5 setaeForefemur setae: inner margin; outer margin; transverse row4 long setae; stout and bifid setae; bifid setae4 long setae; both outer margin and transverse row with bifid setae3 long setae; simple setae; large broadly spatulate setaeCoxaeenlargednot enlargednot enlargedMid femur setae-shaped: outer margin; dorsal surfacestout setae; bifidboth with bifidboth with spatulateHind femur marginal setae-shapedstout setaestout bifid setaespatulate setaeNumber of denticles of the tarsal claws;9–106–83–5Fore and hind clawsshortened, strong bowednot shortened, slightly bowednot shortened, slightly bowedPosterior margin of abdominal tergum VIIspatulate, bifid and pinnate setaebifid setaestrongly denticulate, small spatulate setaeOperculate gill setae on posterior margin; basal medial ridge; microtrichia band on ventral surface of gillrow of short setae; 6 stout setae; not knownsmall bifid setae; 9 bifid setae; 2–3 irregular row of cluster 2–6 setaeshort broadly spatulate setae; 8–10 spatulate setae; without microtrichia bandHind margin of sternum IX and shagreen fieldnot knownbroadly round with 5–6 irregular rows of small denticlesslightly concave with 4 irregular rows of small denticlesEggsnot knownoval-shape; chorion smooth; epithema flat; micropyle short, mouth slightly broadened; spermguide invisibleoval-shape; chorion smooth; epithema cap-shaped; micropyle long, mouth not broadened; sperm-guide circularDistributionIndiaIndiaLao PDRReferencesMuthukatturaja et al. (2020)Balasubramanian & Muthukatturaja (2021); Srinivasan et al. (2023)Present study