Compsoneuria Eaton 1881
Creators: name: Sartori, Michel
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Heptageniidae
Compsoneuria

description: Compsoneuria Eaton, 1881
Compsoneuria Eaton, 1881, Ent. Mon. Mag. 18: p.23
Compsoneuria Eaton, 1885, Trans. Linn. Soc. Lond. 2: p. 275, plates 23 and 24 (42)
Compsoneuria Ulmer, 1924, Treubia 6: p. 86, figures 53A, 55–58 (pro parte non female in figures 53B and 54)
Compsoneuria Ulmer 1939, Arch Hydrobiol. Suppl. 16: p. 562 (pro parte)
nec Compsoneuria Braasch & Soldán 1986 Reichenbachia 24: p. 59 et auct seq.
Diagnosis. Imago. Forewing (Figs 1, 22) crossveins generally reduced in number, comprised between 45 –65, trimmed with violet or brown especially in the costal and subcostal fields. Costal and subcostal fields with few crossveins (<12), at least two rows of crossveins in the radial field and one crossing the radial-median fields. Male foreleg with first tarsal segment reduced in length, ca 4 times shorter than the second one (Figs 3, 4). Styliger plate straight or slightly convex, last two segments of the gonopods subequal in length (Figs 6, 23). Male genitalia with inner median titillators, penis lobes with apical, subapical and basal spines; lateral sclerite broad and basal sclerite weakly developed (Figs 7, 24).
Nymph. Head unicolorous, not thickened, with sometimes lateral markings but without whitish spots on the fore margin (Figs 79–80). Distal dentisetae on maxillae with inner one entire and outer one fringed (Figs 43–44). Scattered setae on the maxillae fimbriate (Figs 45–46). Labial glossae rhomboid with outer margin convex (Fig. 12). Supracoxal spurs present but rounded or bluntly developed (Figs 79–80). Spines on the upper face of femora rounded or truncate (Figs 14, 62). Inner margin of femora without long and thin setae (Figs 13, 61). Gills generally tinted with greyish-purple (Figs 16-18, 79–80). All gills with fibrillous and plate like structures, except gill VII only plate-like. Hind tibiae with two rows of fine setae (Figs 13, 15, 61). Tarsal claw with 3-4 subapical teeth. Caudal filaments with whorls of spine like setae on each segment, without long and thin setae.
Eggs. Chorion covered by polygonal ridges; one pole with KCT’s larger than those in equatorial area; micropyle with double margin (Figs 20–21).
Species included.
Compsoneuria spectabilis Eaton, 1881 (imagos, nymphs): Java, Sumatra
Compsoneuria lieftincki (Ulmer, 1939) (imagos): Java
Discussion. At the imaginal stage, the combination of the forewing crossveins, the male foretarsi proportions and genitalia will distinguish the genus from all its relatives. At the nymphal stage, Compsoneuria is distinguished from its relatives by the shape of the supracoxal spurs, by the presence of two rows of setae on the hind tibiae, by the shape of the outer distal dentiseta, and by the shape and coloration of the gills. Using the key provided by Webb & McCafferty (2008), Compsoneuria will key out at couplet 15 leading to “ Afronurus in part”.
description: Published as part of Sartori, Michel, 2014, The concept of Compsoneuria Eaton, 1881 revisited in light of historical and new material from the Sunda Islands (Ephemeroptera: Heptageniidae: Ecdyonurinae), pp. 1-32 in Zootaxa 3835 (1) on page 4, DOI: 10.11646/zootaxa.3835.1.1, http://zenodo.org/record/286701