Notacanthella quadrata (Kluge & Zhou, 2004)

Auychinda, Chonlakran, Sartori, Michel & Boonsoong, Boonsatien, 2020, Review of Notacanthella Jacobus & McCafferty, 2008 (Ephemeroptera: Ephemerellidae) in Thailand, with the redescription of Notacanthella commodema (Allen, 1971), Zootaxa 4731 (3), pp. 414-424 : 420-421

Notacanthella quadrata (Kluge and Zhou [in Kluge, Zhou, Jacobus and McCafferty], 2004)

Figures 6 , 7

Ephemerella quadrata: Kluge, 2004: 306 , fig 92: E–G;

Ephemerella quadrata: Kluge et al., 2004: 148 , figs 1–9;

Notacanthella quadrata: Jacobus and McCafferty, 2008: 236 .

Diagnosis. Head capsule quadrate, with only a pair of occipital tubercles; genae flattened and enlarged, projecting anteriorly; maxillary canines with lateral serrations; thorax with no tubercles but with acute anterolateral projections on pronotum that differ from other Notacanthella . Abdomen with well-developed, pointed tubercles and acute posterolateral projections ( Figs 6 A–B).

Eggs (dissected from final larval instar): length 191.33 µm, width 90 µm. Ovoid with one small polar cap; chorion with reticulations, several lateral attachment structures in subpolar areas ( Fig. 7A ); micropyles tagenoform- type on equatorial area ( Fig. 7B ). Knob-terminated coiled thread (KCT) of attachment structure formed by several microfilaments ( Fig. 7C ).

Male adult: Unknown.

Material examined. THAILAND, Chiang Mai province, Mae Ya waterfall, 18°26’23.6”N 98°35’52.8”E, altitude 585 m, 11.III.2016, B. Boonsoong leg., 1 larva [ ZMKU] ; Nan province, Bo Kluea, Mae Mang , 19°09’09.4”N 101°09’16.4”E, altitude 669 m, 26.XI.2019, C. Auychinda leg. 1 larva [ ZMKU] .

Figures

FIGURE 6. Notacanthella quadrata, larva: (A) dorsal habitus; (B) ventral view of head capsule. Scale = 1 mm.

FIGURE 7. Notacanthella quadrata: (A) overview of egg; (B) micropyle; (C) arrangement of attachment structures (MiP=micropyle; KCT=knob terminated coiled thread).