Cincticostella femorata (Tshernova, 1972)

(Figs 113–118)

Ephemerella sp. TEA: Gose 1969: 132 –135 (named C. boja by Allen 1975)

Ephemerella (Cincticostella) boja Allen, 1975: 18 –19 (syn. by Jacobus et al. 2005)

Asiatella femorata Tshernova, 1972: 611 –612 (genus name preoccupied by Asiatella Repina, 1964 (Arthropoda: Trilobita))

Diagnosis. Larvae of C. femorata can be distinguished from other representatives of the insolta complex by the following combination of characters: (i) head with large genae (Figs 113, 114); (ii) body, especially mid- and hindfemora, significantly flattened (Figs 113, 117, 118); (iii) projections of pronotum large, directed forward (Figs 113, 115); (iv) projections of mesothorax not notched (Figs 113, 115); (v) inner margin of forefemur without large projections or chalazae (only occasionally with one or two small chalazae) (Fig. 116); (vi) outer margins of mid- and hindfemora strongly serrated (Figs 113, 117, 118); (vii) inner margins of mid- and hindfemora without serration (Figs 117, 118); (viii) outer margin of middle femur with well-developed apical projection (Fig. 117); (ix) paired abdominal tergal projections without bifurcation.

Distribution. Northern parts of Vietnam (Tshernova 1972) and Thailand (Gose 1969, Jacobus et al. 2005, Jacobus & McCafferty 2008, new data), and southern part of mainland China (Xie et al. 2009) (Fig. 153).

Habitat. Cold, st flowing streams and rivers. Larvae appear to prefer pebble, detritus, leaf litter and roots as substrate.

Remarks. The larva of this species was described in detail by Gose (1969) and Tshernova (1972). We illustrate the main distinguishing characters of the species (Figs 113–118) for comparative purposes.

Material examined. THAILAND: 1 larva (slide number 622), Chiang Mai Province, Chom Thong District, river flows at the Siriphum Botanic garden, above 1.5 km the Botanical garden, 18.543444 N, 98.501811 E, h ~ 1670 m a.s.l., 19-XI-2009, D.M. Palatov and M.V. Chertoprud—IN Thai9Cinfem; 1 larva, Chiang Mai Province, Chom Thong District, stream—main source of the Klang Phat River, 18.577542 N, 98.527056 E, h ~ 1370 m a.s.l., 18-XI-2009, D.M. Palatov D.M. and M.V. Chertoprud—IN Thai 10 Cinfem.