Review of the genus Hyrtanella (Ephemeroptera: Ephemerellidae) Author Jacobus, Luke M. Author Sartori, Michel text Zootaxa 2004 785 1 12 journal article 10.5281/zenodo.158566 ac5a8900-3ed1-4993-82a2-3de55f724002 1175­5326 158566 4D1175CD-8F0B-4969-9FDE-34C225D2E52C Hyrtanella christineae Allen and Edmunds Fig. 9 Diagnosis. Larvae ( Allen & Edmunds 1976: Figs. 1, 5, 6 ) have sharp genal and frontal spines that are upturned; the third segment of the labial palp relatively wide proximally; the mandibular base produced into a lateral protuberance; prominent, bluntly pointed projections on the upper surface of the forefemur; and prominent, paired, bluntly pointed projections on the thoracic and abdominal sterna. Larval variability. Allen and Edmunds (1976) described H. christineae as having a body length of 6.5–7.5 mm . However, we examined some final instar H. christineae specimens with a body length of up to 9.5 mm . One larva from the Liwagu River, north of Kundassan, has two more dorsal projections on the thorax than described by Allen and Edmunds (1976) . Discussion. The series of paratype larvae that we examined includes early, middle, and late instars. Material examined. Island of Borneo—MALAYSIA (east), Sabah : Liwagu R, N of Kundassan, 915m elev., S8e, 16–17/VIII/1972 , GF& CH Edmunds, two larvae [ PERC ]; Liwagu R, Liwagu Cave, SE of Headquarters, 1525m elev., S7e, 14–15/VIII/1972 , GF& CH Edmunds, 24 larvae ( paratypes ) [ PERC ]; same data, six larvae [ MZL , PERC ]; Silau­Silau Stream, N of Kinabalu NP Headquarters, 1585m elev., S3e, 11/VIII/1972 , GF& CH Edmunds, one larva [ PERC ].