Abstract
The imagos and nymphs of Siphlonurus davidi (Navás, 1932) are described for the first time. The adult has colourful wings and cross veins, the MP is forked asymmetrically at its base, a long cubital area is present with more intercalaries, and it has a relatively simpler penis and larger hindwings compared to its congeners. The venation and genitalia show that it is a plesiomorphic species in the genus. A key to the Asian species of Siphlonurus with coloured wings is provided in conclusion.
Highlights
The species Siphlonurus davidi (Navás, 1932), which was based on a single male subimago, was re-described by Sartori and Peters in 2004
Just as Sartori and Peters (2004) pointed out, S. davidi is close to the S. palaearcticus (Tshernova, 1930) and S. binotatus (Eaton, 1892) because all of these three species have colourful wings in imagos
Siphlonurus binotatus, on the other hand, has obvious tracheae-like markings on the abdomen and obvious dark spots near the lateral margins of terga, which are not found in S. davidi or S. palaearcticus
Summary
The species Siphlonurus davidi (Navás, 1932), which was based on a single male subimago, was re-described by Sartori and Peters in 2004. Thorax: coxa and trochanter of foreleg deeply pigmented with reddish brown in colour, and apical half of femora, tibia and tarsus brown but basal half of each is pale (Fig. 3A); length ratio of femora, tibia and tarsus of foreleg = 2: 1: 3.7, five segments of fore-tarsus progressively shorter from distally; two claws similar, acute, hooked (Fig. 3E); mid- and hind-legs apparently vestigial in the single male imago (this may be due to damaged or broken legs in the previous life stage of this specimen) but normal in females and male sub-imagos (Fig. 3A, C).
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call