Siphlonurus davidi Navas 1932
Creators: name: Sartori, Michel
name: Peters, Janice G.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Siphlonuridae
Siphlonurus
Siphlonurus davidi

description: Siphlonurus davidi (Navás, 1932)
(Figures 1–7)
Siphluriscus? davidi Navás, 1932: 929.
Siphlonurus davidi; Zhou & Peters, 2003: 346.
Material. Type of Siphluriscus? davidi Navás in Paris Museum, with following 4 labels. 1) Museum Paris/ Se­Tchouen/A. David 1875; 2) 6/9 75 [not in handwriting of Navás, probably that of A. David and probably date of collection 6­IX­1875]; 3) Siphluriscus? Davidi Nav. / Navas S. J. det [handwriting by Navás]; 4) TYPE [in red]. "Se­Tchouen" is an archaic spelling for Sichuan Province, China, according to Zhou (Zhou and Peters 2003).
Measurements. Given by Navás 1932: body 17 mm, forewing 20 mm, hind wing 9.5 mm; hind wing width estimated from torn wing at 7.2 mm.
Head. Brownish, mostly obscured by compound eyes that meet medially. Thorax. Pro­ and mesothorax brown with distinct median transverse suture. Mesonotal suture turned backwards; posterior margin of meso­ and metathorax carinated. Wings [left forewing damaged medially and posteriorly, right forewing broken; left hind wing mostly intact; right hind wing intact but folded]. Forewing length a little more than 1/3 width; MA fork distal to middle of wing and MP2 attached basally to MP1 at cross vein, but a small tear in this area and overlapping veins on both wings make exact vein connection difficult to interpret; CuA field with numerous intercalaries attaching vein to margin; CuP strongly curved; cross veins as in Figs. 1, 6. Hind wing broad (width approximately ¾ length), with MA fork distal and MP fork basal to middle of wing, forks symmetrical; CuA, CuP, and visible anal veins straight, anal area expanded but details not visible (Figs. 2,6). Distinct, dark blackish clouds surrounding cross veins in costal and subcostal cells of forewing; a similar color pattern more extensive in hind wing irregularly extending onto membrane across middle of wing and distally (Figs. 1 –2,6). Legs. Foreleg segments declining in length from femur (longest) to tibia, tarsal segment 1, tarsal segments 2–3 subequal, and tarsal segments 4–5 subequal (Fig. 6); foreclaws similar, hooked with small opposing hook. Abdomen. Base color of terga a pale brown; posterior half of terga 2–5 dark blackish brown, paler anteriorly; terga 6–8 with submedian blackish­brown lines (Figs. 4,6). Genitalia. Styliger plate shallowly concave; forceps with three visible segments and indication of a partially fused 4th basal segment within the subimaginal cuticle; penes short, without visible detail within subimaginal cuticle (Figs. 3,7). Caudal filaments. Right cercus present (left broken and missing), short, about equal to length of abdomen; a very short terminal filament present (length less than that of male forceps) (Figs. 6–7).
description: Published as part of Sartori, Michel & Peters, Janice G., 2004, Redescription of the type of Siphlonurus davidi (Navás, 1932) (Ephemeroptera: Siphlonuridae), pp. 1-6 in Zootaxa 469 on page 2, DOI: 10.5281/zenodo.157778