Studies on the Australian stick insects (Phasmida), including a checklist of species and bibliography Author Brock, Paul D. Author Hasenpusch, Jack text Zootaxa 2007 2007-08-31 1570 1 1 81 https://biotaxa.org/Zootaxa/article/view/zootaxa.1570.1.1 journal article 10.11646/zootaxa.1570.1.1 1175­5334 5096400 5A58505D-6A85-45E8-8783-5666A3944701 Davidrentzia Brock & Hasenpusch , gen. n. Type species. Davidrentzia valida Brock & Hasenpusch sp. nov. , here designated. Characteristics of the genus Robust medium-sized phasmid, body length c. 97 mm in females, male not yet known. Head large, rather broad (but longer than wide), with series of granules present. Eyes small. Antennae with 24 segments ( type species), basal segment broadened, 2 nd segment longer also than next. Final segment 2.5 times longer than previous segment. Thorax broad, rugged appearance, heavily granulated / tuberculated, includes laterally. Pronotum significantly shorter than head, mesonotum nearly three times length of pronotum, but metanotum almost three times shorter than mesonotum. Vestigial wings only present. The abdomen is broad, with several longitudinal ridges, End of anal segment slightly emarginated in centre. Operculum large, boat-shaped, extruding by length of anal segment. Cerci broad, tapering to tip. The legs are robust, with a pair of short apical spines on femora. Otherwise the femora and tibiae have short spines, hardly noticeable on the tibiae. Notes: From the general appearance, Davidrentzia looks closest to Graeffea (rather than the larger, winged Megacrania ), but is easily distinguished, as follows: TABLE 14 Differences between Davidrentzia and Graeffea .

Characteristic	Davidrentzia	Graeffea
General appearance	Broad, very robust appearance	Fairly broad, not particularly robust
Head	Large and very broad	Fairly large and broad
Thorax	Heavily granulated / tuberculated	Plain or sparsely granulated
Wings	Vestigial only	Shortened fore and hind wings
Operculum	Extending well beyond end of anal segment	About reaching / just exceeding end of anal segment

In Davidrentzia the operculum extends well beyond the abdomen, unlike other genera in the subfamily. Species included Davidrentzia valida Brock & Hasenpusch sp. nov. Derivation of name Named after the collector and well known specialist in orthopteroid insects, David C. F. Rentz (born 1942).