Dendrobia Hemp & Ingrisch,

Hemp, Claudia, Ingrisch, Sigfrid & Heller, Klaus-Gerhard, 2017, A new genus and other new species of Agraeciini from the Eastern Arc Mountains, East Africa (Orthoptera: Tettigoniidae; Conocephalinae; Agraeciini), Zootaxa 4311 (1), pp. 1-22: 2-4

publication ID

https://doi.org/10.11646/zootaxa.4311.1.1

publication LSID

lsid:zoobank.org:pub:C0262EB9-4220-495D-B001-5456DA322FC7

persistent identifier

http://treatment.plazi.org/id/7178E875-FF81-FFAE-1BC4-F96615A0FCE8

treatment provided by

Plazi

scientific name

Dendrobia Hemp & Ingrisch
status

n. gen.

Dendrobia Hemp & Ingrisch  n. gen.

urn:lsid: Orthoptera  .speciesfile.org:TaxonName:497463

Type species: Dendrobia amanienis  n. sp.

Included species: Dendrobia amanienis  n. sp., Dendrobia octopunctata  n. sp., Dendrobia  sp. (Nguru Mts., known only from females).

Description. Fastigium verticis blunt conical to almost rectangular, shorter than scapus ( Fig. 1View FIGURE 1). Scapus without spine. Frons broad with shiny surface. Antennae thick, longer than insect. Pronotum shield-like with shiny smooth surface. Lateral lobes narrow evenly running into elongated broadly rounded posterior margin. A varying number of black dots or patches on anterior part of pronotum arranged in pairs. Tegmina and wings somewhat reduced, nearly covering abdomen. Hind wings hyaline, as long as tegmina. Pro-, meso- and metasterna unarmed, more than 3 times as broad as long with extended lappet-like anterior corners ( Fig. 15View FIGURE 15 B). Fore coxa with well developed long and curved spine. Fore and mid femora with few stout spines on ventro-external margin only, hind femora with numerous spines on ventro-external margin, with 1–2 stout spines on ventro-internal margin near knees. Genicular lobes of all femora with a pair of acute stout spines. Tenth abdominal tergite in male broad, undifferentiated. Subgenital plate undifferentiated, broad with short styli.

Male phallus. As in both other genera of East African Agraeciini  (compare e.g. Hemp 2013a), the phallus is provided with three pairs of sclerites or semi-sclerotized modifications: 1) a pair of baso-central, distinct sclerites, which are rather simple, elongate or roughly triangular with prolonged tip, stiff and colourless, subhyaline or white, (2) latero-apical extensions that are connected to but not fully fused with the basal sclerites, either sclerotised and of complex structure ( Afroanthracites  ), or flexible, semi-sclerotised, and their surface appearing streaky from fine hairs ( Afroagraecia  ) or flexible and with a rough surface and covered with very fine, delicate hairs ( Dendrobia  ); and (3) a pair of lateral sclerites at the lateral areas of the epiphallus that are convex ( Afroanthracites  ), band-shaped and wavy ( Dendrobia  ) or elongate stiff ( Afroagraecia  ).

Females with long and stout ovipositor, moderately up-curved, valves shiny and smooth ( Fig. 2View FIGURE 2).

Diagnosis. The new genus Dendrobia  differs from the other two East African genera of Agraeciini  by the blunt conical to almost rectangular fastigium verticis with indentated apex while it is acute to conical in Afroanthracites  and Afroagraecia  . The tegmina in the new genus are very broad, leaf-like, hiding and barely surpassing the tip of abdomen while Afroanthracites  species are micropterous and Afroagraecia  includes micropterous to fully winged species with brown to tawny tegmina with parallel-sided margins. The genicular lobes of the fore and mid femora carry a pair of stout, acute spines in Dendrobia  while they are smoothly rounded in Afroanthracites  and Afroagraecia  . The hind genicular lobes of both Dendrobia  and Afroanthracites  are spined, but those of Afroanthracites  are shorter and less acute than those of Dendrobia  .