Ganiagraecia Rentz, Su and Ueshima
Rentz, Dcf, Su, You Ning & Ueshima, Norihiro, 2021, Studies in Australian Tettigoniidae: New short-winged Agraeciini from Australia (Orthoptera: Tettigoniidae; Conocephalinae; Agraeciini), Zootaxa 5059 (2), pp. 1-72: 17-19
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|Ganiagraecia Rentz, Su and Ueshima|
Gen. et sp. nov.
Ganiagraecia Rentz, Su and Ueshima Gen. et sp. nov.
ANIC Number Gen. Nov. 9
Common name. Glasshouse Mountains Katydids
Type species: Ganiagraecia karwinia Rentz, Su & Ueshima , gen. et sp. nov., here designated.
Ganiagraecia Rentz & Su , gen. nov. is proposed for a single spectacular small species that seems restricted to the Glasshouse Mountains of southeast Queensland. The single species is light straw brown in overall colouration except that the caudal half of the pronotum is black and there is a broad longitudinal stripe extending from the pronotum to the tip of the abdomen. Males are macropterous, the tegmina slightly extending beyond the apex of the pronotum; females are wingless. Males have a simple cercus and the phallic complex lacks any trace of sclerotization. Females are slender and have an elongate, straight to feebly upcurved ovipositor that is not armed on either the dorsal or ventral margins.
Ganiagraecia Rentz & Su , Gen. nov. somewhat resembles Australiagraecia in its small size, straw-brown colour and its occurrence on or near the ground. It differs when critical morphological characters such as the habitus of living individuals, the armature of the thorax and the structure of the male cercus are considered.
Generic characters. Male/Female. Male. Head globular, not especially slanting. Antenna thin, about three times the length of the body; scape with a pronounced hook on internal margin, pedicel cylindrical, about ¾ length of scape. Eye ovoid but slightly laterally expanded, positioned high on head; fastigium of vertex narrow, not strongly projecting, with median sulcus. Fore tibia unarmed dorsally, ventral surface with 6 spines on each margin; femur armed ventrally with 3 minute teeth on anterior margin. Middle tibia armed dorsally with 2 slender, minute spines on posterior margin of dorsal surface, posterior margin unarmed, ventral surface armed on both margins with 6 spines; middle femur armed ventral on posterior margin with 0 or 2 minute teeth. Hind femur short, robust, armed on internal margin of ventral surface with 6 or 7 minute teeth; tibia armed on dorsal surface with 2 spurs, somewhat
9 Named for the Gani-Gabi indigenous peoples who have special reverence for the Glasshouse Mountains. subapical in position, ventral surface with 2 apical spurs. Genicular lobes of fore and middle femora unarmed; hind femur armed or not on internal lobe with a minute spine. Abdomen slender, tenth tergite with soft, membranous median portion; paraprocts not unusually produced. Female very slender, tenth tergite not greatly incised, supraanal plate triangular ( Fig. 9N View FIG ); subgenital plate broad than long, with a subapical notch ( Fig. 9O View FIG ). Ovipositor very elongate, much longer than hind femur ( Table 2).
Colour pale except for a dark median band on pronotum and dark, almost black, caudal half of pronotum; abdomen with a dark median patch beneath, but not extending beyond, tegmina; abdomen immaculate straw brown ( Figs 9 View FIG A-B). Female with broad median stripe extending from fastigium of vertex to tenth abdominal tergite, including supra-anal plate or not ( Fig. 9B View FIG ). Entire ventral surface straw brown. Entire surface of both sexes with many ovoid brown spots visible only under magnification. Tibial spines dark brown at base, median portion straw brown, apex slightly darker.
Ganiagraecia karwinia 0 Rentz, Su and Ueshima Gen. et sp. nov.
ANIC Number, Gen. Nov. 9, sp. 9
Common name. Grass Tree Katydid
Holotype male. ( In alcohol) 1. “ 25.26S 152.56E Mt. Tibrogargan (parking area), Glass House Mts. Qld. 15 August 1985 D. C. F. Rentz, R. Chiang, Stop 12”. 2. “collected as nymph, matured in laboratory 16.x.85”. 3. “ D. C. F. Rentz, Cytol. prep. 85-29”. 3. “Song recorded S-363”. 4. “ ANIC database #14008749” GoogleMaps . Holotype in alcohol in Australian National Insect Collection, Canberra. Paratypes. Queensland. 25 o 26’S 152 o 56’E Glass House Mts, Mt Tibrogargan , (parking area), 15.viii.1985 (DCF Rentz, R. Chiang, Stop 12, 10 males, collected as nymphs, matured in laboratory 16.x, 18.x, 20.x, 25.x.1985; DCF Rentz, Cytol. Prep. 85-18, -19, -20 -21, -27, -28; 5 females, same locality data and maturation dates, ANIC) GoogleMaps . 26 o 54’S 152 o 56’E Glass House Mts, Mt Ngungun (parking area), 9.viii.1985 (DCF Rentz, R. Chiang, Stop 4, 2 males, collected as nymphs, matured in laboratory 18.x, 20.x.1985; 13 females, collected as nymphs, matured in laboratory 18.x, 20.x.1985; Cytol prep. 85-17, ANIC) GoogleMaps .
Type locality. The type locality is a rather open woodland with many Grass Trees, Xanthorrhoea sp. , tall eucalypts and a dense undercover of herbs and grasses. The katydids were abundant in the lush weedy vegetation.
Measurements. Table 2
Differential diagnosis. Male. Antenna thin, about 5 times the length of body, annulate. Eye prominent, positioned high on head ( Figs 9A, B View FIG ). Cephalic margin of pronotum straight, caudal margin feebly concave. Prothorax with a prominent pair of thin spines; meso- and metathorax each bearing prominent tubercles ( Figs 9D, G View FIG ). Hind tibia armed dorsally on each side with many spines, packed close together, ventral surface with 6 or 7 very thin spines on each side. Cercus ( Figs 9I, J View FIG ) short, stout, with single internal tooth, apex acute, suggesting a minute tooth; subgenital plate with styles more robust than normal ( Fig. 9M View FIG ), median incision shallow, V-shaped.
Female. Differs from male in following. Thorax with a depression (glandular opening?) on the posterior portion of the mesothorax ( Fig. 9D View FIG ). Cercus distinctly curved inwards ( Fig. 9N View FIG ); subgenital plate about as broad as long, acutely tapering to apex, apex shallowly incised ( Fig. 9O View FIG ). Ovipositor longer than length of body, weakly upcurved, unarmed ( Table 2).
Colouration. Overall colouration straw brown with minute greyish brown speckles over entire dorsal portion of body; ventral surface of body creamish white ( Figs 9 View FIG A-B, D, G), subgenital plate light brown. Males with fastigium of vertex and median portion of pronotum with a black stripe ( Fig. 9A View FIG ), caudal half of pronotum black. Tegmina thin, colourless except for internal apical portion abdomen immediately beneath apex of tegmina dark ( Fig. 9A, K View FIG ). Female with head with brown stripe and with a thin white stripe in the middle ( Fig. 9C View FIG ); dark brown stripe extending from cephalic margin of pronotum to almost apex of abdomen ( Fig. 9B View FIG ), but not including tenth tergite.
Distribution. Known only from the Glasshouse Mts., Queensland (Map 4).
Habitat. Common in open woodland vegetated by tall eucalypts and Xanthorrhoea .
Seasonal occurrence. Adults found in mid spring.
Stridulatory file. File very distinctive ( Figs 20C, D View FIG ). Proximal portion with approximately 20 large teeth, decreasing in size and approximately 24-26 minute teeth on a raised swelling.
10 Karwin is an aboriginal word for Grass Trees, Xanthorrhoea species.
Karyotype. 2n male= 31 (30t +Xt) Fig. 22b A View FIG
Recognition. Very easily recognised by the combination of the yellow brown body colour with dark brown median dorsal stripe which contrasts with the distinct colour of the pronotum ( Fig. 9L View FIG ). Males have a simple cercus ( Figs 9I, J View FIG ) with a prominent internal tooth. Females bear a depression (glandular opening?) on the posterior portion of the mesothorax ( Fig. 9D View FIG ). The female cercus has a distinctive incurved tooth-like apex ( Fig. 9N View FIG ).
Discussion. This species appears to be endemic to the Glasshouse Mts. Its appearance and habitat preference is similar to that of Australiagraecia species but morphologically very different.
Departamento de Geologia, Universidad de Chile
Australian National Insect Collection
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