Tanystigma maddeni, Schmidt & New, 2008

Schmidt, Evan R. & New, Timothy R., 2008, The Psocoptera (Insecta) of Tasmania, Australia, Memoirs of Museum Victoria 65, pp. 71-152 : 143-145

Tanystigma maddeni sp. nov.

Figures 231–39

Material examined. Holotype: Tasmania, Freycinet National Park, Casuarina stricta , 17 Jan 1987. Eight nymphs and 6 paratypes: same data as holotype. Additional records: site 45, 2, 1, 5 June 87; site 52A, 1, 1 nymph, 7 June 87; site 88A, 1, 26 June 86; 1, 7 Aug 86; 6, 5, 8 nymphs, 21 Mar 87; 7, 3, 22 Apr 87; 3, 2, 11 May 87; 6

, 2, 1 nymph, 20 Feb 88; site 95A, 1, 22 Apr 87.

Description of male. Coloration (after ca 4 years in alcohol). Head buff with the following dark brown: patches dorsal to eyes, across back of vertex and along median epicranial suture, which is nearly black; band between eye and antennal socket; semicircular patch on frons ventral to anterior ocellus; epistomal suture and longitudinal parallel postclypeal striae; labrum and anteclypeus. Ocelli pale purple, interior borders black. Eyes purple-black. Antenna dark brown. Maxillary palps dark brown, apices of three basal segments buff. Fore wing (fig. 231) hyaline, veins dark brown. Hind wing (fig. 232) hyaline. Dorsa dark brown, scutella pale brown. Postnotum pale brown dorsally, dark brown ventrally.Pleura dark brown, sutural areas buff. Coxae and legs dark brown, trochanter buff. Abdomen with grey-brown longitudinal stripes, terminal segments dark brown.

Morphology. IO:D = 1.4. Eyes large, just below apex of vertex when viewed from side of head. Ocelli on raised tubercle. Antennae short (length 3.48mm), setose, f 10 and f 11 fused in terminal segment which narrows apically. Sensory placoids: 2 at base f 1, 1 at apices f 4, f 6 and f 10. Fore wing (fig. 231): very small scattered setae present on costa and vein of pterostigma, otherwise glabrous; first and second segments of cu 1a almost in straight line, and approximately equal in length; spur-vein not present. Hind wing (fig. 232) with few setae on margin between r 2+3 and r 4+5. Epiproct (fig. 233) with small rectangular flap at base, each side of this a lightly sclerotised projection. Paraproct (fig. 233) with round field of 36 trichobothria, distinct curved sclerotised bar and an apical sclerotised spur. Posterior margin of ninth tergite with two rounded lobes where the epiproct articulates, larger lateral projections adjacent to paraprocts (fig. 233). Hypandrium (fig. 234) apically bifid, terminating in two short blunt spines. Phallosome (fig.235)closedanteriorly,junctionnotsclerotised, posteriorly open with pair of double, sharp sclerotised spines.

Dimensions. B 2.8, FW 3.89, HW 2.95, F 0.69, T 1.54, t

1

0.411, t

2

0.190, rt 2.2:1, ct 22,0, f

1

0.798, f

2

0.656.

Description of female. Coloration (after ca 4 years in alcohol). As male, with following exceptions: stirrup mark on frons ventral to anterior ocellus; brown band extending from back of eye around ventral margin of eye; basal three segments of maxillary palp buff; ocelli buff. Fore wing (fig. 236) with complete transverse fascia.

Morphology. IO:D = 2.6. Antenna less setose than male, shorter (length 2.78mm). Terminal segment very small, apex rounded, sensory placoids: 2 at base f 1, 1 at apices f 2, f 4, f 6 and f 10. Setae on fore wing (fig. 236) margin more extensive than male, basal section of cu 1a longer than apical section. Epiproct (fig. 237): sclerotised arms directed anteriorly; apical third with scattered setae. Paraproct (fig. 237) with round field of 27 trichobothria, apical margin setose. Subgenital plate (fig. 238) median lobe apically setose, few scattered setae near apical margin on lobe; pigment band fused anteriorly, laterally broad; two narrow arms extending posteriorly not reaching apical margin; scattered setae on plate. Gonapophyses (fig. 239): ventral and dorsal valves with narrow spiculate apices, external valve with large apical posterior lobe and a dorsal lobe. Spermathecal plate (fig. 239).

Dimensions. B 3.2, FW 3.83, HW 2.83, F 0.67, T 1.44, t

1

0.363, t

2

0.197, rt 1.8:1, ct 14,0, f

1

0.711, f

2

0.498.

Remarks. This species is most similar to T. valvula found at Wilsons Promontory, Victoria, and T. bifurcatum , found in South Australia.All three species are similar in fore wing pigmentation, shape of the posterior apical lobe and smaller dorsal lobe of the external valve of the female gonapophyses, and the males possessing double-spined phallosomes. In female fore wing pigmentation T. maddeni , like T. bifurcatum , has a complete fascia, differing from the broken fascia of T. valvula . The anteriorly diverging pigmented arms of the subgenital plate are not fused medially in T. bifurcatum and T. valvula as they are in T. maddeni , and the small dorsal lobe of the external valve of the female gonapophyses is longer and more distinct in T. maddeni than in the other two species. The apically bifid hypandrium of T. maddeni is very similar to that of T. valvula , unlike the rounded median lobe of T. bifurcatum . The inner pair of spines on the phallosome is larger than the outer pair in T. bifurcatum , unlike T. valvula , in which the outer spines are larger, and T. maddeni , in which the spines are approximately equal in length. This species was collected from January to August mainly in dry coastal scrub from a few sites on the east coast.

Etymology. Named for Dr John Madden, in acknowledgement of his friendship, and his help to ERS during exploration in Tasmania.

Figures

Figures 231-239. Tanystigma maddeni. Male: 231, fore wing; 232, hind wing; 233, ninth tergite, epiproct and paraproct; 234, hypandrium; 235, phallosome. Figures 231, 232 and 234 and 235 to common scales. Female: 236, fore wing; 237, epiproct and paraproct; 238, subgenital plate; 239, gonapophyses and spermathecal plate. Figures 237-239 to common scale.