122,923 research outputs found
Yelirella nomen novum for Rileyella Spratt, 2003 (Pentastomida: Cephalobaenida), a junior homonym of Rileyella Townsend, 1909 (Diptera: Tachinidae)
No full textYelirella nomen novum is proposed as a replacement name for Rileyella Spratt, 2003 (Pentastomida: Cephalobaenida), which is a junior homonym of Rileyella Townsend, 1909 (Diptera: Tachinidae), resulting in the new combination Yelirella petauri (Spratt, 2003) n. comb
Cydistomyia obscurus Mackerras & Spratt 2008, sp. nov.
No full text<i>Cydistomyia obscurus</i> Mackerras & Spratt, sp. nov. <p>(Fig. 24)</p> <p> <i>Type material</i>. Holotype female, Qld, Kauri Creek, Lamb Range, 1190 m, rainforest, Nov. 1998, C.J. Burwell (QM # T144372). Paratype male, same data as for holotype (QM).</p> <p> <b>Diagnosis</b>. A medium sized 14–15 mm brown species with clear wings except for brown suffusion in costal cell and brown stigma in female. Distinguished from <i>C. exemplum, C. sabulosus</i> and <i>C. monteithi</i> by larger size, wider frons, oval shape of callus with short narrow extension and elongate antennal flagellum. Further distinguished from <i>C. exemplum</i> by absence of herringbone pattern on thorax at 15–20X magnification.</p> <p> <b>Female. Head.</b> Eyes (relaxed) red-brown, bare. Frons slightly divergent, wide, index 3.7, tomentum dark reddish brown, no hairs visible; vertex hollow, vertical triangle and ocellar tubercle not observed. Callus shiny dark brown, raised, not full width of frons at base, with narrow extension reaching to middle of frons. Subcallus dark reddish grey, no hairs; face similar; parafacials black (possibly due to killing in amyl acetate), with very short black hairs; beard white. Scape and pedicel brown with long black hairs; basal plate narrow, brownish orange, with small dorsal tooth with short black hairs, contrasting with black style. Palpi plump, pale brown, with black hairs, especially long basally.</p> <p> <b>Thorax.</b> Scutum and scutellum dark brown, with appressed short white hairs, longer on posterior margin of scutum, absent from margin of scutellum.</p> <p> <b>Legs.</b> Legs brown, femora with mixed black and white hairs, remainder of legs with black hairs.</p> <p> <b>Wings.</b> Clear except for brown suffusion in costal cell and brown stigma.</p> <p> <b>Abdomen.</b> Abdomen with narrow pale bands with fine white hairs on apical margins of tergites, fine black hairs elsewhere, tergite 7 with long black hairs. Venter similar.</p> <p> <b>Male</b>. Similar but paler, abdomen with longer brownish orange hairs over all tergites and on posterior margins of scutum and scutellum. Venter with longer white hairs over all sternites. Eyes bare, upper facets enlarged. Ocellar tubercle not visible. Subcallus greyish brown; parafacials and face grey with mixed black and white hairs. Palpi cream, with long black hairs, second segment plump tapering to gently rounded tip. Wings light brown, costal and subcostal cells suffused with brown, stigma brown.</p> <p> <b>Distribution.</b> Known only from type locality SW of Gordonvale and E of Atherton, N QLD.</p> <p> <b>Etymology</b>. The specific epithet derives from the Latin for undistinguished and refers to the generally plain appearance of the species.</p>Published as part of <i>Mackerras, I. M., Spratt, D. M. & Yeates, D. K., 2008, Revision of the horse fly genera Lissimas and Cydistomyia (Diptera: Tabanidae: Diachlorini) of Australia, pp. 1-80 in Zootaxa 1886 (1)</i> on page 34, DOI: 10.11646/zootaxa.1886.1.1, <a href="http://zenodo.org/record/5133810">http://zenodo.org/record/5133810</a>
Gongylonema macropodum Spratt 2023, sp. nov.
No full textGongylonema macropodum sp. nov. Type specimens. Holotype ♁, AHC 49235, allotype ♀, AHC 49236, 4 ♁♁ paratypes, AHC 49237, 3 ♁♁ paratypes, AHC 49238, 3 ♀♀ paratypes, AHC 49239, 2 ♀♀ paratypes, AHC 49240. Type locality. Townsville, Qld. Type host. Notamacropus agilis (Gould) (Marsupialia: Macropodidae) (agile wallaby). Site of infection. Oesophageal and stomach mucosa. Additional host. Macropus giganteus Shaw (Marsupialia: Macropodidae) (eastern grey kangaroo). Material examined. Qld: from Notamacropus agilis, types; Hervey’s Range, Townsville 2 ♁♁ (AHC 7770), 2 ♁♁ (AHC 7792); Ingham, 1 ♁ (AHC 19896); Tully, 1 ♁, anterior end (AHC 7787); Cromarty (south of Townsville) 1 ♀ in 4 fragments (QM GL11304). From Macropus giganteus stomach Rockhampton, 3 ♀♀ (AHC 11060). Etymology. The specific name is derived from the family name, Macropodidae, of the wallaby and kangaroo hosts of the nematode parasite. Description (Fig. 5 A–I) General: Nematodes with marked sexual dimorphism, cuticular bosses present on anterior end, prominent transverse cuticular striae present. Cephalic end with peri-buccal ring, buccal capsule present. Oral opening dorsoventrally elongated, 2 cuticular formations at outer margins of dorso-ventral axis and extending over opening, 6 small internal papilliform, labial projections, 3 on each side on inside rim of buccal capsule, 2 pairs of internal papillae, 2 pairs of cephalic papillae and 2 large lateral amphids. Deirids situated anteriorly near origin of lateral alae. Oesophagus long, divided into anterior muscular and posterior glandular regions. Male (holotype in italics, 7 paratypes mean and range in parentheses: Total length 32, 33 (31–36) mm. Maximum width 239, 231 (212–265). Cuticular bosses initially on all surfaces, constrained to lateral surfaces from about junction of muscular and glandular oesophagus, extending 868, 480 (385–768) from cephalic extremity. Buccal capsule 42, 40 (35–42) long, 21, 23 (15–27) wide. Deirids immediately anterior to lateral alae, 156, 155 (129–177) from anterior end. Lateral alae present, continue entire body length, widening to form asymmetric caudal alae, right wider than left and extending to tail tip. Nerve ring 282, 280 (260–302), excretory pore 480, 498 (416–600). Muscular oesophagus 663, 641 (520–824) long, glandular oesophagus 5697, 6134 (4823–7685) long. Spicules unequal, markedly different in length, right spicule 187, 172 (146–187) long, 27, 38 (31–42) maximum width; left spicule 13780 13391 (12798–13177) long, finely striated; portion of gubernaculum accommodating left spicule 125, 127 (125–130) long, portion accommodating right spicule 83, 86 (83–94) long. Tail twisted, approximately 260, 240 (221–260) long, with 6 pairs of pedunculated pre-cloacal and 3 pairs of pedunculated post-cloacal papillae with 1 or 2 pairs of smaller sessile post-cloacal papillae, variably distributed near caudal extremity. Tail in AHC 7792 not twisted and two pairs minute papillae visible on tail tip, not detectable in male tails which are normally twisted. Female (allotype in italics, 5 paratypes mean and range in parentheses: Total length 78, 55 (45–80) mm. Maximum width 342, 296 (239–371) at posterior end. Dense cuticular bosses on all surfaces initially, confined to lateral surfaces from about junction of muscular and glandular oesophagus, extending 1299, 1252 (1066–1510) from cephalic extremity. Buccal capsule 52 47 (46–50) long, 21, 23 (21–24) wide. Deirids anterior to origin of lateral alae, 208, 176 (156–214) from anterior end. Nerve ring 370, 355 (274–437), excretory pore 645, 585 (532– 634) from anterior end. Muscular oesophagus 1092, 768 (718–832), glandular oesophagus 8848 7587 (6599–8957) long. Vulva 9164, 6900 (5062–8848) from posterior extremity. Tail 335 325 (292–370) long. Larvated eggs 52, 49 (42–52) long, 33, 30 (22–33) wide, with thick smooth shells. Female: (GL 11304) Length> 64 mm (tail end missing). Maximum width 344. Cuticular bosses over entire body anteriorly, confined to right lateral subsequently, extending 901. Buccal capsule 42 long, 18 wide. Deirids anterior to broad lateral alae, 177 from cephalic end. Nerve ring 395, excretory pore 594 from cephalic end. Muscular oesophagus 795, glandular oesophagus 8800 long. Vulva not observed. Eggs 52x37, shell thick 8, unfertilised. Remarks. Specimens of G. macropodum sp. nov. from kangaroos and wallabies were all collected from the mucosa/submucosa of oesophagus and/or stomach. They are distinguished from G. alecturae by the different morphology of the right spicule including its greater length and width, shorter length of left spicule, the greater distance bosses extend beyond the cephalic extremity particularly in females, the greater length of muscular and glandular oesophagus and of the tail in both sexes, and the much shorter distance of the vulva from the tip of the tail in females from N. agilis but not M. giganteus. A single male specimen from N. agilis, not twisted in the caudal region, bore 2 pairs of minute terminal papillae, a feature able to be observed rarely on account of the normally twisted tails of males. Apparently, Mawson (1971) was not aware of four fragments of a female specimen held in the Queensland Museum (GL11304) and collected by J.W. Fielding 25 July 1913 from the oesophagus of Notamacropus agilis (as Macropus agilis) from Cromarty (south of Townsville), Qld. The label reads Gongylonema cf. pulchrum Molin, 1857. Measurements are similar to G. alecturae and G. macropodum sp. nov. which were unknown at the time. In the absence of a male I have determined the specimen as Gongylonema cf. macropodum. If correct, it would indicate that the species has been known from macropodids for more than a century.Published as part of Spratt, David M., 2023, Redescription of species of Gongylonema Molin, 1857 (Nematoda: Spiruroidea Gongylonematidae) parasitic in some Australian vertebrate hosts and description of three new species, pp. 204-220 in Zootaxa 5239 (2) on pages 216-218, DOI: 10.11646/zootaxa.5239.2.2, http://zenodo.org/record/762410
Clinical and radiographic outcome of instrumented and non-instrumented fusion. A minimum 5-year follow-up
No full textCydistomyia danielsorum Mackerras & Spratt 2008, sp. nov.
No full text<i>Cydistomyia danielsorum</i> Mackerras & Spratt, sp. nov. <p>(Fig. 16)</p> <p> <i>Type material</i>. Holotype female, N Qld, Archer River crossing, “Wolverton”, Apr., 1989, G. & A. Daniels (AM). Paratype females (2), same data as for holotype; female, 3 km NW Archer River crossing, “Wolverton”, Apr., 1989, G. & A. Daniels; 2 females, 3 km SW Fox Creek crossing, “Wolverton”, Apr., 1989, G. and A. Daniels; 2 females, 26 km W Fairview, Apr., 1989, G. & A. Daniels (GDCB).</p> <p> <i>Non-type material examined.</i> QLD 1♀ Jardine R, Cape York, 11.x.1979 M.S. and B.J. Moulds (GDCB);? NT 2♀ Tenant’s Ck, J.F. Field (ANIC) (see Remarks).</p> <p> <b>Diagnosis</b>. A small pale brown species with fine apical bands and a pale grey vitta with white hairs forming median triangles on abdominal tergites, bulging shiny brown almost quadrate callus with fine anterior extension not reaching middle of frons, and brown antennae. Distinguished from <i>C. torresi</i> by much shorter extension of callus not reaching upper and middle third of frons, fawn grey rather than black palps and grey vitta with white triangles on abdominal tergites. Resembling a small <i>C. fergusoni</i> but with frons wider; callus bulging, shiny, almost quadrate with a very short extension;, palps pale with scattered black hairs; and stigma conspicuous on clear wing. Length 10–12 mm.</p> <p> <b>Female. Head.</b> Eyes (relaxed) green, bare. Frons parallel, wide, index 3.2–3.3, with fawn grey tomentum, fine black hairs; vertical triangle grey with short black hairs; ocellar tubercle ill-defined, raised, brown, anterior ocellus sometimes present; callus bulging shiny brown, nearly quadrate, almost full width of frons at base, with fine short extension not reaching middle half of frons. Subcallus with fawn-grey tomentum, no hairs. Parafacials and face with white tomentum, with fine white hairs; beard white. Antennal scape and pedicel grey, with black hairs; scape twice as long as wide, pedicel narrow with slight anterior extension; antennae orange brown, style slightly darker; basal plate stubby, with gently rounded dorsal angle. Palpi fawn grey, with scattered short black hairs.</p> <p> <b>Thorax.</b> Scutum and scutellum uniformly grey, covered in short white hairs; mesonotum with long black hairs; pleura grey, with white hairs.</p> <p> <b>Legs.</b> Femora pale greyish brown, with fine white hairs; tibiae similar but with black hairs; tarsi dark brown with black hairs.</p> <p> <b>Wings.</b> Clear, with conspicuous brown stigma.</p> <p> <b>Abdomen.</b> Brown with median pale grey vitta with white hairs forming median triangles on tergites 1–5, with fine pale bands with white hairs on apical margins of all tergites; other abdominal hairs black; venter uniformly pale grey with fine white hairs except sternite 7 darker, with long black hairs.</p> <p> <b>Distribution.</b> From Cape York N QLD to S of Cooktown.</p> <p> <b>Etymology</b>. The specific epithet is in honour of Greg and Alice Daniels and their enthusiastic collecting efforts in support of entomology in Australia.</p> <p> <b>Remarks.</b> Two females from Tenant’s Ck. NT (ANIC) are tentatively placed in this species in the absence of accurate knowledge of the locality (? Tennant Ck NT) and their occurrence in NT rather than Cape York QLD.</p>Published as part of <i>Mackerras, I. M., Spratt, D. M. & Yeates, D. K., 2008, Revision of the horse fly genera Lissimas and Cydistomyia (Diptera: Tabanidae: Diachlorini) of Australia, pp. 1-80 in Zootaxa 1886 (1)</i> on pages 20-21, DOI: 10.11646/zootaxa.1886.1.1, <a href="http://zenodo.org/record/5133810">http://zenodo.org/record/5133810</a>
Cydistomyia pruina Mackerras & Spratt 2008, sp. nov.
No full text<i>Cydistomyia pruina</i> Mackerras & Spratt, sp. nov. <p>(Fig. 41)</p> <p> <i>Type material</i>. Holotype female, NSW, Alpine Creek, Kiandra, Jan. 1935, T.G. Campbell (ANIC). Paratype females (6), same data as for holotype (ANIC).</p> <p> <i>Non-type material examined.</i> <b>ACT</b>: 1♀ Bendora, 9.ii.1948, 1♀ 13.ii.1950, S.J. Paramonov (ANIC),. <b>NSW:</b>): 1♀ Mt Gingera,, 17.ii.1965, A.L. Dyce and M.D. Murray (ANIC); 1♀ Wee Jasper, 914 m, 29.i.1933, M. Fuller (ANIC); 2♀ Alpine Ck, Kiandra, 30.i.1964, T.G. Campbell (ANIC), 1♀ 1.i.1963, J. Bancroft and I.M. Mackerras (ANIC), 1♀ 16.i.1935, S.J. Paramonov (ANIC); 1♀ 13 km SE Talbingo, 30.i.1964, T.G. Campbell (ANIC); 2♀ Brindabella to Rules Point, 30.i.1964, G. Wellings (ANIC); 3♀ 5 km NW of Rules Point, 30.i.1964, T.G. Campbell (ANIC); 1♀ Tinpot Clearing, Rules Point, 18.ii.1965, A.L. Dyce and M.D. Murray (ANIC); ♀ Lake Blowering, 14.ii.1977, H. McKenzie (AM); 2♀ Snowy Plains, 1219 m, biting, 11.ii.1978, 2♀ 17-18.ii.1975, D.M. Spratt (ANIC), 1♀ 28.ii.1980, P. Haycock (ANIC); 1♀ Thredbo R, 25.ii.1990, A.L. Dyce (ANIC); 1♀ Mt Kosciuszko, 1219 m, 29.i.1933, 1♀ 27.i.1963, I.M. Mackerras (ANIC), 2♀ 1524 m, 11.ii.1924, A.J. Nicholson (ANIC); 2♀ Yellow Bog Creek, Kosciuszko Nat. Pk., 17.i.1978, G. Daniels (GDCB). <b>VIC</b>: 1♀ Bonang, SW of Delegate, i.1938, F.E. Wilson (ANIC); 1♀ Bogong, SE of Myrtleford, 23.i.1965, N. Dobrotworsky (ANIC).</p> <p> <b>Diagnosis</b>. A medium-sized slatey grey species with conspicuous pale apical bands bearing line of creamy white hairs on abdominal tergites, pale grey wings without darkened costal cell and without brown suffusion along veins, and narrow basal plate with small gentle dorsal angle sometimes bearing small upwardly pointing tooth on antennal flagellum. This species represents the southern highland member of the <i>C. doddi</i> - C. <i>wentworthi</i> series and clearly links it with the large southern <i>C. victoriensis</i>. It is distinguished from <i>C. wentworthi</i> by clear wings, ill-defined ocellar tubercle, wider frons with differently shaped callus and extension which does not generally reach middle of frons, weak dorsal angle on basal plate, uniformly brown legs and characteristic abdominal markings. To be distinguished from <i>C. victoriensis</i> by smaller size, paler slate-grey colouration, clear wings, inconspicuous ocellar tubercle, generally wider frons with differently shaped callus, paler palps, paler antennal scape and pedicel, narrower basal plate with less pronounced dorsal angle, and characteristic abdominal markings. Length 13–17 mm.</p> <p> <b>Female. Head.</b> Eyes (relaxed) black, with short fine sparse hairs just visible at 15X magnification. Frons medium, parallel to slightly divergent, index 3.5–4.5, with grey to greyish fawn tomentum and longish black hairs; vertex depressed; vertical triangle well defined, lighter grey than general tomentum, with short black hairs; ocellar tubercle poorly defined, when present somewhat elongate, depressed, brown; ocelli not visible; callus pyriform, raised, shiny, dark brown, about two-thirds width of frons at base, with tapering extension generally not reaching to middle of frons. Subcallus with fawn grey tomentum, no hairs; parafacials and face with similar but paler fawn tomentum, with numerous black hairs mixed with dull yellowish ones; beard dull greyish cream, with few black hairs. Antennal scape and pedicel brownish fawn, with black hairs; basal plate dark brownish black, narrow, with gentle dorsal angle, sometimes with short upward pointing dorsal tooth; style slightly darker. Palpi brownish fawn, narrow, with short mixed black and white hairs on segment 1, predominantly all black on segment 2.</p> <p> <b>Thorax.</b> Scutum and scutellum dark grey, former with clear indications of darker median and lateral vittae, lighter grey lateral margins; hairs mixed black, grey and greyish white, not appressed. Pleura brownish grey, hairs greyish white anteriorly, mixed with black hairs on mesopleural convexity, with prominent tuft of long creamy white hairs on hypopleural convexity.</p> <p> <b>Legs.</b> Brown, darkening on tarsi; hairs on femora mixed greyish white and black, predominantly black elsewhere.</p> <p> <b>Wings.</b> Greyish, costal cell not darkened; veins not suffused with brown along margins.</p> <p> <b>Abdomen.</b> Slate-grey, with conspicuous pale apical bands bearing line of creamy to creamy white hairs on all tergites. Band usually expanding slightly to form small median triangles with creamy white hairs on tergites 2–5 and similar lateral triangles on tergites 2–4, elsewhere hairs black. Venter paler slate-grey, with similar pale apical bands on all sternites but not bearing creamy white hairs, hairs mixed black and greyish white overall.</p> <p> <b>Distribution.</b> Inland high country ACT, NSW and VIC.</p> <p> <b>Etymology</b>. The specific epithet derives from the Latin for hoarfrost and refers to the characteristic abdominal pattern of this species which is suggestive of a coating of hoarfrost similar to that which occurs commonly at Alpine Ck, Kiandra.</p>Published as part of <i>Mackerras, I. M., Spratt, D. M. & Yeates, D. K., 2008, Revision of the horse fly genera Lissimas and Cydistomyia (Diptera: Tabanidae: Diachlorini) of Australia, pp. 1-80 in Zootaxa 1886 (1)</i> on pages 59-60, DOI: 10.11646/zootaxa.1886.1.1, <a href="http://zenodo.org/record/5133810">http://zenodo.org/record/5133810</a>
Coastal Erosion at Spratt Bight Beach, San Andrés: A study on its cause and the applicability of the Building with Nature approach
No full textSan Andrés is a Colombian-Caribbean Island located 800 km from the Colombian coast. On its Eastern side there is a barrier reef formation protecting the island from offshore incident waves. Due to the protected environment created by the coral reef, sandy beaches can be formed on the East side of the island. During normal conditions, waves come predominantly form the East (90% of the wave climate), have significant wave height of 2 m and period of 8 s. Besides, San Andrés is situated on the Caribbean hurricane route, which can cause an enormous damage to the island. The storm season at San Andrés is between October and December, which is also when major erosion events take place.The economy of San Andrés is mostly built upon tourism, specially related to its biodiverse ecosystems and Caribbean beaches. The island’s ecological environment is composed by mangroves, seagrasses, and coral reefs, attracting a wide spectrum of fauna and flora to its ecosystems.During the Masterplan for Coastal Erosion (PMEC), San Andrés was pointed out as a location in which coastal erosion is problematic. In a follow-up of this Masterplan, the island was elected to be part of a program in which solutions against coastal erosion would be presented. This research is part of this project, as a parallel trajectory to get a more profound understanding of the system and the possible mitigation measures that could be applied on the island.With increasing urbanization and frequency of extreme weather events, erosion is becoming a problem with which San Andrés and its residents are repeatedly having to deal. Erosion is specially problematic for the Northern part of the island, called Spratt Bight. This region is not only the most densely populated area of the island, but also economically and touristically very important. Its beach presents periodically eroding patterns during storm seasons, when wave action drives the sediment towards the East, decreasing its beach width almost to none. A decreasing beach width has a direct negative impact on tourism, making coastal erosion in Spratt Bight not only a coastal safety problem, but also an economic issue.This study aims to look into the main hydro- and morphological processes driving coastal erosion in Spratt Bight and, using the Building with Nature philosophy, propose a set of solutions to mitigate this problem. To reach this objective data analysis and literature research has been carried out, after which different environmental conditions were modelled using the numerical model Delft3D. During these activities it was found that independently of its direction, waves approaching San Andrés break upon the coral reef and induce a water level set up inside the coral lagoon. The difference in water level in- and outside the lagoon generates a current and sediment transport, which is directed towards the western opening in the coral reef.When the Northern waves approach the island (1.5% of the wave climate), the same water level set-up phenomenon is observed. However, as waves are approaching form the North, they not only break upon the reef, but are also able to enter the sheltered lagoon through the western opening in the coral reef. These waves are able to bend around the reef reaching the shore and the headland on the Northern part of the island, inducing a longshore current and a sediment transport that is southeastward directed. The result is that Northern waves are mostly responsible for a strong westward and erosive sediment transport pattern. These waves are mostly observed between October and March, which coincides with the storm season in San Andrés. Besides, it was found that the Eastern waves are responsible for restoring the (dynamic) equilibrium profile of Spratt Bight Beach. However, this restoring force has a less strong intensity, taking more time to restore the beach than to disrupt its equilibrium.The solutions proposed include seagrass restoration to enhance ecology, restrain sediment transport and attenuate wave heights; the beneficial reuse of dredged material, to nourish Spratt Bight Beach; and finally, the implementation of artificial coral reefs as breakwaters to prevent the newly nourished sediment to be lost from the system. Besides, artificial coral reefs enhance the ecosystem by attracting fauna and flora increasing biodiversity. All proposed solutions have a positive impact on the beaches and therefore on tourism and the economy of the island. This makes them multifunctional solutions, serving the main goal of protecting the beach while at the same time creating benefits for other functions and values in the area. Following in this way the prescriptions of the Building with Nature design approach by van Eekelen and Bouw (2020).Civil Engineerin
Cydistomyia pseudobrevior Mackerras & Spratt & Yeates 2008, sp. nov.
No full text<i>Cydistomyia pseudobrevior</i> Mackerras & Spratt. sp. nov. <p>(Fig. 50)</p> <p> <i>Type material</i>. Holotype female, Qld, 5 km W by N of Rounded Hill, Oct. 1980, D.H. Colless (ANIC). Paratype females (5), same data as holotype; 1 female, 1 km N of Rounded Hill, Oct. 1980, D.H. Colless (ANIC).</p> <p> <i>Non-type material examined.</i> <b>QLD</b>: 19♀ 3 km NE of Mt Webb, Oct., 1980, D.H. Colless (ANIC); 1♀ Isabella Falls, Battle Camp Road via Cooktown, Dec., D.K. Yeates (ANIC).</p> <p> <b>Diagnosis</b>. A small narrow-bodied yellowish-brown species, with pale apical bands on abdominal tergites and faint median triangles on tergites 2–4, raised bell-shaped callus, pedicel without dorsal prolongation, entire forelegs dark brown, yellowish costal and subcostal cells of wing and with well-defined right angle on vein R 4 but without appendix. To be distinguished from <i>C. brevior</i> by absence of ocellar tubercle and no suggestion of ocellar spots, tapering extension of callus generally not reaching to middle of frons, bulging subcallus, absence of a dorsal prolongation on the pedicel and presence of median triangles in midline on abdominal tergites 2–4.</p> <p> <b>Female. Head.</b> Eyes in life green, bare (few scattered hairs barely visible at 35X magnification). Frons relatively narrow, parallel, index 4.0–4.2, with pale creamy fawn tomentum and short dark brown hairs; vertex hollow, vertical triangle ill defined, greyish brown with short black hairs; ocellar tubercle not observed; callus brown, shiny, distinctly raised, slightly narrower than frons at base, bell-shaped, with tapering extension generally not reaching to middle of frons. Subcallus bulging, smooth, with cream tomentum, without hairs; parafacials and face with greyish white tomentum and fawn white hairs; beard white. Antennal scape cylindrical, distinctly longer than wide, light yellowish cream, with short black hairs; Pedicel about half as long as wide, without dorsal prolongation, colour and hairs as on scape; basal plate brownish orange, with small dorsal angle projecting as small knob, with few short black hairs at angle; style brown. Palpi moderately plump, pale cream, with short black hairs.</p> <p> <b>Thorax.</b> Scutum and scutellum almost uniformly brown, paler anteriorly and laterally, with short black and creamy white hairs. Pleura pale grey, with white hairs.</p> <p> <b>Legs.</b> Femora brown, whole of foreleg dark brown with dark brown hairs, mid and hind femora with creamy to whitish hairs; tibiae brown, with dark brown hairs mixed with yellowish cream ones on paler parts; tarsi dark brown, with black hairs.</p> <p> <b>Wings.</b> Pale greyish to almost clear, costal and subcostal cells yellowish; stigma yellowish brown; veins light yellowish brown, darker apically and distally; cell R 4 wide; vein R 4 angulate, without appendix.</p> <p> <b>Abdomen.</b> First tergite yellowish fawn, tergites 2–4 light brown, remainder dark brown except 7 th, with light yellowish fawn apical bands; hairs dark on darker parts, yellowish cream on paler areas and forming median triangles in mid line on tergites 2–4. Venter brownish grey, with pale apical bands on sternites; hairs predominantly yellowish cream.</p> <p> <b>Remarks</b>. A single male specimen from Iron Range, north Qld, Aug., R. Jenkins, collected on its own may represent the male of this species. It is small, narrow-bodied and distinguished from male <i>C. brevior</i> by darker abdomen and pale apical bands only on tergites 2–4, although present on all sternites; second segment of palpi short; antennal basal plate small but robust; legs pale.</p> <p> <b>Distribution.</b> Cooktown region N QLD.</p> <p> <b>Etymology</b>. The specific epithet derives from the similarity of the species to <i>C. brevior</i> which occurs in the Northern Territory while <i>C. pseudobrevior</i> appears restricted to north Queensland.</p>Published as part of <i>Mackerras, I. M., Spratt, D. M. & Yeates, D. K., 2008, Revision of the horse fly genera Lissimas and Cydistomyia (Diptera: Tabanidae: Diachlorini) of Australia, pp. 1-80 in Zootaxa 1886 (1)</i> on pages 72-73, DOI: 10.11646/zootaxa.1886.1.1, <a href="http://zenodo.org/record/5133810">http://zenodo.org/record/5133810</a>
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