Ornebius alvarezi, Tan & Ingrisch & Baroga-Barbecho & Yap, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4590.1.7 |
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publication LSID |
lsid:zoobank.org:pub:1C4F5A48-172A-443B-9013-C33DB821F6E4 |
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persistent identifier |
https://treatment.plazi.org/id/039687A1-FFDB-A25D-FF23-FC4F8DB96A94 |
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treatment provided by |
Plazi |
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scientific name |
Ornebius alvarezi |
| status |
sp. nov. |
Ornebius alvarezi View in CoL sp. nov.
( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 )
Material examined. Holotype (male, Siargao18_45): Philippines, Surigao del Norte, Siargao Island, Municipality of Del Carmen, Barangay Katipunan , N9.87607, E126.01022, 23.2± 5.3 m, calling on coconut trunk, 14 October 2018, 22 11 hours, coll. M. K. Tan, J. B. Baroga-Barbecho & S. A. Yap (UPLBMNH). GoogleMaps
Diagnosis. The new species differs from congeners by the combination of these characters: apical and subapical segments of maxillary palps stout; tegmen dark brown with apex darker; last abdominal tergite with hind margin emarginate but substraight in middle, laterally projecting cones yellow at tip and provided with long setae pointing posteriorly; paraproct process dark, with emargination between process and base deep and narrow, with numerous setae on distal surface; male genitalia strongly sclerotized and lateral valves forming a tube.
Comparison with congeners. The new species is similar in colouration to O. vadus Ingrisch, 1998 from Sabah but missing the white band on abdomen; it is also similar to O. dumoga Ingrisch, 2006 and O. consternus Ingrisch, 2006 from Sulawesi but differs by generally darker colouration. The new species has a wide black posterior band on tegmen that differs from the more uniformly coloured yellowish brown tegmen in O. dumoga while it is similar to tegmen colour in O. consternus . But the latter species has a prolonged pronotum that covers most of tegmen while in O. alvarezi sp. nov. is of normal shape for the genus.
The new species also has similar paraproct as O. dumoga and O. consternus but differs by the apical appendix being uniformly conically instead of faintly compressed and faintly hooked at the apex, darker than in O. consternus and the distal surface more densely covered with setae than in O. consternus . The paraproct appendix of O. vadus differs by being rather thin, faintly sinuate, black, and forming only a shallow emargination towards base.
The basic shape of the phallus of O. alvarezi sp. nov. is similar to that in O. dumoga or O. consternus , characterised by the male phallus that have the external sclerites strongly developed, the lateral valves form a tube in apical area, and the medial valve has the internal sclerites laterally expanded in the basal spermatophore sac area. The new species differs from O. dumoga by the basal spermatophore sac area being narrower than instead of about as wide as base of lateral valve tube in dorsal view, and in lateral view the basal spermatophore sac area is longer than tall instead of taller than long. It differs from O. consternus by less sinuous sclerotized parts of the lateral valves.
The new species differs from O. dumoga and O. consternus also by stouter and shorter maxillary palps.
The dark colouration of tegmen and abdominal apex of the new species are also similar to O. pullus Ingrisch, 2006 . It differs by the elongate instead of stout paraproct appendix and by the genitalia that are without membranous lateral lobes.
Comparison with congeners from the Philippines. The new species differs from O. cucullatus (Bolívar, 1889) described from Albay (Luzon Island) by the frontal rostrum that is 1.3 times wider than the scapus instead of narrower, and by the dark tegmen colouration instead of whitish, milky, with base and hind edge stained brown in O. cucullatus . The new species differs from O. abdominalis (Stål, 1877) from Luzon Island and Palawan Islands by smaller body (length less than 8 mm instead of larger than 10 mm) and by the dark tegmen colouration instead of being entirely amber yellow. Genitalia of O. cucullatus and O. abdominalis were not described.
Description (male holotype). Habitus of male as shown in Fig. 1 View FIGURE 1 . Dorsum of head flattened ( Fig. 2A View FIGURE 2 ). Frontal rostrum 1.3 times wider than scapus; vertex with very small and rounded lateral ocelli near margin of scapus. Maxillary palps with apical (= fifth) and third segments of subequal length, subapical (= fourth) segment shorter than apical segment; apical segment triangular and widened apically, subapical segment stout and slightly widened at apex ( Fig. 2B View FIGURE 2 ). Pronotum about 1.3 times longer than wide with anterior dorsal margin straight; lateral margin widening posteriorly; posterior margin convex, not covering base of mirror of tegmen ( Fig. 2C View FIGURE 2 ). Tegmen only feebly wider than posterior area of pronotum; posterior margin convex; mirror roughly triangular, about 1.1 times wider than long ( Fig. 2C View FIGURE 2 ). Fore tibia with internal tympanum oval; without external tympanum. Hind femur 1.4 times longer than hind tibia; hind tibia 2.7 times longer than hind metatarsus.
Male. Supra-anal plate with last abdominal tergite and epiproct distinctly separated by a transverse suture; last abdominal tergite transverse, with hind margin emarginate but substraight in middle, laterally projecting cones yellow at tip and provided with long setae pointing posteriorly; supra-anal plate less transverse than last abdominal tergite, flattened, with fewer setae, apex truncated ( Fig. 2D View FIGURE 2 ). Paraproct in lateral view with emargination between process and base deep and narrow; process long and cylindrical, with numerous setae on distal surface, apex obtuse ( Figs. 2 View FIGURE 2 E–2G). Genitalia as in Figs. 2 View FIGURE 2 H–2J. Epiphallus membranous. Central lobe of phallus with lateral valves elongate, tapering into a subacute apex, in apical area with inner margin curved (in dorsal view); both sides together almost forming a dorsally open tube, with external part more sclerotized than inner part (in dorsal view); external sclerites well developed; medial valve with base widened and strongly curved, almost forming a spiral; curvature somewhat flattened (in lateral view). Internal sclerites at base expanded, afterwards elongate. Basal spermatophore sac area in dorsal view less wide than base of lateral valve tube; basal spermatophore sac area in lateral view longer than tall.
Female. Unknown.
Colouration. Head, including frons, scapus, and frontal rostrum greyish brown; genae and lateral parts of head with white scales ( Fig. 1C View FIGURE 1 ). Maxillary and labial palps yellow brown. Pronotal dorsal disc yellow brown, apical margin with white scales; lateral lobes also with white scales ( Fig. 1 View FIGURE 1 ). Male tegmen dark brown; in dorsal view apex darker; ventral half of lateral field darker than dorsal half ( Figs. 1B View FIGURE 1 , 2C View FIGURE 2 ). Femur generally light to pale yellow brown, basally with some black scales; tibia pale, with some black scales. Hind femur white baso-ventrally, otherwise marmorated with grey scales ( Fig. 1C View FIGURE 1 ). Abdomen with tergites covered with greyish brown scales ( Fig. 1C View FIGURE 1 ); sternites white. Abdominal apex dark ( Figs. 2D, 2E View FIGURE 2 ), last abdominal tergite laterally with a black spot and yellow at the apical parts ( Figs. 2D, 2E View FIGURE 2 ), subgenital plate black. Paraproct dark brown. Cercus light brown.
Measurements. BL = 6.5; FRW = 0.4; SW = 0.3; EW = 0.3; PL = 3.2; PW = 2.5; TL = 2.8; TW = 2.6; HFL = 4.2; HTL = 3.0; HML = 1.1 mm.
Etymology. The name of the species is dedicated to the late Mr. James DV. Alvarez from the University of the Philippines Los Baños—researcher par excellence and a dear friend to many. He was a meticulous researcher primarily on the taxonomy, ecology and biogeography of bats—his favourite organism—but his interests also include complementary work on the taxonomy and ecology of entomofauna ectoparasitic on bats.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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