Rhagovelia abbreviata, Zettel & Laciny & Freitag, 2020
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https://doi.org/ 10.26107/RBZ-2020-0092 |
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lsid:zoobank.org:pub:6963D2F4-0E08-4455-AEFC-735A912DA735 |
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https://treatment.plazi.org/id/1A498792-277A-7802-FF17-F9693E716C54 |
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Diego |
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scientific name |
Rhagovelia abbreviata |
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sp. nov. |
Rhagovelia abbreviata , new species
( Figs. 3C–F View Fig , 7E View Fig , 8B View Fig , 9C–E View Fig , 10D–F View Fig , 11C View Fig , 14A–C View Fig )
Etymology. The species epithet means “shortened” and refers to the peculiar shape of the female’s abdomen.
Type material. Holotype (apterous male; NMNH) labelled “PHIL: Palawan, Roxas, Bagong Bayan, creek downstream of Ilian Falls , 10°25′40″N 119°33′25″E, ca. 50 m, 17.XI.1995, leg. J. Mendoza (# 129)” GoogleMaps . Paratypes (in ADMU, NHMW, UPLB, PNM, PCSD): 22 apterous males, 8 macropterous males, 9 apterous females, 5 macropterous females collected from the same locality (partly labelled “ Bagong Bayan Falls ”); 1 apterous male, 1 apterous female from northern Palawan, El Nido, New Ibahay, mountain creek in disturbed primary forest, ca. 150 m a.s.l. GoogleMaps , 11°13′06″N, 119°29′32″E; 5 apterous males, 3 apterous females from northern Palawan, 20 km N Taytay, Pularaquin, Canequi Falls , 10°56′59″N, 119°28′09″E, 25 m a.s.l. GoogleMaps
Type locality. Northern Palawan, Roxas municipality, barangay Bagong Bayan, Ilian Falls , 10°25′40″N, 119°33′25″E, 40 m a.s.l. GoogleMaps
Diagnosis. Small, body stout, length of male 2.00– 2.13 mm (apterous), 2.14–2.27 mm (macropterous), female 1.92–2.19 mm (apterous), 2.31–2.41 mm (macropterous). Mesocoxa, base of mesotrochanter, and base of metafemur yellow. Body without spike-like setae. Male: Sternites 3–6 with sharp median carinae. Sternite 7 with indistinct paired impressions, a median carina only indicated. Segment 8 ventrally convex. Paramere short, U-shaped, but apex protruded ( Fig. 7E View Fig ). Apterous and macropterous females: Mesofemur with a short depression at ¾ 5 of length, at this position ventrally with a tuft of long setae. Apterous female: Abdomen ( Fig. 10D, E View Fig ) strongly shortened, shorter than wide. Connexiva bearing brushes of black setae at segments 5 and 7. Tergite 6 very short; laterotergite 6 absent; sternite 6 laterally reduced. Apex of abdomen starting from segment 7 directed dorsally, in two females from Pularaquin more posterodorsally. Tergite 8 with long black pilosity posteromedially.
Description of apterous male. Measurements of holotype: Body length 2.00; maximum body width (at metapleura) 0.88. Head length 0.30, width 0.63; minimum eye distance 0.17. Pronotum length 0.22, width 0.72. Lengths of antennomeres: I 0.51, II 0.28, III 0.40, IV 0.32. Lengths of leg segments: profemur 0.66, protibia 0.70, protarsus 0.02 + 0.02 + 0.16, mesofemur 1.09, mesotibia 0.94, mesotarsus 0.07 + 0.38 + 0.38, metafemur 0.78, metatibia 0.84, metatarsus 0.04 + 0.04 + 0.21.
Measurements of paratypes (n = 10): Body length 2.02–2.13; maximum body width (at metapleura) 0.81–0.88. Head width 0.61–0.64. Pronotum length 0.19–0.23, width 0.67–0.70.
Colour: Black. Pronotum with transverse orange mark in centre, laterally reaching level of medial eye margin. Basal half of antennomere 1, distal corner of proepisternum, all acetabula, coxae, and trochanters (mesotrochanter with distal black ring), basal half of profemur, and basal fifth to third of metafemur yellow. Rostrum and juga yellowish to dark brown. Middle of sternite 7 and segment 8 ventrally yellowish brown.
Pilosity: Sides of pronotum, propleuron, and mesopleuron with comparatively short setae. Thorax dorsally with short greyish pilosity. Abdominal tergites in addition to short appressed pilosity with slightly longer, subdecumbent black setae. Entire body without short spike-like setae.
Structures: Head slightly broader than anterior margin of pronotum. Juga flat, inclined, and relatively narrow, without spinulae. Pronotum very short, along midline about 0.7 times as long as head. Mesonotum along midline about 2.5 times as long as pronotum. Proepisterna bearing numerous small black spinulae anteriorly and mesally.
Profemur on extensor side with shallow concavity. Meso- and metacoxa and metatrochanter with numerous small black spinulae. Hindleg polymorphic: strong legs with moderately enlarged femora and strongly curved tibia; slender legs with rather slender femora and almost straight tibia. Stout femora suddenly narrowed at distal third, basal row with 2–7 small spines, large basal tooth of posterodistal row at first third of femur length followed by 3–5 shorter teeth. Slender femora more evenly narrowed distally, basal row with 3–6 small spines, posterodistal row consisting of 3–6 teeth. Anterodistal row with fewer and much shorter teeth than posterodistal row. Metatibia with variable dentition at flexor side.
Laterotergites horizontal. Tergite 7 about 2.0 times as long as tergite 6, and 0.7 times as long as broad. Abdominal venter with sharp median carina at sternites 3–6. Sternite 7 with indistinct paired impressions, a median carina only indicated. Segment 8 ventrally convex. Proctiger slender, lateral wings weakly developed ( Fig. 8B View Fig ). Paramere short, U-shaped, but apex slightly protruded ( Fig. 7E View Fig ).
Description of apterous female. Measurements of paratypes (n = 10): Body length 1.92–2.19; maximum body width (at metapleura) 0.97–1.02. Head width 0.66–0.69. Pronotum length 0.22–0.25, width 0.69–0.75.
Colour: As in male, except propleuron with yellow patch.
Pilosity: Pronotum laterally with long black setae. Mesofemur with normal pilosity, except for a ventral (anterior) patch of long setae in the depression. Mesonotum and tergites 1–7 without pilosity; tergite 8 with stiff, posteriorly-directed black setae. Laterotergites with fine pilosity laterally; connexiva bearing brushes of short black setae at segments 5 and 7. Gonocoxae and proctiger with fine short pilosity only.
Structures: Body slightly broader than in male; abdomen strongly abbreviated. Head distinctly broader than anterior margin of pronotum. Pronotum short, along midline about 0.8 times as long as head. Mesonotum along midline about 3 times as long as pronotum. Mesonotum posteriorly depressed; hind margin straight.
Mesofemur distally flattened, at ¾ 5 of length with unusual short depression (as if squeezed by forceps). Metafemur slender, without basal row of teeth, posterodistal row consisting of 1–3 teeth. Anterodistal row long consisting of minute, between pilosity hardly discernible spinules. Metatibia toothless, straight.
Abdomen ovoid in dorsal aspect. Connexival margins convex, strongly convergent until segment 5, segment 6 not visible in dorsal aspect. Segments 7 and 8 directed straight dorsad. Tergites 1–6 short, visible as narrow stripes; tergite 7 about 3 times as wide as long; tergite 8 largest. Sternite 6 normal at ventral part, laterally strongly narrowed towards connexival margins, and there hidden between sternites 5 and 7. Sternite 7 large, slightly flattened at middle. Gonocoxa large, evenly convex. Proctiger small, narrower than long.
Description of macropterous male. Measurements of paratypes (n = 8): Body length 2.14–2.27; maximum body width (at pronotum) 1.00–1.03. Head width 0.61–0.64. Pronotum length 1.00–1.09.
Colour: As in apterous male. Forewings black, without pale streak.
Pilosity: Apex of pronotal lobe with some long, posteriorly directed black setae. Basal veins of forewing with long black pilosity.
Structures: Pronotum large, with protruding humeri. Forewing with 3 or 4 closed cells, in dealate specimens broken at level of segment 6. Metafemur slender when compared to apterous male. Metatibia straight or weakly curved. In dealate specimens, tergite 7 visible, which is shiny in middle.
Description of macropterous female. Measurements of paratypes (n = 5): Body length 2.31–2.41; maximum body width (at pronotum) 1.09–1.13. Head width 0.66–0.67. Pronotum length 1.13–1.16.
Colour: As in apterous female. Forewings black, without pale streak.
Pilosity: Setae on pronotum and forewings as in macropterous male. Sternites 5–7 at connexival margins with long, posteriorly directed setae, most prominently developed on sternite 7.
Structures: Strongly deviating from apterous female by a moderately shortened abdomen. Pronotum large, with protruding humeri. Forewing as in male. Hindleg slightly slenderer than in apterous female. Abdomen “normal”, directed straight caudad. Sternite 7 about twice as long as sternite 6.
Comparative notes. The apterous female of R. abbreviata , new species, characterised by the shortened and posteriorly upright abdomen, is unique among all species in Southeast Asia, but a similar abdominal morphology is observed in some distantly related species from Madagascar ( Polhemus & Andersen, 2010). The structure of the female’s mesofemur, which bears a distinct depression and tuft of setae, is also exceptional and a valuable character for recognition of winged females. Characters of the male (carinate sternites, paramere with slightly protruded apex) suggest a close relationship with R. estrella . These two species differ from other Philippine species of the R. sarawakensis group by the absence of black spike-like setae on the abdomen.
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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