Eubulides lumawigi, Hennemann, 2023

Eubulides lumawigi View in CoL n. sp.

( Fig. 31-32)

ZooBank: https://zoobank.org/ F40A284B-17B5-4613-A110-FA57107DAB44

HT, ♀: Coll. I.R.Sc.N.B., Philippines, N Luzon, Kalinga, Balbalaan , v. 2014, 17°27’N 121°09’E, Leg. I. Lumawig, gift from B. Kneubühler, I.G.: 32.613 [ RBINS] GoogleMaps .

PT, 2 ♀, 1 ♂: Coll. I.R.Sc. N.B., Philippines, Ilocos Norte, Pagudpod, Kabigan Falls , IV.2014, leg. Heitzmann & Kang [ RBINS] .

PT, ♂: Philippinen, N Luzon Id., Ilocos Region , Provinz Ilocos Norte-Far, Pagudpod, local collector 08.IV.20012 [ FH, No. 1457-1] .

Differentiation. – This large species is recognised by the reduced body armature and the very long and slender ovipositor of ♀ ( Fig. 31 F-H). In aspect of the weakly developed body armature, it most closely resembles E. blaan n. sp. from the island of Mindanao but differs by lacking the distinct obtuse medio-longitudinal carina of the meso- and metanotum and having the keel on the ventral body surface much less distinct ( Fig. 31C). Females may also be differentiated from those of blaan by having the mesonotum more distinctly narrowing towards the anterior ( Fig. 31D, almost parallel-sided in blaan ), less deflexed meso- and metapleurae, rounded posterior margin of the anal segment ( Fig. 31F, distinctly indented in blaan ), broader andmore roundedpit of the praeopercular organ( Fig.30G) and the distinct dentiform posteromedian protrusion of abdominal terga VIII and IX ( Fig. 31H). Males have the mesonotum slightly longer (3.3x vs. 3.1x longer than prothorax in blaan ), the mesosternals much less developed ( Fig.32C,three strong pairs in blaan ),the spines on the ventral carinae of the meso- and metafemora somewhat less pronounced, the posterior margin of the anal segment distinctly bilobed ( Fig. 32F, only with a small median indention in blaan ), the poculum comparatively larger ( Fig. 32H) and the vomer with a straight, much shorter and conical terminal point than in blaan .

From the very similar E. timog n. sp., which however is restricted to the southern half of Luzon, it differs by the larger size and slenderer shape with relatively longer thoracic segments as well as the less distinct cephalic and thoracic armature. Females may also be differentiated by the rounded posterior margin of the anal segment ( Fig. 31F, notably indented medially in timog ) and much longer ovipositor, in which the epiproct is 2x longer than the anal segment ( Fig. 31 F-H, notably less than than 2x in timog ). Males can be separated from those of timog by the relatively slenderer limbs with the hind legs projecting considerably beyond the apex of the abdomen, more distinct medio-longitudinal bulge of the meso- and metasternum ( Fig. 32C), narrower and distinctly bilobed posterior margin of the anal segment ( Fig.32F) and very strong, conical and straight terminal point of the vomer (much slenderer and noticeably arched in timog ).

Etymology. – Named after Ismael O. Lumawig (Bulacan, Luzon, Philippines), the collector of the holotype of this new species in appreciation of his efforts and continuous help in obtaining specimens over many years.

Description

A large, slender and plain species with the body subuniform in width, the body surface densely granulose but lacking any enlarged tubercles or even spines the legs relatively slender and elongate. Thorax with dorsal and ventral side weakly tectate medio-longitudinally. The colouration is described from dried specimens only. Unfortunately, all five specimens at hand have the tips of the antennae broken off, thus the exact number of antennomeres is unknown.

♀ ( Fig. 31)

Form and colouration. – Large (body length 76.5.0- 85.5 mm), slender and body fairly uniform in diameter; body surface very densely granular, the abdominalterga carinatedlongitudinally;ovipositor longand slender.Meso-and metanotum obtusely tectate longitudinally. Colour varying from ochraceous to greyish light or mid brown; fairly plain in all examined specimens but the two paratypes from Kabigan Falls darkened due to preservation. Granulationsof the thoracic segments dark straw-coloured in the holotype. Eyes orangey brown. Antennae somewhat lighter in colour than body.

Head. – Subcylindrical, weakly widening towards the posterior and only 1.2x longer than width at posterior margin with the vertex flattened; surface rough and granular, the median and lateral coronals moderately developed and obtusely spinose and with a short longitudinal furrow between the lateral and median coronals; gulars very small ( Fig. 31D). Eyes small, just moderately projecting and slightly subcircular, length of eye contained 2.6x in length of gena. Antennae projecting over anterior margin of mesonotum. Scapus subrectangular, flattened dorso-ventrally with interior margin noticeably rounded; pedicellus scarcely shorter than scapus and tapering towards apex, III noticeably longer than IV and V; the median joint fairly elongated.

Thorax. – Pronotum equalinwidth butslightlyshorterthanhead,scarcely longer than wide and rectangular in outline withthe transverse mediansulcus shallow and weakly arched; surface unevenly tuberculose and granulose but the tubercles along the lateral margins somewhat more pronounced, the anterior mesal pair of tubercles conicaland only the antero-laterals represented as short spines ( Fig. 31 D-E). Mesothorax just slightly gradually widening towardsthe posterior ( Fig. 31D). Mesonotum about 3.5x longer than wide and parallel-sidedwith the anterior mesalsandantero-lateralsrepresented bysmall conical tubercles; metanotum rectangular and about 1.25x longer than wide; both with a distinct but obtuse medio-longitudinal bulge. Sensory areas of prosternum large and oval. Meso- and metasternum also with an obtuse but rather shallow medio-longitudinally bulge that is covered with some glossy granules and terminates in a warty swelling pre-posteriorly;mesosternum with a row of six strong tuberculiform mesosternals on each side and metasternum with two pairs of small tubercles. Mesopleurae weakly expanded, meso- and metapleurae both distinctly granular and with numerous small but unevenly sized tubercles along the mid-line, the three anterior onesof the mesopleurae somewhat more pronounced than the remaining.

Abdomen. – Median segment trapezoidal with anterior margin weakly rounded and about 1.8x wider than long. Segments II-IV slightly subuniform in width and slightly decreasing in length, all transverse; V-X gradually narrowing. Terga V-IX with a pair of roughly parallel, closely spaced medio-longitudinal carinae and two less distinct lateral carinae on each side, all of which become increasingly pronounced towards IX. Sterna II-VI each with four moderate tubercles that are arranged in a quadrate and a further notably smaller pair of median tubercles; II-IV with an obtuse medio-longitudinal keel.Praeopercular on sternum VII formed by a distinct and deeply impressed pear-shaped median excavation ( Fig. 31G). Terga VIII and IX with the two medio-dorsal carinae converging posteriorly to form a distinct, obtusely triangular protuberance (very prominent and irregularly shaped on IX, Fig. 31H). Anal segment weakly tectate and narrowing towards a broadly rounded – A. Habitus dorsal view. – B. Habitus lateral view. – C. Habitus ventral view. – D. Head and thorax in dorsal view. – E. Head and thorax in lateral view. – F. Terminalia in dorsal view. – G. Terminalia in ventral view. – H. Terminalia in lateral view.

– A. Habitus dorsal view. – B. Habitus lateral view. – C. Habitus ventral view. – D. Head and thorax in dorsal view. – E. Head and thorax in lateral view. – F. Terminalia in dorsal view. – G. Terminalia in ventral view. – H. Terminalia in lateral view.

posterior margin ( Fig. 31F); medially with a pair of small, conical tubercles ( Fig. 31H); the lateral margins straight anteriorly acutely angular medially and with a distinct concave excavation in posterior half ( Fig. 31H). Cerci very small, almost wholly concealed under anal segment and distinctly flattened laterally. Epiproct almost 2.5x longer than anal segment, up-curved, gradually narrowing towards a narrow but blunt tip and weakly tectate medio-longitudinally ( Fig. 31F). Subgenital plate elongate, lanceolate, navicular and up-curved ( Fig. 31H) with the median keel particularly distinct and becoming much more acute inthe apical one-third andtowards the apex ( Fig. 31G), the apex acutely pointed and somewhat projecting beyond tip of epiproct.

Legs. – All coxae with an obtuse ventral spine at posterior margin, this small on pro- and mesocoxae but distinct on metacoxae which bear another minute spiniform tubercle at the base. Profemora smooth dorsally and with three small but acute teeth in apical half of two outer ventral carinae. Dorsal carinae of meso- and metafemora only with 3-5minute teeth in basal portion, otherwise unarmed; the medioventral carina of meso- and metafemora only indicated bya few smallgranules.Twoexteriorventral carinaeof mesofemora with 8-9 small but acute teeth that slightly increase in size towards the apex of femur. Metafemora armed with 10-12 moderate acute teeth on two exterior ventral carinae, which gradually increase in size towards the apex; usually a smaller intercalated tooth present between the three apical ones. Protibiae wholly unarmed, meso- and metatibiae only with a few some weakly indicated dentations ventrally. Tarsi notably less than half the length of corresponding tibiae; basitarsus somewhat longer than preceding joint.

♂ ( Fig. 32)

Form and colouration. – Large for the genus (body length 58.4-59.0mm), form rather slender with the posterior portions of meso- and metathorax not notably inflated. Body surface densely but more minutely granular than in ♀ but the tubercules on head, pronotum, anterior margin of mesonotum as well as the meso- and metapleurae notably more pronounced and partly spiniform. Colour much as in ♀ and uniform but the medio-longitudinal bulge of meso- and metasternum of a slight orangey hue.

Head. – Basically, as in ♀ but the whole surface more distinctly tubercular and the four coronals and gulars relatively more developed and conical, the coronals rather spiniform ( Fig. 32 D-E). Eyes relatively larger and more prominently projecting than in ♀, length corresponding to 0.55x the length of gena.Antennae at least reaching to posterior margin of median segment, as in ♀.

Thorax. – Pronotum basically as in ♀ but slightly more narrowed medially and more elongate in shape, being 1.3x longer than wide; entire surface much more tuberculose than in ♀ with two rows of rather developed medials, of which the two pairs closest to the transverse median furrow are slightly spiniform ( Fig. 32 D-E). Mesothorax slender, 3.3x longer than prothorax and about 4.8x longer than width in median portion, slightly widened at anterior margin and in posterior portion with the median section uniform in diameter. Meso- and metanotum slightly gradually narrowing towards the posterior, surface granular and with a few very low scattered tubercles, particularly along the lateralmargins; the anterior mesal and antero-lateral mesonotals more developed than in ♀ and represented by short but rather strong conical spines. Metanotum subrectangular and weakly narrowed medially, about 2.1x longer than wide and without notably enlarged tubercles. Meso- and metapleurae with a medio-longitudinal row of obtuse variably sized tubercles, the largest of which are slightly spinose; these less pronounced on metapleurae; the antero-lateral tubercle of mesopleurae spiniform ( Fig. 32D). Meso- and metasternum with a low and obtuse medio-longitudinal bulge, that is set with a few glossy granules; mesosternum with four and metasternum with three pairs of small tubercles ( Fig. 32C).

Abdomen. – Median segmentrectangular with anteriormarginsomewhat tectate. Segments II slightly trapezoidal, III-VI roughly uniform in width; II-VII gradually and notably decreasing in length; II-VI on average 1.4x longer than wide, VII roughly quadrate in outline. Terga II-VIII unarmed, VIII and IX with an obtuse medio-longitudinal bulge. Sterna as in ♀ but the four paired tubercles less distinct and II-IV with the medio-longitudinal carina more fine and acute; IX transverse. Anal segment with a fine but acute medio-longitudinal carina dorsally; the lateral margins notably deflexed and angular in basal portion, then concave in lateralaspect ( Fig. 32H); the posterior portion of segment much narrowed and distinctly bilobed with a fairlydeep, triangular median excavation ( Fig. 32F); the outer ventral angles minutely denticulate ventrally. Epiproct very small, roundly triangular and wholly concealed under anal segment. Cerci small, somewhat tapering towards an obtuse tip, distinctly compressed laterally and carinated dorsally and ventrally. Vomer with basal portion inflated laterally and impressed medio-basally; the terminal point very strong, conical, somewhat displaced to the left and rather straight. Poculum bulgy with a distinct median keel in posterior half, the surface otherwise weakly granular; posterior margin and with a medially indented, broad and weakly bi-labiate flange ( Fig. 32G).

Legs. – Relatively longer and slightly slenderer than in ♀; coxae as in ♀. Armature of limbs generally as in ♀ but the ventral spines of the meso- and metafemora somewhat slenderer but longer and more spinose than in ♀.

Variability. – No considerable variability isseen in the five specimens at hand, other than size variation and slight chromatic differences in ♀, which however appear to be mostly caused by the preservation.

Remarks. – Eggs unknown.

Distribution. – N-Luzon:Province Kalinga (Balbalaan [RBINS]);Province Ilocos Norte (Pagudpod [FH]; Pagudpod, Kabigan Falls [RBINS]).