Eubulides igorrote Rehn & Rehn, 1939

Eubulides igorrote Rehn & Rehn, 1939 View in CoL

( Fig. 28-30)

Eubulides igorrote Rehn & Rehn, 1939: 408 View in CoL , pl. 31: 4.

HT, ♂: Imugan, Nueva Viscaya, Luzon, Philippines (W. Boettcher) ;

V.1912; Eubulides igorrote Rehn + Rehn, Type H.1292, Heard Cln ;

Data Base Serial No. assigned as Type No. September 2008, Type

#9125 [ANSP]

- Otte, 1978: 79. (Type data)

- Zompro, 2004: 215.

- Otte & Brock, 2005: 136.

- Brock & Büscher, 2022: 521.

[Not: Eubulides igorrote, Zompro, 1996a: 161 , figs, 2-6. Misidentification, here described as Eubulides timog n. sp.]

[Not: Eubulides igorrote, Sellick, 1998: 208 . (Micropylar plate of egg). This relates to E. timog n. sp.]

[Not: Eubulides igorrote, Zompro, 2004: 209 , figs. This is E. timog n. sp.]

[Not: Eubulides igorrote, Bollens & Krijns, 2010: 10 , figs. (Notes on captive breeding. This is E. timog n. sp.]

[Not: Eubulides igorrote, Harman, 2015: 26 . (Note on PSG culture stock). This relates to E. timog n. sp.]

– A. Habitus dorsal view. – B. Habitus ventral view. – C. Habitus lateral 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.

– 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.

Material examined

1 ♂: Philippinen, N Luzon Id., Central Cordillera Bontoc , Mountain Prov., lower Mount Polis, local collector 24.III.2012 [ FH, No’s 1129-1] ;

1 ♂: Philippinen, N Luzon Id., Province Ifuago, Kamandag, local collector III.2012 [ FH, No’s 1129-2] ;

1 ♀, 3 ♂, 1 ♀ (juvenile): Philippines, Luzon, Nueva Vizscaya, Leg T. Heitzmann & A. Kang 2013 [ RBINS] ;

1 ♀, 1 ♂: Luzon , Mt. Prov. , Sagada, Mt. Polis 2000m +, 16°57’40”N 121°1’18”E, Mossy for., 15.IV.2014, I.G. 32700, Mission Leopold III Funds, Constant J., Bresseel J. & co. [ RBINS] GoogleMaps ;

2 ♂: N Luzon, Mt. Prov. , Cadaclan, Aug.2011, gift from B. Kneubühler, I.G. 32882 [ RBINS] .

Differentiation. – Both sexes of this small species are well recognised by the four strong anterior spines of the mesonotum, and distinct spines along the lateral margins of the pronotum, which includes a very strong postero-lateral spine. The ♀ resembles E. timog n. sp. from southern Luzon in general appearance but is notably smaller and stockier in shape and differs by the characteristic pro- and mesothoracic armature mentioned above. The eggs are characteristic for the distinct bristles of the operculum and short micropylar plate, which corresponds to only 70% of the dorsal capsule length and is basically roundly rectangular in outline with the two posterolateral extensions short and directed towards the capsule pole.

Description

A description of the previously unknown ♀ was provided by Acola et al. (2022:3),but sincethe notablysmaller specimensathandfromthe collection of RBINS differ in some aspects, a description of these appears desirable. The colouration is described from dried examples and pictures of live specimens.

♀ ( Fig. 28)

Form and colouration. – Small (body length 53.0-58.0 mm), form stocky for the genus with distinct and characteristic prothoracic and anterior mesothoracic armature; body surface all over densely granular and with scattered tubercles or short spines; granules smaller on abdomen although. Colour varying greyish to ochraceous mid brown and occasionally with some olive parts, the genae with a washed olive green postocular streak;the largest elements of armature dark green to olive. Eyes dark reddish brown. Antennae with some pale ochre colouration basally.

Head. – Subcylindrical, gradually widening towards the posterior and about 1.25x longer than wide with the vertex flattened; surface rough and granular ( Fig. 28 D-E). The median and lateral coronals well developed if compared to congenerics and obtusely spinose, some of the occipital medials small butspiniform;gulars very small.Eyessmall slightly subcircular and less than half as long as gena, rather weakly projecting.Antennae with 26 joints and reaching to posterior margin of metanotum. Scapus flattened dorsoventrally with interior margin somewhat rounded and narrowed at base, pedicellus shorter than scapus and tapering towards apex, III noticeably longer than IV and V, the median joints noticeably elongated.

Thorax. – Pronotum shorter but about equal in width to posterior portion of head, somewhat wider than long and gently constricted medially with the transverse median sulcus moderately impressed and weakly arched; surface unevenly tuberculose and granulose, the antero-laterals represented by short spines, the postero-laterals very prominent spines and the lateral margins with about four somewhat unequally sized but smaller lateral pronotal spines ( Fig. 28 D-E). Mesothorax 2.3x longer than prothorax and slightly gradually widening towards the posterior. Mesonotum almost rectangular about 2x longer than wide and with distinct anterior spines. Anterior mesonotals represented by distinct spines that are roughly equal in size to the postero-lateral pronotals ( Fig. 28E); the anterior mesal mesonotals distinct but notably smaller; otherwise only with a small conical pair of pre-medians and posterior mesonotals as well as about four similarly sized tubercles along lateral margins. Metanotum slightly trapezoidal, about as wide as long with posterior margin concave and merely with a moderate pair of short, conical and simple posterior metanotals. Meso- and metasternum very weakly and obtusely tectate ( Fig. 28C), the mesosternum with a row of five and the metasternum with 2-3 conical tubercluliform sternals. Mesopleurae moderately expanded towards the posterior and with a median longitudinalrow of unevenly sized, short, conical spines; the metapleure only with conical tubercles.

Abdomen. – Median segment with anterior margin widely rounded and about 3x wider than long.Segments II-VII notably decreasing in length with VII scarcely more than half the length if II; II subrectangular, III-V notably widening and VI-VII distinctly narrowing; tergum V broadest and 4.2 wider than long. Terga III-V with fivesmall anteriortuberclesalonganteriormarginandanodelike pair of medial tubercles; VII weakly tectate longitudinally. Sterna II-V each with two pairs of obtuselyspiniform tubercles;these only represented as nodes onVI andwanting on VII.Praeopercular organ a smalland narrowmedian slit at posterior margin, that opens into a small rounded pit ( Fig. 28G). Terga VIII and IX much narrower than preceding and all tectate longitudinally;VIII slightly widerthanlongand roughly rectangular inoutline; VIIIand IX with a onobtuse conical posterior swelling, which covers more than two-thirds of the length of tergum on IX ( Fig. 28H). Anal segment narrowing towards a narrow but rounded posterior margin that merely has a very small and shallow median indention ( Fig. 28F); the lateral margins straight anteriorly acutely angular medially and with a distinct concave excavation in posterior half ( Fig. 28H). Cerci small,slender and flattened laterally. Epiproct about 1.6x longer than anal segment, up-curved, gradually narrowing towards a slender but blunt tip and weakly tectate medio-longitudinally ( Fig. 28F, H). Subgenital plate elongate, lanceolate, navicular and up-curved( Fig. 28H) with the median keel distinctand becomingmore acute towards the apex ( Fig. 28G), the apex acutely pointedand just scarcely projecting beyond tip of epiproct.

Legs. – All coxae with a blunt ventral spine at posterior margin, this very small on pro- and mesocoxae but fairly distinct on metacoxae. Profemora strongly arched and prominently constricted in basal half; smooth dorsally and with three small teeth in apical half of two outer ventral carinae. Dorsal carinae of meso- and metafemora only with about four (mesofemora) to six (metafemora) very low and blunt teeth; the two basal ones more spiniform than the remaining ones. Medioventral carina of meso- and metafemora only indicated by a few small granules. Two exterior ventral carinae of mesofemora with 3-4 acute teeth in apical one-third of femur. Metafemora armed with 9-10 rather strong spines on two exterior ventral carinae, that gradually increase in size towards the apex; usually a smaller intercalated spine is present between the three prominent apical spines. Protibiae wholly unarmed, meso- and metatibiae only with a few small undulations dorsally and ventrally. Tarsi stout and almost half as long as corresponding tibiae; basitarsus somewhat longer than preceding joint.

Measurements [mm]. – Body 53.0-53.5, pronotum 4.0-4.1, mesonotum 11.8-12.0, metanotum 7.8-7.9, median segment 2.4-2.5, profemora 11.0-11.5, mesofemora 9.6-9.8, metafemora 11.9-12.0, protibiae 9.3-9.5, mesotibiae 7.9-8.0, metatibiae11.3-11.5,antennae23.0-24.0.

Variability. – The specimens recorded from Mount Palalai, Nueva Vizcaya Province by Acola et al. (2022) are notably larger than all other specimens at hand from the collection of RBINS and the authors collection. Body length ♂ 35.7-39.7 mm ( RBINS, FH) vs. 44.0 mm ( UPLB), ♀ 53.0- 53.5 mm ( RBINS) vs. 58.0 mm ( UPLB). Moreover, the two UPLB specimens have the pro and mesothoracic armature notably less developed. The posterior pronotals in particular are only represented by short and rather obtuse spinose tubercles in the UPLB examples, whereas these are strong and acutely pointed spines in all other specimens .

Remarks. – ThespecimensfromMountBanahaw recordedas E.igorrote by Zompro (1996) were misidentified and represent E. timog n. sp. (see below). Thus, it is somewhat surprising that Acola et al. (2022: 3) state that “ Zompro’s (1996) descriptions of both sexes including the egg agree to every part of characters ”, although there are obvious morphological differences.

The ♂ available for examination allow a description of the terminalia, which are missing in the holotype specimen in the collection of ANSP. Although a brief characterization of the ♂ wasprovided byAcola et al. (2022: 3) are more detailed description of the terminalia shall be presented here. These may be describedas follows: Terga VII-X slightly subuniform in length, VII and IX rectangular and subquadrate. Anal – A. ♂ dorsal view (N-Luzon, Ifuago Province , Kamandag ) [ FH 1129-2 ]. – B. ♂ dorsolateral view [ FH 1129-2 ]. – C. ♂ ventral view [ FH 1129-2 ]. – D. Terminalia of ♂ in lateral view (N-Luzon, Mountain Province, Bontoc , Mount Polis ) [ FH]. – E. Terminalia of ♂ in dorsal view [ FH]. – F. Terminalia of ♂ in ventral view [ FH]. – G. Live ♀ at N-Luzon, Ifuago Province, Banaue [© Albert Kang, https://www.inaturalist.org/ observations/57614279]. – H. Live ♂ at N-Luzon, Ifuago Province, Banaue [© Albert Kang, https://www.inaturalist.org/observations/57609270]. segment with lateral margins notably deflexed and angular in basal half, the posterior half strongly narrowed ( Fig. 30D); the posterior margin weakly concave medially ( Fig. 29F, 30E) and the outer lateral angles somewhat inflated, obtusely rounded und minutely denticulated ventrally. Vomer with a rather small base and a long, digitiform and gently dextral-curved, acutely pointed terminal hook ( Fig. 30F). Poculum fairly large- bowl-shaped and with posterior margin distinctly, triangularly indented medially and bilobed ( Fig. 29G, 30F). While all dried specimens are brown in general colour, the ♂ photographed at Banaue, Ifuago byAlbert Kang ( Fig.30H) shows an olive green meso- and metanotum with distinctive ochre and dark brown markings in the posterior portions. A description and illustration of the eggs was provided by Acola et al. (2002: 4, fig. 1A-B) .

Distribution. – Luzon, endemic. Northern central Luzon, Province Nueva Vizcaya (Imugan [ANSP – type locality]; Mount Palali [UPLB]); Province Ifuago (Kamandag [FH]; Banaue [RBINS]); Mountain Province (Bontoc, Mount Polis [FH]; Sagada, Mount Polis 2000 m [RBINS]; Cadaclan [RBINS]).