Brasidas bakeri Rehn & Rehn, 1939

Brasidas bakeri Rehn & Rehn, 1939 View in CoL

( Fig. 7-8, 70 A-B & 73C-D)

Euobrimus bakeri Rehn & Rehn, 1939: 452 View in CoL , pl. 35: 32, 37: 39.

HT, ♂: Island, Samar , Baker; USNM; Euobrimus bakeri Rehn View in CoL + Rehn, Type; Type No. 53317, U.S. N.M [ USNM] ;

PT, ♀: Island, Samar, Baker; USNM; Euobrimus bakeri Rehn + Rehn, Paratype; Type No. 53317, U.S. N.M [ USNM] ;

PT, ♀: Island, Samar , Baker; Euobrimus bakeri Rehn + Rehn, Paratype [ ANSP] .

- Zompro, 2004: 216.

- Otte & Brock, 2005: 137.

- Brock & Büscher, 2022: 521.

= Euobrimus hoplites Rehn & Rehn, 1939: 450 View in CoL , fig. 6.

HT, ♂ (juvenile): Island Samar, Baker; Euobrimus hoplites Rehn View in CoL + Rehn , Type, 1342, Hebard Cln.; Data Base Serial No. assigned as Type No. September 2008, Type # 9122[ ANSP]. n. syn .

- Otte, 1978: 79. (Type data)

- Zompro, 2004: 216.

- Otte & Brock, 2005: 137.

- Brock & Büscher, 2022: 521.

Obrimus lacerta Redtenbacher, 1906: 39 (in part – only PLT, ♂: Type; Luzon, Jagor ; Obrimus perforatus Redt. n. sp.; 3220, Zool. Mus. Berlin [MNHU]).

Material examined

1 ♂: Philippinen, Eastern Visayas, Provinz Northern Samar, Samar Island, Lope de Vega , local collector II.2009 [ FH, No. 1128-1] ;

1 ♀, 2 ♂: Philippinen, O-Luzon Id., Provinz Aurora, Dingalan , local collector X.2012 [ FH No’s 1128-2 to 4] ;

1 ♂: Philippinen, Prov. Leyte, S-Leyte Island, Mahaplag , lowland, local collector VI.2012 [ FH, No. 1128-5] ;

1 ♀, 1 ♂, 1 egg: Philippines, Leyte Island, Mt. Balocaue , 19-29IX. 2005, leg. R. Cabale [ RBINS] ;

4 ♀, 1 ♂, 1 egg: Philippines, Samar Isl., MountCapoto 2010, 12°13'12"N 125°08'22"E, I.G. 32,386 Gift J. Bresseel, Leg. R. Cabale [ RBINS] GoogleMaps .

Differentiation. – Close to B.viscayanus from the island of Mindanao but both sexes much slenderer and the vertex flattened and lacking distinct occipital medials ( Fig. 7 G-H, 8H), whereas the head is rather globose with the vertex roundly convex and a distinct pair of occipitals medial spines in viscayanus . Females may also be separated from those of viscayanus by the distinct medio-longitudinal bulge of the meso- and metanotum and three dorsal abdominal terga, almost parallel-sided mesonotum (notably widening towards the posterior in viscayanus ), much smaller mesosternals, noticeably larger and rather oval metasternal pseudo-foramina, that cover about two-thirds of the lateralportion of the metasternum in front of the metacoxal ( Fig.70A), and shorter ovipositor, in which the visible part of the epiproct is scarcely longer than the anal segment. Males may additionally be distinguished from viscayanus by the much longer mesothorax (3.6x vs. 3.2x longer than pronotum in viscayanus ), narrower and slit-shaped metasternal pseudo-foramina ( Fig. 70B, rather oval in viscayanus ), more distinct anterior pair of spines on abdominal terga II-III and almost straight and entire posterior margin of the anal segment ( Fig. 7M, distinctly bilobed in viscayanus ).

Variability. – The specimens available show some variability in the spination of the thorax and three basal abdominal terga. The ♀ from Dingalan, Luzon matches well with the type-specimens but has the meso- and metathoracic spines notably longer with the medio-lateral mesonotal particularly strong. In ♂ the spines of the mesonotum in particular show variability in the five examples available, with these being remarkably strong in the specimens from Mount Balocaue, Leyte in the collection of RBINS ( Fig. 8J). The ♂ from Lope de Vega, Samar ( Fig. 7 A-B) is lighter in colour than the four other examples from Luzon, Leyte and Samar and bears a moderately distinct pair of median mesonotals. This pair of spines is similarly large in the specimen from Mount Mahaplag , Leyte, whereas the ♂ from Mount Balocaue , Leyte is remarkable for having all elements of the head and body armature notably more developed than any of the other examined specimens with the posterior meso- and metanotals particularly prominent and bi-fid. Therefore, the pair from Mount Balocaue is here illustrated on a separate plate ( Fig. 8). The two examples from Luzon differ considerably from each other in aspect of the mesonotal armature, one having the median mesonotals only represented by a pair of small tubercles like in the holotype, the other having these spines moderately developed and even bearing a pair of similarly sized pre-median mesonotals. The occipitals also show noteworthy variability in size among these four specimens. Body lengths: ♀ 89.5-90.5 mm, ♂ 56.0- 60.5 mm .

Description of egg ( Fig. 73 C-D). – Moderately sized for the genus; slightly oval in cross-section; about 1.8x longer than wide. Capsule curved in lateral aspect with ventral surface almost plain and dorsal surface strongly convex. Surface sparsely and unevenly pitted; surface otherwise smooth except for the anterior one-fifth and operculum, which are minutely rugulose. Micropylar plate large and

– A. ♂ dorsal view (N-Samar, Lope de Vega ) [ FH 1128-1 ]. – B . ♂ dorsolateral view (N-Samar, Lope de Vega ) [ FH 1128-1 ]. – C . ♀ dorsal view (N-Luzon, Aurora, Dingalan ) [ FH 1128-1 ]. – D . ♀ dorsal view (N-Luzon, Aurora, Dingalan ) [ FH 1128-2 ]. – E. Mesosternum of ♀ (NLuzon, Aurora, Duingalan ) [ FH 1128-2 ]. – F. Mesosternum of ♂ (S-Leyte, Mahaplag ) [ FH 1128-5 ]. – G. Head, prothorax and anterior of mesonotum of ♀ in lateralview (N-Luzon, Aurora, Dingalan ) [ FH 1128-2 ]. – H. Head, prothorax and anterior of mesonotum of ♂ inlateral view (N-Samar, Lope de Vega ) [ FH 1128-1 ]. – J. Terminalia of ♀ in dorsal view (N-Luzon, Aurora, Dingalan ) [ FH 1128-2 ]. – K. Terminalia of ♀ in ventral view (N-Luzon, Aurora, Dingalan ) [ FH 1128-2 ]. – L. Terminalia of ♂ in lateral view (N-Luzon, Aurora, Dingalan ) [ FH 1128-4 ]. – M. Terminalia of ♂ in dorsal view (N-Luzon, Aurora, Dingalan ) [ FH 1128-1 ]. – N. Terminalia of ♂ in ventral view (N-Luzon, Aurora, Dingalan ) [ FH 1128-1 ] .

– A. ♀ dorsal view. – B. ♀ dorsolateral view. – C. ♀ lateral view. – D. ♀ ventral view. – E. ♂ dorsal view. – F. ♂ lateral view. – G. ♂ ventral view. – H. Head, pro- and anterior of mesothorax of ♀ in dorsolateral view. – J. Head and thorax of ♂ in lateral view. – K. Terminalia of ♂ in lateral view. – L. Terminalia of ♀ in dorsolateral view. – M. Terminalia of ♀ in dorsal view. – N. Terminalia of ♂ in ventral view.

0.8x the length capsule; broadly Y-shaped with the median portion parallel-sided and obtusely rounded anteriorly and the two posterolateral extensions rather short, oval and extending on lateral surfaces of capsule at an angle of about 80°; surface of plate pitted like capsule and the outer margin weakly inflated and unevenly rugulose. Posterior portion of plate widely V-shaped with a minute knob-shaped micropylar cup in centre. Median line distinct and formed by a narrow bulge that almost extends to polar area. Operculum almost round with the outer margin flat and the centre weakly swollen; surface rugulose with irregular radially directed furrows; inserted into capsule at an angle of about 20°. General colour plain greyish with the anterior portion of capsule brownish; outer margin of micropylar plate slightly darker grey than capsule. Measurements [mm]: Length 5.3, width 2.7, height 3.0, length of micropylar plate 4.0.

Remarks. – Euobrimus hoplites Rehn & Rehn, 1939 is a juvenile ♂ and hence here synonymised with B. bakeri (n. syn.). This nymph agrees in the mesonotal spination with a specimen from East Luzon in the authors collection (FH 1128-4) and merely has the three mesopleural spines more developed than adult specimens, which is not unusual within Obriminae . The other differences mentioned by Rehn & Rehn (1939: 451) also fall within the intraspecific variability of bakeri , which the specimens now at hand shown to be fairly remarkably.Although hoplites would have page priority over bakeri (page 450 vs. 452), bakeri is here chosen as the valid name because this taxon is based on three adult specimens and thus provides more sufficient stability of this species. The new material now at hand from the authors collection represent three new records of this rather distinctive species, which extend the range to the islands of Luzon and Leyte.

Distribution. – Samar, Luzon and Leyte. “ Samar ” [USNM, ANSP]; Province Northern Samar, Lope de Vega [FH]; Province Samar, Mount Capoto-on [RBINS]. “Luzon” [MNHU]. East Luzon, Province Aurora (Dingalan [FH]). Province Leyte, South Leyte (Mahaplag [FH], Mount Balocaue [RBINS]).