Brasidas viscayanus Rehn & Rehn, 1939

Brasidas viscayanus Rehn & Rehn, 1939 View in CoL

( Fig. 20-21, 23C & 70 J-K)

Brasidas viscayanus Rehn & Rehn, 1939: 438 View in CoL , pl. 31: 12, 34: 27, 38: 45.

HT, ♀: Butuan, Mindanao, Baker; Brasidas viscayanus Rehn View in CoL + Rehn , Type, Hebard Cln; Data Base Serial No. assigned as Type No. September 2008, Type #9119 [ ANSP] ;

PT, ♂: Butuan , Mindanao, Baker; USNM; Allotype No. 53230 U.S. N.M., Alloptype Brasidas viscayanus Rehn + Rehn, Paratype [ USNM] .

- Otte, 1978: 79. (Type data)

- Zompro, 2004: 216.

- Otte & Brock, 2005: 74.

- Brock & Büscher, 2022: 521.

Material examined

1 ♀: Philippinen, Mindanao Island, Prov. Agusan del Sur, San Agustin , local collector III.2010 [ FH, No. 1432-1] ;

1 ♀: Philippinen, Mindanao Island, Prov. Agusan del Sur, San Agustin , local collector V.2013 [ FH, No. 1432-2] ;

1 ♀: Philippinen, MindanaoIsland , Prov.Agusandel Sur, Esperanza, local collector VIII.2011 [ FH, No. 1432-3] ;

1 ♀, 1 ♂: Philippinen, Mindanao Island, Prov. Agusan del Sur, Esperanza , local collector VII.2012 [ FH, No. 1432-4 & 5] ;

6 ♀, 8 ♂, 1 ♂ (penultimate instar), 1♀ (immature): Philippinen, Prov. Agusan del Sur, Sibagat , local collector III-XII.2013 [ FH No’s 1432-6 to 21] ;

1 ♂: Philippinen, Mindanao Island, Prov. Agusan del Sur, San Luis , local collector VIII.2011 [ FH, No. 1432-22] .

Differentiation. – Close and very similar in general appearance to the common Mindanaoan species B. lacerta , but generally larger with the body length of ♀ usually> 95.0mmand that of ♂> 70.0 mm and both sexes are somewhat slenderer in general shape and have the metasternal pseudo-foramina comparatively smaller and more rounded in shape ( Fig.70 E-F).Females may also be distinguished from those of lacerta by having the mesonotum roughly parallel-sided and rectangular in shape with the mesothorax generally more uniform in width, more spinose posterior meso- and metanotals with only a few minute tubercles around the base, the mesosternals more numerous, notably larger and more acute ( Fig. 20F), the triangular posteromedian indention of the anal segment acute-angled (ca. 90°, Fig. 20C), the posterior margin of abdominal sternum VII less inflated and medially indented and the pitof the praeopercular organ smaller ( Fig. 20D).Males can also be separated from those of lacerta by the relatively more elongate abdominal terga (tergum IV 1.75x vs 1.65x longer than wide, Fig.21A), somewhat more pronounced and stronger meso- and metapleural spine, more pronounced medio-longitudinal keel of the meso- and metasternum ( Fig. 70K), slightly more inflated and bi-lobed posterior margin of the anal segment ( Fig. 21D), relatively smaller epiproct and more numerous and smaller ventral dentations of the meso- and metafemora.

Also similar to B. bakeri from Samar and Luzon but both sexes are notably stockier in shape and the head is globose withthe vertex roundly convex and armed with a distinct pair of occipitals medial spines ( Fig. 20 G-H, 21F), whereasthe vertex is flattenedin bakeri andlacksdistinct occipital medials. Females also differ from those of bakeri by lacking the medio-longitudinal bulge of the meso- and metanotum and three dorsal abdominal terga seen in bakeri , notably widening mesonotum (almost parallel-sided in bakeri ), much more pronounced mesosternals ( Fig. 20F), rather rounded metasternal pseudo-foramina ( Fig. 70J, narrowly and elliptical in bakeri ), and longer ovipositor, in which the visible part of the epiproct is noticeably longer than the anal segment ( Fig.20 C-E).Males may also be distinguished from those of bakeri by the shorter mesothorax (3.2x vs. 3.6x longer than pronotum in bakeri ), broader and oval metasternal pseudo-foramina ( Fig. 70K, narrow and slit-shaped in bakeri ), smaller or wanting anterior pair of spines on abdominal terga II-III and bilobed posterior margin of the anal segment ( Fig. 21D, almost straight in bakeri ).

Variability. – The specimens at hand show just slight variability in size, colouration and armature of the thorax and basal abdominal terga. In ♀ the variability is restricted to the size of the individual spines. One ♂ from Sibagat is much more spinose than all other known specimens. It has an additional strong pair each of median mesonotals and medio-lateral mesonotals, as well as a closely spaced pair of slender and acutely pointed medial spines on the median segment (abdominal tergum I) and a pair of distinct latero-anteriors on abdominal terga II and III. All these spines are not present in any of the other specimens in the authors collection, but in all other aspects this ♂ well matches with these. Only the ♂ paratype in the collection of USNM also has the paired antero-laterals on abdominal terga II and III but lacks the other spines seen in the aforementioned Sibagat specimen. Body lengths: ♀ 97.0-103.0 mm, ♂ 72.3-77.5 mm.

Remarks. – The specimens in the authors collection provide us with four new records of B. viscayanus from throughout the Agusan del Sur Province in northeast Mindanao. Eggs unknown.

Distribution. – Endemic. Northeast Mindanao: Province Agusan del Norte (Butuan [ANSP – type locality]); Province Agusan del Sur (San Agustin [FH]; San Luis [FH]; Esperanza [FH]; Sibagat [FH]).

– A. Habitus, dorsal view (Mindanao, Agusan del Sur Prov., Esperanza ) [ FH 1432-2 ]. – B. Habitus, dorsolateral view ( Mindanao , Agusan del Sur Prov., Esperanza ) [ FH 1432-2 ]. – C. Terminaliain dorsal view [ FH]. – D. Terminalia in ventral view [ FH]. – E. Terminaliain lateral view [ FH]. – F. Mesosternum of ♀ [ FH]. – G. Head, prothorax and anterior of mesothorax in dorsal view [ FH]. – H. Head, prothorax and anterior of mesothorax in dorsolateral view [ FH] .