Obrimus uichancoi Rehn & Rehn, 1939

Obrimus uichancoi Rehn & Rehn, 1939 View in CoL

( Fig. 43 & 44E)

Obrimus uichancoi Rehn & Rehn, 1939: 426 , pl. 31: 7, 32: 14, 38: 42. HT, ♀ (juvenile): Ripang, Feb. 1918 (W. Boettcher); Obrimus uichancoi Rehn + Rehn Type, Hebard Cln [ANSP].

- Otte, 1978: 79. (Type data)

- Zompro, 2004: 215.

- Otte & Brock, 2005: 228.

- Brock & Büscher, 2022: 521.

Material examined

6 ♀: Philippinen, N-Luzon Island, Mountain Prov. , Cordillera, Bay-Yo village, 1200 m, local collector, I.2010 [ FH, No’s 1347-1 to 6] ;

2 ♀: Philippinen, N-Luzon Id., Provinz Ifuago , Central Cordillera, Mayoyao, ca. 450 m, local collector, 15.II.2011 [ FH, No’s 1347-7 & 8] ;

1 ♀: Philippinen, N-Luzon Id., Provinz Ifuago , Central Cordillera, Kinakin, 1300 m, local collector, 3.X.2010 [ FH, No. 1347-9] ;

2 ♀: Coll. R.I.Sc. N.B., Philippines, Luzon , Nueva Vizcaya, Bay-Yo, VI.2012, leg. A. Kang [ RBINS] ;

1 ♀: Coll. R.I.Sc. N.B., Philippines, Luzon , Banaue, Kinakin, leg. T. Heitzmann [ RBINS] .

Differentiation. – Females of this rarely known species (the only sex known) basically differ from the two other known ♀ of the genus, this is O. bicolanus and O. bufo , by the notably less pronounced body armature, which concerns to the meso- and metapleural spines in particular. From those of bicolanus , to which they show the closest overall resemblance, these ♀ may also be separated by the very indistinct median mesonotals ( Fig.43B) as well as medials and second paired posteriors of the abdominal terga I-VI ( Fig. 43B), but instead having a fairly distinct pair of posterior mesal pronotals that are about half the size of the posteriors, and having the triangular median excavation of the anal segment broader and larger ( Fig. 43C). From the ♀ of bufo , those of uichancoi readily differ by the smaller size and somewhat stockier shape, having abdominal segments III-IV almost 2x wider than long ( Fig. 43A, only 1.6x wider than long in bufo ), strong lateral coronals, slightly deflexed and obtusely dentiform posterior portions of the lateral margins of abdominal terga V-VIII and differently shaped praeopercular organ ( Fig. 43D), which consists of two oval swellings (a transverse and slightly bi-gibbose swelling at posterior margin in bufo ).

Remarks. – This species has not been recorded since its description, which was based on a unique immature ♀ holotype from the Mountain Province in northern Luzon in the collection of ANSP. Thus, the ♀ at hand from the authors collection are the first adult specimens to become known of O. uichancoi , are illustrated herein and add precious new records. These nine ♀ show little variability with the specimens from the Ifuago Province being slightly larger on average. Slight variation is only seen in the size of the median mesonotals, which are somewhat more pronounced in the examples from Bay-Yo village, Mountain Province. Body length of these ♀ is 85.5-100.0 mm. The ♂ and eggs remain as yet unknown.

Distribution. – North Luzon: Mountain Province (Apayao, Ripang 17°48’N 121°90’E [ANSP – type.locality]; Bay-Yo village, 1200 m [FH; RBINS]); Province Ifuago, Central Cordillera (Mayoyao, ca. 450 m [FH]; Banaue, Kinakin, 1300 m [FH, RBINS]); Laguna Province (Los Baños [ANSP]. South Luzon: Province Quezon (San Narciso Municipality, Binay [ANSP]).