Pergalumna boliƲiana Ermilov, Ermilov, 2013

Pergalumna boliƲiana Ermilov View in CoL spec. nov.

Figs 1 - 11

Material examined. Holotype: female, locality Bol. – Paratypes: three males and three females, same locality and date as holotype (see Material and methods) .

Type deposition. The holotype (alcohol) is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia ; three paratypes (alcohol) are deposited in the collection of the Siberian Zoological Museum , Novosibirsk, Russia ; three paratypes (alcohol) are in the personal collection of the first author.

Diagnosis. Body size 415 - 464 × 282 - 332. Body surface microfoveolate; prodorsum, posterior part of notogaster and ano-adanal region with striate bands. Rostrum with tooth. Interlamellar setae only by alveoli represented. Sensilli long, setiform, ciliate. Anterior margin of notogaster not developed. Three pairs of porose areas present (Aa weakly transverse oval; A1 rounded; A2+A3 oblong), sometimes A2+A3 divided into two oval porose areas (A2 and A3). Median pore and postanal porose area absent.

Description

Measurements. Body length 448 (holotype), 415 - 464 (mean 442; six paratypes); body width 315 (holotype), 282 - 332 (mean 312; six paratypes). There are no obvious distinctions between females and males.

Integument (Figs 1, 2, 6, 7). Body colour brown. Body surface microfoveolate, only visible under high magnification. Prodorsum with one transverse and two longitudinal striate bands (s): transverse band located anterior to interlamellar alveoli; longitudinal bands parallel, each located from the transverse band to insertions of lamellar setae. Posterior part of notogaster with two parallel, longitudinal striate bands located from notogastral alveoli p 1 to level to the position of porose areas A3. Between the longitudinal bands are two arcuate bands, which are fused medially. Ventral body side with two lateral, transversal striate bands, which are located between genital and anal plates, and one arcuate striate band, which is located posteriorly to anal plates, extending marginally into the ano-adanal region.

Prodorsum (Figs 1, 3, 6, 9 - 11). Rostrum with strong tooth (t, length 8 - 12). Rostral (ro, 32 - 41) and lamellar (le, 49 - 53) setae setiform, sparsely barbed. Rostral setae usually not visible in dorsal view. Interlamellar setae (in) absent, only their alveoli present. Sensilli long (ss, 143 - 151), setiform, with short cilia unilaterally. A pair of oval porose areas Ad present posterolaterally to interlamellar setae. Lamellar (L) and sublamellar (S) lines distinct, parallel. Exobothridial setae absent.

Notogaster (Figs 1, 4 - 8). Anterior margin of notogaster not developed. Pteromorphs with poorly visible straight wrinkles. Notogastral setae represented by 10 pairs of alveoli. Three pairs of porose areas: Aa weakly transverse oval (16 ×10 - 12); A1 rounded (10 - 12 in diameter); A2+A3 oblong (36 - 41 ×8 - 12), but sometimes divided (asymmetrically in some specimens) into two oval porose areas – A2 (16 × 8 - 10) and A3 (12 ×8 - 10). Median pore absent in all specimens. Lyrifissures im transversely oriented, located lateral to A1.

Gnathosoma. Typical for Pergalumna (for example, see Engelbrecht 1972; Ermilov & Anichkin 2011a, 2011b). Subcapitulum little longer than wide: 106 - 110 × 102. Three pairs of subcapitular setae thin, smooth: a (20) longer than m and h (both 8). Two pairs of adoral setae short (12), hook-like, smooth. Length of palp 73, with standard setation 0 - 2 - 1 - 3 - 9(+ω). Solenidion attached with eupathidium. Length of chelicera 151. Cheliceral setae long, setiform, barbed: cha (41) longer, than chb (28). Trägårdh’ s organ distinct.

Epimeral region (Fig. 2). Several muscle sigilla present. Apodemes 1, 2, sejugal and 3 well visible. Epimeral setal formula: 1 - 0 - 1 - 2. Epimeral setae (1a, 3b, 4a, 4b) short (8 - 10), thin, smooth.

Anogenital region (Figs 2, 7). Six pairs of genital (g 1, g 2, 10 - 12, g 3 - g 6, 8 - 10), one pair of aggenital (ag, 8 - 10), three pairs of adanal (ad 1 - ad 3, 8 - 10) and two pairs of anal (an 1, an 2, 8 - 10) setae thin, smooth. Anterior part of each genital plate with two setae (g 1, g 2). Lyrifissures iad paranal, located close to anal plates. Adanal setae ad 3 inserted laterally to iad. Postanal porose area absent.

Legs. Morphology of leg segments, setae and solenidia typical for Pergalumna (for example, see Engelbrecht 1972; Ermilov & Anichkin 2011a,b). Formulae of leg setation and solenidia:I (1 - 4 - 3 - 4 - 20) [1 - 2 - 2], II (1 - 4 - 3 - 4 - 15) [1 - 1 - 2], III (1 - 2 - 1 - 3 - 15) [1 - 1 - 0], IV (1 - 2 - 2 - 3 - 12) [0 - 1 - 0]; homology of setae and solenidia indicated in Table 1.

Etymology. The new species is named after the country Bolivia, where the material was collected.

Comparison. Pergalumna bolioiana spec. nov. is distinguishable from all species of the genus Pergalumna by the presence of striate bands, which are located on prodorsum, posterior part of the notogaster and the ano-adanal region.

In having the following combination: absence of anterior margin of notogaster and interlamellar setae, long and setiform sensilli, line bands on prodorsum, the morphology of the ventral plate (including presence of line bands and position of setae) and microfoveolate body surface, Pergalumna bolioiana spec. nov. is similar to Pergalumna passimpunctata Balogh & Mahunka, 1969 from Brazil (see Balogh & Mahunka 1969a; also our data), but it differs from the latter by the larger body size (415 - 464 × 282 - 332 in P. bolioiana spec. nov.; 278 × 213 (data of our research) in paratype of P. passimpunctata ), rostrum with tooth (rounded in P. passimpunctata ), longer lamellar setae (shorter in P. passimpunctata ), thick line bands on prodorsum (thin in P. passimpunctata ), presence of line bands on posterior part of notogaster (absent in P. passimpunctata ).

In having the following combination: absence of anterior margin of notogaster and interlamellar setae, setiform sensilli, three pairs of porose areas and pointed rostrum, Pergalumna bolioiana spec. nov. is similar to Pergalumna bifissurata Hammer, 1972 from Polynesia and Galapagos Islands (see Hammer 1972), but it differs from the latter by the presence of specific striate bands (absent in P. bifissurata ), smaller body length (415 - 464 versus 620 in P. bifissurata ), longer sensilli (shorter in P. bifissurata ), oblong porose areas A3 or sometimes divided A3 (oval, not divided in P. bifissurata ) and two pairs of genital setae on anterior parts of genital plates (three in P. bifissurata ).