Dynatozetes hexaporosus Ermilov, 2017

Dynatozetes hexaporosus Ermilov View in CoL spec. nov.

Figs 1-13 View Figs 1-4 View Figs 5-9 View Figs 10-13

Diagnosis. Body size: 763-863 × 647-697. Rostrum with small, semi-oval protruding. Rostral, lamellar and interlamellar setae long, setiform, barbed, in longest. Bothridial seta lanceolate, barbed. Eight pairs of porose areas present in typical case including six pairs of posteroperipheral areas, Aa elongate oval. Epimeral seta thin, barbed, anogenital seta indistinctly barbed. Leg trochanter IV with elongate triangular process anterodorsally.Dorsal porose area present on leg tarsi I and II.

Description

Measurements. Body length: 763 (holotype: male), 763-863 (four paratypes: two females and five males); notogastral width: 664 (holotype), 647-697 (four paratypes). No clear differences between females and males in the body sizes.

Integument ( Fig. 5 View Figs 5-9 ). Body colour brown to black-brownish. Surface microporose, lateral side of prodorsum densely microgranulate (diameter of granule up to 1). Pteromorph finely striate.

Prodorsum ( Figs 1-3 View Figs 1-4 , 5 View Figs 5-9 ). Rostrum with small, semi-oval protruding (visible in dorso-frontal view). Rostral (rr) and lateral (prl) ridges present. Lamella (lam), sublamella (slam) and tutorium (tu) longer than half of prodorsum.Lamellar (lt) and tutorial (tt) teeth distinctly developed. Small concavity (con) located near lamella. Sublamellar porose area oval (Al, 20- 28× 16-20). Rostral (ro, 110-131), lamellar (le, 110- 131) and interlamellar (in, 266-274) setae setiform, barbed. Exobothridial seta (ex, 41-49) thin, erect, barbed. Bothridial seta (bs, 110-114) with stalk longer than short, lanceolate, barbed head. Dorsophragma (D) slightly elongated longitudinally. Dorsosejugal porose area (Ad) small, oval (12-16× 4-6), located posterior to each interlamellar seta.

Notogaster ( Figs 1, 4-6 View Figs 1-4 View Figs 5-9 ). Eight pairs of porose areas present in typical case, Aa elongate oval (49- 65 ×16-20), longitudinally oriented, A1 rounded (28-41), six pairs of posteroperipheral areas (NN1-6) rounded, of these, the first pair (N1) larger (28-36) than other (10-24). Number of posteroperipheral areas sometimes asymmetric (six or five on one side and five or four on other side, respectively). All lyrifissures (ia, im, ip, ips, ih) and opisthonotal gland opening (gla) clearly visible.

Gnathosoma ( Figs 3 View Figs 1-4 , 7-9 View Figs 5-9 ). Subcapitulum longer than wide (196-204 × 147-161). Subcapitular seta setiform, barbed, h and m (both 53-61) longer than a (28-32). Adoral seta (or 1, or 2, 20-22) thickened, densely ciliate. Palp with length 141-149. Postpalpal seta (ep, 6) spiniform, smooth. Chelicera (217-227) with two barbed setae, cha (69-77) longer than chb (49-53). Trägårdh’ s organ (Tg) elongate triangular.

Epimeral and podosomal regions ( Figs 3 View Figs 1-4 , 5, 6 View Figs 5-9 ). Humeral porose area Am diffuse, elongate oval, Ah clearly bordered, band-like. Pedotecta I (Pd I) and II (Pd II) of typical form. Custodium (cus) strong, elongate triangular. Discidium (dis) triangular. Circumpedal carina (cp) connected to cus. Epimeral setae thin, barbed, 1a, 2a and 3a (24-32) shorter than the others (49-57).

Anogenital region ( Figs 3, 4 View Figs 1-4 , 6 View Figs 5-9 ). Genital (g 1 - g 6, 28-36), aggenital (ag, 28-36), anal (an 1, an 2, 16) and adanal (ad 1 - ad 3, 20) setae setiform, thin, indistinctly barbed (visible under high magnification). Adanal lyrifissure (iad) and marginoventral porose area ( Amar ) well visible.

Legs ( Figs 10-13 View Figs 10-13 ). Median claw thicker than laterals, all serrate on dorsal side; lateral claws each with small tooth ventrodistally. Trochanter IV with elongate triangular process (proc) anterodorsally. Dorsal porose area (p.a.) present on tarsi I and II. Alveoli of tibial and genual solenidia without posterior spine. Formulas of leg setation and solenidia: I (1-5-3-4-20) [1-2-2], II (1-5-3-4-15) [1-1-2], III (2-3-1-3-15) [1-1-0], IV (1-2-2-3-12) [0-1-0]; homology of setae and solenidia indicated in Table 1. Solenidia ω 1 on tarsus I, ω 1 and ω 2 on tarsus II and σ on genu III blunt-ended, other solenidia longer, pointed. Famulus minute, slightly swollen distally, inserted posterior to ω 2.

Material examined. Holotype (male) and four paratypes (two females and two males): see “Material and methods” section.

Type deposition. The holotype is deposited in the collection of the Museo de Historia Natural , Universidad Nacional Mayor de San Marcos, Lima, Peru ; one paratype is deposited in the collection of the Bavarian State Collection of Zoology , Munich, Germany ; one paratype is deposited in the collection of the Senckenberg Institute , Görlitz, Germany ; two paratypes are deposited in the collection of the Tyumen State University Museum of Zoology , Tyumen, Russia .

Etymology. The specific name hexaporosus refers to six pairs of peripheral porose areas on the notogaster.

Remarks. The distinctive characters of the new species from other Dynatozetes species can be found in the identification key given below.