Atlantodesmus sierwaldae, Bouzan & Iniesta & Brescovit, 2019

Bouzan, Rodrigo Salvador, Iniesta, Luiz Felipe Moretti & Brescovit, Antonio Domingos, 2019, Cladistic analysis and description of a new species of the Brazilian genus Atlantodesmus Hoffman, 2000 (Diplopoda: Polydesmida: Chelodesmidae), European Journal of Taxonomy 538, pp. 1-17 : 7-9

Atlantodesmus sierwaldae sp. nov.

urn:lsid:zoobank.org:act:499BF939-82E7-4191-AD2D-5E3B4240FF1E

Figs 2–4C

Diagnosis

Males differ from all other species of the genus by the following features: paranota and posterior border of the metaterga whitish ( Fig. 2A ); tip of acropodite hood-shaped, covering the solenomere only in mesal view ( Fig. 2C, E ); prefemoral process of the gonopod without serrated margin ( Fig. 2 E−F).

Etymology

The specific epithet is a patronym in honor of Dr. Petra Sierwald, for her friendship and outstanding contributions to our knowledge concerning millipedes.

Material examined

Holotype

BRAZIL • ♂ adult; Minas Gerais, Paracatu ; 17°14′41.6″ S, 46°50′38.0″ W; K. Lenko leg.; IBSP 180 .

Description

Male (holotype)

MEASUREMENTS. Total length: 47.6 mm. Width (body ring 5): 7.2 mm. Collum length 1.3 mm, width 5.5 mm. Antennomeres in mm (1–7): 0.8; 1.5; 1.6; 1.4; 1.3; 1.3; 0.4. Podomeres in mm (1–6): 0.9; 0.9; 2.0; 1.1; 1.1; 1.5. Tarsal claw: 0.3. Gonopod aperture: 1.1 mm length, 1.9 mm width. Telson 1.2 mm.

COLORATION (in 70% ethanol). Head light brown with whitish labral region ( Fig. 2A ). Antennae whitishyellow. Body brown; paranota and posterior margin of metaterga whitish.

BODY RINGS. Integument slightly rough; alignment of paranota curved slightly dorsad; anterior corners rounded, posterior edges acutely produced; ozopores and peritremata situated on the posterior edge of paranota ( Fig. 4C ). Sterna without modifications.

LEGS. Whitish yellow and without modifications, with thin and slightly elongated setae. Gonopod aperture transversely oval; posterior edge excavated and with folds. Telson light brown with whitish apex ( Fig. 2B ); hypocroct triangular, with two setae.

GONOPODS ( Fig. 2 C−F). Gonopod: length 2.22 mm, width 1.79 mm. Coxae: length 0.61 mm, width 0.93 mm. Telopodite: length 1.99 mm, width 0.61 mm. Coxae equivalent to about half the length of telopodite and prominently rounded in ectal view ( Figs 2F , 3C ); with two or three long setae on distal dorsal side and with two or four short setae above cannula; without a spiniform process. Cannula hookshaped (Cn; Figs 2C , 3A ). Prefemoral region ⅓ the size of telopodite; dorsal side with folds. Prefemoral process a long and broad, smooth blade, with the terminal portion expanded, acuminate at apex (PfP; Figs 2 C–F, 3). Conspicuous cingulum present below bases of solenomere and acropodite (C; Figs 2 E–F, 3). Solenomere long and falciform, tapering to acuminate tip; carrying the seminal groove to apical point (S; Figs 2 E–F, 3B–C). Acropodite long, obscuring solenomere in most of its length in ectal view; overreaching the solenomere; hood-shaped. Prefemoral process covering the solenomere in most of its length in mesal view. Acropodite process weakly sclerotized and covering the apical part of the solenomere, in ectal view and also is irregular.

Female

Unknown.

Distribution

The species is known only from the type locality.

Figures

Fig. 2. Atlantodesmus sierwaldae sp. nov., holotype, ♂ (IBSP 180). A. Anterior region in dorsal view. B. Posterior region in dorsal view. C–F. Left gonopod. C. Mesal view. D. Ventral view. E. Ectal view. F. Detail of the distal portion in ectal view. Scale bars: A–B = 2 mm; C–D = 250 µm. E–F = 500 µm.

Fig. 3. Atlantodesmus sierwaldae sp. nov., holotype, ♂ (IBSP 180), schematic drawings of the gonopods. A. Mesal view. B. Ventral view. C. Ectal view. Scale bars: A–B = 250 µm; C = 500 µm.

Fig. 4. Details of the tergites in the genus Atlantodesmus Hoffman, 2000. A. A. pickeli (Schubart, 1946). B. A. pintoi (Schubart, 1946). C. A. sierwaldae sp. nov. D. A. eimeri (Attems, 1898). Scale bars = 2 mm.