Eucampesmella lalla, Bouzan & Iniesta & Pena-Barbosa & Brescovit, 2021

Bouzan, Rodrigo S., Iniesta, Luiz Felipe M., Pena-Barbosa, João Paulo P. & Brescovit, Antonio D., 2021, Six new species of the widespread Brazilian millipede genus Eucampesmella (Polydesmida: Chelodesmidae), Zoologia (e 66300) 38, pp. 1-22 : 16-19

Eucampesmella lalla sp. nov.

Figs 61−65, 67

http://zoobank.org/ A76EE763-F0B6-491E-8B70-FDDC52520759

Diagnosis. Males of Eucampesmella lalla sp. nov. differ from all other species of the genus by the prefemoral process with a small lateral spine on the middle region of the process ( Figs 61, 62). Just above the median region of the prefemoral process, on the inner margin, there is an irregular zone with some indentations ( Fig. 61).

Type material. Holotype: Male from Parque das Dunas (5°50’03”S; 35°11’25”W), Natal , Rio Grande do Norte, Brazil, 02.II.2002, Fernando coll. ( IBSP 1378 ) . Paratypes: One female from the same date and locality ( IBSP 1378 ) .

Description. Male (Holotype, IBSP 1378). Coloration (long-preserved in 70% ethanol): Head ocher. Antennae yellow-

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ish white. Body brown and paranota tip yellowish. Body rings: cuticle rough; paranota rounded; ozopore central-posteriorly situated on paranota; peritremata slightly pronounced on the paranota. Stigma oval. Sternite of body ring 4 with one pair of projections; Sternite of body ring 5 with two pairs of projections, the former ones are larger and rounded-shaped, the latter ones are triangular; Sternite of body ring 6 with two pairs of small triangular projections in the base of the coxae; post-gonopodal sternites with two pairs triangular projections; Sternite until the body ring 9 with the anterior zone between the coxae showing a cluster of small setae. Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds, in anal view the posterior projecting margin is rounded. Legs yellowish, with a dorsal lobe on the prefemur and tibia, some legs with granules. Telson brown with the posterior margin whitish.

Total length: 61.16. Width total: 10.34. Antennomere lengths (1>7): 0.67; 1.80; 1.36; 1.43; 1.64; 1.33; 0.22. Podomeres lengths (1>7): 0.65; 1.46; 2.45; 1.34; 1.55; 1.56; 0.48. Gonopod aperture, long 2.60, width 4.57. Telson, long 1.00. Gonopod: long 3.93, width 3.90. Coxae: long 1.88, width 2.94. Telopodite: long 3.67, width 1.77.

Gonopods ( Figs 61−63): coxae equivalent to about the length of the telopodite and prominent digitiform (= rectangular, with rounded corners) in ectal view ( Fig. 63). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of the telopodite; ending in a well-demarcated transition zone. Prefemoral process long, slightly exceeding the length of the acropodite; broad, in dorsal view; indentation border is present in the sub-apical portion on the external margin of the process; a small spine-shaped secondary process arises in the medial portion (PfP; Figs 61, 62). Acropodite elongated, robust and broad; apical portion divided; Solenomere conducting the prostatic groove that opens on a conspicuous acute projection; solenomere robust and rounded shaped (S; Figs 61−63); Acropodital process more slender than the solenomere, sub-oval in ventral view (AP; Figs 61−63).

Female (Paratype, IBSP 1378). Head and body dark brown, paranota tip yellowish. Posterior margin of vulvae opening presenting a small dome-shaped epigyne. Vulvae ( Fig. 64) elongated; not straight (=curved to the external side; “C-shaped”). Total length: 63.14. Width total: 9.28. Posterior margin of the vulvae aperture: 2, 93 width. Vulvae: long 1.93, width 1.15. External valve: long 1.91, width 0.86. Internal valve: long 1.49, width 0.69. Operculum: long 0.28, width 0.46. Latero-posterior margin of the both valves with long setae and densely setose, central setae shorter and scattered; a depression occurs along all the central portion of both valves ( Fig. 65). Operculum small (OP, Figs 64, 65).

Distribution. Only known for the type locality ( Fig. 67).

Etymology. The species epithet is taken as a noun in apposition honoring the chilopodologist Laura Del Latte, nicknamed “Lalla ”, for her contributions to science and a very important person in life for the third author.

Incertae sedis Species