Pseudonannolene saguassu Iniesta & Ferreira 2013
Creators: name: Iniesta, Luiz Felipe Moretti
name: Ferreira, Rodrigo Lopes
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Spirostreptida
Pseudonannolenidae
Pseudonannolene
Pseudonannolene saguassu

description: Pseudonannolene saguassu Iniesta & Ferreira, 2013.
(Figs. 7–10)
Material examined: Holotype: 1 Male (Fragmented, ISLA 2266), from Gruta do Éden, Pains/MG, Brazil, 15/III/ 2012.
Etimology. Saguassu (saguaçú) comes from the Tupi-Grarani origin (Brazilian Indian languages), meaning “those with big eyes”. This name obviously refers to the numerous ocelli observed in this species. It is to be treated as a noun in apposition.
Diagnosis. Body with 69 rings and brownish coloration. About 45 Ocelli, pigmented. 30 labral setae and mandible with 11 pectinate lamellae. Gonopod with rhomboid solonomere and a central spine. Basal section 0.75 times longer than wide and distal section about 0.5 times longer than wide.
Measurements: Length of 65.16 mm; maximum midbody diameter of 3.68 mm; 69 body rings; length of antennae of 3.67 mm (relation to diameter 0.99); length of legs 2.60 mm (relation to diameter 0.71); length of tarsal claw 0.2 mm (relation to diameter 0.05).
Color: Brownish.
Description of adults. Head (Fig. 7): Head glabrous and pigmented. Three small labral teeth, a row of 30 labral setae and above a row of 6 supra labral setae (one apparently missing). Mandibles pigmented, glabrous and with 2 external teeth above, 5 internal teeth and 11 pectinate lamellae. Eyes pigmented with 45 ocelli, distributed into 5–6 rows. Antennae pigmented and densely setose. First antennomere small, second and third antennomeres of similar sizes, fourth and fifth antennomeres shorter than third. Sixth antennomere longer and wider than the fourth and fifth. Groups of basiconic sensilla on the edge of the fifth and sixth antennomeres. Four terminal sensory cones.
Gnathochilarium (Fig. 8 A; B): Gula (Gu) with short setae. Mentum (Me) rounded and with base wider than the latter. Stipes (St) with base shorter than distal region. Promentum (Pme) with two trianguliform parts and Laminae linguales (Ll) entirely separated by Pme.
Trunk: Body with 69 rings. Tergites and collum pigmented (homogeneously brownish). Lateral transverse striae present (striae variables into individuals). Anal shield and anal valve pigmented like the trunk.
First male pair of legs (Fig. 9 A): The first leg pair is modified and densely setose. Coxae (Cx) with basis longer than distal region. Distal region with a shoulder. Sternum not visible. Prefemur (Prf) with thin oral process parallel (P) to the coxa, more rounded in distal (Fig. 9 B). Post-femur (Psf) and tíbia (Tb) reduced. Femur (F) elongated. Terminal claw (Tc) not modified.
Gonopod (Fig. 10 A; B): Gonopod short and stout. Coxae (Cx) little visible and glabrous. The basal section (Bs) of telopodite glabrous, 0.75 times longer than wide. Shoulder absent. Basiconic sensilla (B) extending along the membranous margin from basal section. Distal section (Ds) about 0.5 times longer than width and with two well-developed processes, the solenomere (S) and an internal (seminal) branch (Ib). S rhomboid and with a squamous surface coating the structure. Spine (Sp) present in center of the apex. Ib (coxosternal branch?) digitiform and supporting setae at distal region that exceeds the length of S. Short seminal groove (Sg) between S and Ib.
Remarks. Morphological analysis was performed by stereoscopic observations and light microscopy in a single male specimen. The specimen was found in an area between the twilight and aphotic zones of Gruta do Éden, near the vertical entrance (Fig. 1 B). In the same cave, there is a huge population of P. ambuatinga, which is distributed especially in the main conduit of the cave, however, cut by a stream. Accordingly, this cave represents the first case of syntopic species of Pseudonannolene occurring in Brazilian caves. However, it is very likely that P. saguassu actually represents an “accidental” species, since only a single specimen was found during many visits paid to the cave. Since the external (epigean) environment was not properly sampled, it is plausible to assume that the main habitat of this species is the external semi-deciduous forest which covers the area. Therefore, it is not possible to consider the species as “rare” based on the fact that only a single specimen was collected.
description: Published as part of Iniesta, Luiz Felipe Moretti & Ferreira, Rodrigo Lopes, 2013, Two new species of Pseudonannolene Silvestri, 1895 from Brazilian limestone caves (Spirostreptida: Pseudonannolenidae): synotopy of a troglophilic and a troglobiotic species, pp. 357-369 in Zootaxa 3702 (4) on pages 363-364, DOI: 10.11646/zootaxa.3702.4.3, http://zenodo.org/record/217312