Globopactes hispidus, Schmidt, 2007

Schmidt, Christian, 2007, Revision of the Neotropical Scleropactidae (Crustacea: Oniscidea), Zoological Journal of the Linnean Society 151, pp. 1-339 : 51-52

GLOBOPACTES HISPIDUS SP. NOV.

Material examined

Types: ♂ holotype and one ♀ m paratype ( Venezuela, Andes , east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV) .

Description ( Figs 135–140 )

Male 6.8 × 3.1 mm, cephalothorax 1.43 mm wide; female 7.0 × 3.2 mm, cephalothorax 1.52 mm wide.

Dorsum with light brown and pale areas. On the coxal plates, some chromatophores form a reticulate pattern. Pereiopods also with brown reticulate pigment. Second antenna brown, distal half of fifth peduncular article and proximal flagellar article white. Tergites with shallow tubercles, each bearing a strong, stick-like scale seta. Noduli laterales could not be seen; presumably, they are similar to or smaller than the scale setae.

Endoantennal conglobation ability. Cephalothorax with lateral lobes about half as long as the eyes, not distinctly delimited. Frontal shield convex between the antennae, in dorsal view slightly arcuate. In frontal view, linea frontalis weakly convex, corners of lateral lobes forming almost right angles. In frontal view, two cavities above the insertions of the second antennae are delimited by elevated areas along the upper margin and between them.

First antenna triarticulate, second article shortest. Distal article with sharp, acute tip, two large, subapical aesthetascs and approximately seven slightly smaller aesthetascs on the frontal face. Second antenna with triarticulate flagellum; apical cone 1.5 times as long as the distal article. Second and third articles with a transverse row of two aesthetascs.

Left mandible with pars incisiva of four cusps, large lacinia mobilis with two large cusps and one small cusp, hairy lobe with two hairy setae, one single hairy seta immediately adjacent to the hairy lobe. Pars molaris represented by a tuft of hairy setae. Right mandible with pars incisiva of four blunt cusps and smaller, conical lacinia mobilis, hairy lobe with one hairy seta, one single hairy seta between hairy lobe and pars molaris. The latter represented by a tuft of hairy setae. Both mandibles on the outer face with some setae and scales. First maxilla lateral endite on distal margin with lateral group of four strong, simple tooth setae, a triangular lobe, which is about half as long as the adjacent tooth seta, a slender seta, and an inner group of six more slender teeth, five of them distally cleft. Two small subapical seta on caudal face beside inner group. Distal third of lateral margin densely fringed with hairs (pectinate scales). Mesal endite bearing two slender penicils; there is no distinct corner laterally of penicils. Second maxilla distally bilobate, lobes subequal. Both lobes hairy, mesal lobe with group of sensilla on frontal face, near the margin, and two small setae between the lobes (?). Maxilliped base distinctly scaly in the basal and lateral parts, epipodite without hairs. Endite approximately rectangular, longer than wide, distal part

KEY TO THE SPECIES OF GLOBOPACTES

1. Coxal plates 2 and 3 with strongly concave lateral margins.............................................2

1.* All coxal plates with convex lateral margins, as usual.................................................4

2. Male pereiopods 1–3 merus and carpus with ventral field of scales; tergites smooth, coloured dark and light brown; 7–9 mm; frontal shield various.....................................................................3

2.* Male pereiopods 1–2 merus and carpus with ventral field of scales; juveniles distinctly hirsute, immatures distinctly granulate; tergites red with black and yellow patches; 12–15 mm; frontal shield less appressed to vertex, i.e. the transverse furrow is more exposed................................. Globopactes granulatus ( Dollfus, 1893)

3. Frontal shield more appressed to the vertex, its median part even............. Globopactes falconensis sp. nov.

3.* Frontal shield less appressed to vertex, with transverse furrow forming deep grooves laterally, median part of frontal shield strongly concave........................................... Globopactes senex ( Budde-Lund, 1893)

4. Tergites with shallow tubercles bearing strong upright scale-setae............... Globopactes hispidus sp. nov.

4.* Tergites smooth.................................................................................5

5. Pereiopods pale. Second antenna: distal half of fifth article and flagellum pale. Male pleopod 1 exopodite broader than long, distally truncate................................... Globopactes talamancensis ( Leistikow, 1997)

5.* Pereiopods pigmented. Second antenna: entire fifth article dark, flagellum pale. Male pleopod 1 exopodite approximately as long as broad, of roughly triangular shape........................... Globopactes meridae sp. nov.

covered with acute scales; one penicil near mediodistal corner, on frontal face. A very small knob (probably homologous with a seta) in a more proximal position, also on frontal face. One seta on caudal face of endite, difficult to see among the hairs (scales). Maxilliped palp proximal article bearing one large seta, in a mesal position. Second article with proximal tuft of three small setae, distal tuft of equal setae on a long socket, two equally sized setae beside the socket. On lateral margin of second article, one broad seta and one slender seta. Distal article with apical tuft of> 20 equal setae and four setae on lateral margin. A longitudinal ridge on frontal face is not present.

Pereiopod 1 carpus with oblique brush of long, hairlike scales. Distal margin formed by a transverse row of tongue-shaped, hyaline scales. Propodus only with large scale-field. Male pereiopods with frontoventral scale-fields on ischium, merus and carpus of pereiopods 1 and 2, and on merus and carpus of pereiopod 3. Male pereiopod 7 ischium with very weakly concave, almost straight, ventral margin fringed with scales. Merus 7 with ventrocaudal tubercle in a proximal position. Distal of this tubercle a deep excavation; The tubercle is not seen in strictly frontal view. On pereiopod 7 basis, no traces of a water-conducting structure could be found. Pereiopod dactyli with large outer claw, long inner claw, dactylar seta apically double fringed, curved ungual seta with smaller seta beside it, one small seta on frontal face and on caudal face, and some scales. Proximal of dactylar seta there are two aesthetasc-like setae.

Male pleopod 1 exopodite rounded-triangular, wider than long, without any marginal setae. Endopodite 1 with straight distal part and a row of 26 (in holotype) small setae along the spermatic furrow on the caudal/ dorsal side. Male pleopod 2 exopodite with two or three marginal setae and some pectinate scales along the inner margin. Endopodite 2 slightly longer than exopodite. Pleopods 3–5 expodites with some marginal setae, sympodites with long, acute and hairy tip at the mesal margin. Male pleopod 5 exopodite with indistinct angle bearing one seta on the lateral margin, a furrow along the mesal margin, and a transverse band of several rows of pectinate scales on the caudal face. Lateral respiratory field on dorsal face of pleopod exopodite 1 and indistinct lateral (respiratory?) fields on exopodites 2–5. Uropod sympodites probably with some gland pores on the dorsal face (could not be seen with certainty). Endopodite as long as sympodite; exopodite distally projecting beyond endopodite.

Habitat

Moist forest on the east slope of the Andes, 1500 m altitude. In leaf litter.

Derivation of the name

From Latin hispidus (spiny), because of the spine-like dorsal scale setae.

Figures

Figure 135. Globopactes hispidus sp. nov.: ♀m paratype, 7.0 × 3.2 mm, cephalothorax 1.52 mm wide, habitus lateral, pleon dorsal; ♂ holotype, 6.8 × 3.1 mm, cephalothorax 1.43 mm wide, cephalothorax lateral, dorsal and frontal (Venezuela, Andes, east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV).

Figure 136. Globopactes hispidus sp. nov.: ♂ holotype, 6.8 × 3.1 mm, cephalothorax 1.43 mm wide, mouthparts, first antenna (Venezuela, Andes, east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV).

Figure 137. Globopactes hispidus sp. nov.: ♂ holotype, 6.8 × 3.1 mm, cephalothorax 1.43 mm wide, pereiopods 1–3, uropods (Venezuela, Andes, east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV).

Figure 138. Globopactes hispidus sp. nov.: ♂ holotype, 6.8 × 3.1 mm, cephalothorax 1.43 mm wide, pereiopods 4–6, pereiopod 4 dactylus frontal, pereiopod 5 dactylus caudal (Venezuela, Andes, east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV).

Figure 139. Globopactes hispidus sp. nov.: ♂ holotype, 6.8 × 3.1 mm, cephalothorax 1.43 mm wide, pereiopod 7 frontal and ventral, second antenna (Venezuela, Andes, east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV).

Figure 140. Globopactes hispidus sp. nov.: ♂ holotype, 6.8 × 3.1 mm, cephalothorax 1.43 mm wide, pleopods (Venezuela, Andes, east slope, 8°51′55″ N, 70°37′08″ W, altitude c. 1500 m, moist forest, in leaf litter, leg. C. Schmidt, 24 March 1998, UCV).