Otostigmus (Parotostigmus) goeldii Brölemann, 1898

Schileyko, Arkady A., 2014, A contribution to the centipede fauna of Venezuela (Chilopoda: Scolopendromorpha), Zootaxa 3821 (1), pp. 151-192 : 181-182

Otostigmus (Parotostigmus) goeldii Brölemann, 1898

Figs 53 , 58–61

Otostigmus (P.) fossulatus: Attems, 1930: 165 ; Otostigmus (P.) goeldii: Attems, 1930: 165 ; Otostigmus (P.) goeldii: Schileyko, 2002: 496 ; Otostigmus goeldii: Chagas, 2012: 18 .

Terra typica: Venezuela, San Esteban. Brazil, Pará.

Material. Venezuela, Aragua [State], [loc.4], [Henri Pittier National Park, Sector] Rancho Grande, leg MGP: 1 ♂, N6, selva nublada, 1200 m, 0 2.1987, N 7076; 1 ♀, N 0 2, 1200, selva nublada, BR, 0 2.1987, N 7200; 1 ♀, Bds, 29.08.1980, N 7199. Miranda [State], [loc.11], N 36, Guatopo, Agua Blanca, 700, bosque humedo tropico, 0 2.1987, 1 ♀, leg MGP, N 7198. 4 specimens in all.

Additional material. Brazil, Amazônas, Manaus, 6♂ + 2♀, NN 6673-6680.

Description of ♂ N 7076. Length of body ca 31 mm (maximal length for this species 45 mm). Color in ethanol: uniformly light-yellow.

Antennae composed of 17 articles, reaching the posterior margin of tergite 4 when reflexed. 2.2–2.3 basal articles with a few long setae both dorsally and ventrally, remaining articles densely pilose. Basal articles cylindrical.

Cephalic plate nearly round in shape, its posterior margin covered by tergite 1 and without sutures.

Second maxillae: article 2 of telopodite distally with dorsal spur. Pretarsus without accessory spines.

Forcipular segment: coxosternite without both median suture and chitin-lines. Tooth-plates somewhat wider than long; each plate with 4 teeth, the lateral tooth is the lower. The basal sutures of the tooth-plates form an obtuse angle. Their lateral ends bifurcate. Trochanteroprefemur with large process, which has one median tubercle; process extending well beyond the tooth-plates ( Fig. 58 ). Tarsungula pointed, normal, their interior surface with two well-developed longitudinal ridges.

Tergites: tergite 2 very short (as long as 1/3 of tergite 1); tergites 1–3 without sutures. Tergites 4–20 with poorly-developed paramedian sutures, which may be somewhat shortened in some anterior tergites; lateral longitudinal sutures absent. Tergites with median and two paramedian, low and poorly-developed longitudinal keels ( Fig. 59 ) between paramedian sutures. Tergal surface slightly rugose. Tergite 21 slightly wider than long, slightly narrowed anteriorly with sides curved and with median depression in the posterior half; its posterior margin obtusely angled. Tergites 7–21 marginate, the margination is better developed in the posterior tergites.

Sternites 5–21 narrowed posteriorly; all sternites without sutures. Sternite 1 very short (0.4 times as long as sternite 2), without visible sulci or depressions. Sternites 3(4)–18(19) with a pair of rounded lateral depressions at mid-length of sternite and two median depressions—a somewhat elongated anterior one and a rounded posterior one; all these depressions are much better developed in mid-body sternites. Ultimate sternite ( Fig. 60 ) nearly as wide as long, distinctly narrowed towards the slightly concave posterior margin, with well-developed median longitudinal depression in the posterior half.

Legs: tibia and tarsus with a few setae; leg 1 with two tarsal spurs, legs 2–19 with one tarsal spur. Tibial and femoral spurs absent; pretarsus of legs 1–20 with two accessory spines.

Coxopleuron (including rudimentary coxopleural process) somewhat longer than sternite 21 ( Fig. 60 ), almost completely covered with scattered coxal pores of various size. Coxopleural process extremely short, rounded apically and spineless. Coxopleural surface without setae; posterior margin of ultimate pleuron straight.

Ultimate legs ca 8.2 mm long (prefemur— 2 mm, femur— 2 mm, tibia— 1.7 mm, tarsus 1 + 2— ca 2.5 mm), rather slender (width of prefemur ca 0.6 mm). All articles cylindrical; prefemur ( Figs 53 , 60 ) without spines, as long as femur and slightly longer than tibia. Tarsal spur absent; pretarsus with two small accessory spines. Prefemur with a very short (ca 0.5 mm), apically rounded digitiform process ( Figs 53 , 60 ). The apical portion of this process is not clavate and has no tuft of hairs.

Range. Brazil: Amazônas, Manaus; Pará, Belém; Bahia, Jequié ; Mimosa [?].

In Venezuela. San Esteban; Aragua State, Henri Pittier National Park, Sector Rancho Grande; Miranda State, Municipio Acevedo, Guatopo National Park.

Remarks. Color and condition of the integument, forcipular teeth, spurs, etc suggest that this specimen is freshly molted; thus characters such as tergal sutures, lateral margination of tergites etc are poorly defined.

The specimens have one tarsal spur at legs 2–19, not at legs 1(2)–9 as Chagas (2012) recorded for Brazilian representatives of this species.

In the studied males of O.(P.) goeldii from Brazilian Amazônas the digitiform process of ultimate legs the same shape as in the Venezuelan specimens ( Fig. 61 ).

Figures

FIGURES 51 – 55. Otostigmus (Parotostigmus) pococki Kraepelin, 1903 51 subadult ♀ N 7201: posterior segments, dorsal view 52 subadult ♀ N 7276: segments 20 – 21, dorsal view; Otostigmus (Parotostigmus) goeldii Brölemann, 1898 53 subadult ♂ N 7076: segment 21 and prefemora of ultimate legs, dorsal view; Otostigmus (Parotostigmus) pococki Kraepelin, 1903 54 subadult ♀ N 7276: cephalic plate and segments 1 – 3, dorsal view 55 subadult ♀ N 7276: forcipular segment and segments 1 – 2, ventral view; (llk) — tergal low longitudinal keels, (utg) — tergite of ultimate leg-bearing segment, (dp) — male digitiform process, (tp) — forcipular tooth-plates, (bs) — basal suture, (ptr) — process of forcipular trochanteroprefemur, (mk) — median keel, (md) — sternal median depression.

FIGURES 56 – 60. Otostigmus (Parotostigmus) pococki Kraepelin, 1903 56 subadult ♀ N 7276: segments 20 – 21 and prefemora of ultimate legs, ventro-lateral 57 subadult ♀ N 7201: forcipular segment and segment 1, ventral view; Otostigmus (Parotostigmus) goeldii Brölemann, 1898 (♂ N 7076) 58 forcipular segment and segment 1, ventral view 59 tergite 19 60 segment 21 and prefemora of ultimate legs, ventro-lateral view; (ust) — sternite of ultimate leg-bearing segment, (cx) — coxopleuron, (up) — prefemur of ultimate legs, (llk) — tergal low longitudinal keel, (tp) — forcipular tooth-plates, (ptr) — process of forcipular trochanteroprefemur, (md) — sternal median depression, (dp) — male digitiform process.

FIGURES 61 – 64. Otostigmus (Parotostigmus) goeldii Brölemann, 1898 (♂ N 6674) 61 anterior half of prefemora of ultimate legs, dorsal view; Cryptops (C.) venezuelae Chamberlin, 1939 (adult N 7360) 62 cephalic plate + segments 1 – 3, dorsal view 63 left ultimate leg, medial view 64 right ultimate leg, medial view; (utg) — tergite of ultimate leg-bearing segment, (dp) — males digitiform process, (tg 1) — tergite 1, (ut 1) — tarsus 1 of ultimate leg, (ut 2) — tarsus 2 of ultimate leg, (ut) — tibia of ultimate leg, (up) — prefemur of ultimate legs, (stu) — saw teeth of ultimate leg, (sup) — spine-like setae of ultimate leg.