Symphylella malagassa, Camacho & Vandenspiegel, 2012

Camacho, Miguel Domínguez & Vandenspiegel, Didier, 2012, Scolopendrellidae (Myriapoda, Symphyla) from the Afrotropics with descriptions of seven new species, European Journal of Taxonomy 32, pp. 1-28 : 13-15

Symphylella malagassa sp. nov.

urn:lsid:zoobank.org:act:C4DFCE1D-B8E1-401C-835A-0C2240AA57AF

Figs 5 , 7E

Type material

Holotype Sex unknown, MADAGASCAR, Foulpointe (17º40’ S, 049º31’ E), coll. Pauly A., 12-17 Dec. 1993 ( MRAC 22157 ).

Paratypes 1♀, same data as holotype ( MRAC 22158 ).

Type locality

MADAGASCAR, Foulpointe (17º 40’ S, 049º 31’ E).

Etymology

The species name is an adjective derived from Madagascar.

Description (holotype)

LENGTH. 2.00 mm.

HEAD. 1.7 times as long as broad with broadest part behind the middle on a level with lateral protuberances ( Fig. 5A ). Lateral margins of head nearly straight. Central rod only distinct in the posterior half. Frontal branches well developed and median branches indistinct. Dorsal surface with short and thin setae, becoming denser in the posterior part. Cuticle with faint and dense pubescence ( Fig. 5B ).

ANTENNAE. Left antenna with 16 segments, right with 17 ( Fig. 5F ). First segment small, 0.4 times the length of 2 nd segment. Following segments with regular size, about 1.2 times as wide as long. Inner setae of the second and third segments straight and longer than the ones of the following segments ( Fig. 5F ). Longest inner seta of the third segment 0.6 times as long as the diameter of segment, while length of the ones in the following segments about 0.3 times the diameter, even shorter in the most distal segments. No second whorl of setae. Apical segment globular, all segments with faint pubescence.

TERGITES ( Figs 5A, E , 7E ). First tergite rudimentary with six setae arranged in two groups of three. Following tergites with quite curved lateral margins and well demarcated curved posterior margins between triangular processes. Processes without end-swelling, tips slightly pointing inwards. One seta between first and second tergites in the median part ( Fig. 5E ). Second tergite with nine posteromarginal, two central and five lateromarginal setae. One seta between apical and inner basal setae on the left triangular process, two on the right one. Anterior margin of second tergite concave. Anterolateral setae longer and well distinct in all anterior tergites. Third tergite with seven-ten lateromarginal and ten posteromarginal setae.

LEGS. First pair of legs strongly reduced to small spiny spots ( Fig. 5C, D ). Last pair of legs with small setae on the whole surface. Tarsus with a longitudinal row of five longer setae on the dorsal side ( Fig. 5H ). Cuticle pubescent.

STYLI. Small, elongate and spike-like, covered by hairs, with a club-like distal process ( Fig. 5G ).

CERCI. 3 times as long as wide, with straight sides ( Fig. 5I ). 25-30 setae in dorsal view. slightly curved and depressed. Cuticle with faint pubescence. Terminal area conical, quite wide, 0.1 times as long as the total length of the cerci, with 8 transversal striae. No apical setae, probably lost in both studied specimens.

Affinities and differential diagnosis

Symphylella malagassa sp. nov. is similar to S. kalundu sp. nov., S. asiatica Scheller, 1971 and S.brincki Scheller,1971 ,since they present six setae on the first tergite and five lateromarginal setae on the second one. S. malagassa sp. nov. differs by the presence of two or three setae between the apical and inner basal setae of the triangular processes instead of one, the higher number of posteromarginal setae on the third tergite and the characteristic curvature of the posterior margin of the tergites. Another remarkable diagnostic feature of this species is the club-like distal end of the styli.

Figures

Fig. 5. Symphylella malagassa sp. nov., holotype (dorsal views) and paratype (ventral and lateral views). A. Head and first 4 tergites (T1, T2, T3, T4), dorsal view. Cr, central rod; fb, frontal branches; lp, lateral protuberances of the head. B. Detail of the surface of the head. C. Detail of the first leg. D. Head and first 2 pairs of legs, ventro-lateral view. E. Detail of first (T1) and second (T2) tergites. Al, anterolateral setae; as, apical setae; cs, central setae of the posterolateral setae; ibs, inner basal setae of the posteromarginal setae; s, seta between first and second tergites. F. Right antenna. Arrows, longer inner setae of second and third segments. G. Stylus of the leg 11. H. Posterior part of the trunk, last pairs of legs and cerci (C), lateral view. Arrows, longer setae of the tarsus (t) of last left leg. I. Last tergite and cerci (C), dorsal view. Ta, terminal area.

Fig. 7. Schemata of the three first tergites and chaetotaxy of the described species of Symphylella. A. S. erecta sp. nov. B. S. fuko sp. nov. C. S. kalundu sp. nov. D. S. lubumbashi sp. nov. E. S. malagassa sp. nov. F. S. tanganyika sp. nov. — Marginal setae of second and third tergites labelled: lm, lateromarginal setae; lm (al), anterolateral seta of lateromarginal; p, posteromarginal setae; p(a), apical setae – belonging to the posteromarginal setae; p(c), central setae of posteromarginal; p(ib), inner basal setae of posteromarginal; s, seta between first and second tergites. Scale: 50 μm.