Physetoparia complexa, Golovatch, Sergei I., Fiemapong, Armand Richard Nzoko & VandenSpiegel, Didier, 2019
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publication ID |
https://dx.doi.org/10.3897/zookeys.891.46986 |
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publication LSID |
lsid:zoobank.org:pub:4B0C5A33-87F4-4B20-B837-6723C0BEA8B2 |
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persistent identifier |
https://treatment.plazi.org/id/CD6F8805-CC23-5696-8EFD-57222950177C |
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treatment provided by |
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scientific name |
Physetoparia complexa |
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sp. nov. |
Physetoparia complexa sp. nov. Figs 1A View Figure 1 , 2 View Figure 2 , 3 View Figure 3
Type material.
Holotype ♂ (MRAC 22840), Guinea, Nimba Mountains, summit of Mount Nion, ca 1405 m a.s.l., forest litter, 28.V.2019, A. Henrard, D. VandenSpiegel, C. Allard et al. leg. (Nimba 2019-24). Paratypes: 1 ♂ (MRAC 22841), 9 ♀ (MRAC 22852), 1 ♂ (SEM, MRAC 22842), same locality and date, together with holotype.
Diagnosis.
Differs from all other species of the genus by the unusually complex gonopodal structure, i.e. the presence of a particularly prominent, distolateral, gonocoxal lobe (lo) that protects a similarly clearly exposed telopodite, the latter being largely represented by a high apicomesal lobe/outgrowth (ab) that carries a highly peculiar, large, tube-shaped solenomere (tu). The gonocoel is shallow and conceals only the bases of the telopodites ( Figs 2K View Figure 2 , 3 View Figure 3 ).
Name.
To emphasize the complex gonopodal structure; adjective in feminine gender.
Description.
Length of holotype ca 5 mm (♂), width of midbody pro- and metazonae 0.5 and 0.7 mm (♂), respectively. Length of paratypes ca 5 mm (♂) or 6-7 mm (♀), width of midbody pro- and metazonae 0.5 and 0.7 mm (♂) or 0.6-0.7 and 0.8-1.0 mm (♀), respectively. Coloration in alcohol marbled light or darker reddish brown, venter and legs light brown to nearly pallid ( Fig. 1A View Figure 1 ).
Body with 20 segments in both sexes. Tegument very delicately micro-alveolate, mainly slightly shining. Head densely micropilose, devoid of epicranial modifications ( Fig. 2A, B, E View Figure 2 ). Interantennal isthmus almost two times diameter of antennal socket. Antennae long and strongly clavate, reaching back past segment 3 when stretched dorsally. In length, antennomere 3 = 6> 2 = 5> 1 = 4 =7; antennomere 6 the largest, antennomeres 5 and 6 each with a distinct, round, distodorsal field of sensilla. In width, collum <head <segments 2-4 <5-16; thereafter body gradually tapering towards telson. Collum ellipsoid, transversely oval, like all following metaterga with three transverse, regular rows of setae on low, but evident, setigerous bosses. Tergal setae medium-sized, each ca 1/4-1/5 as long as metatergum, bacilliform and longitudinally ribbed, gradually growing longer towards telson, set on minute knobs ( Fig. 2 A–J View Figure 2 ), always 3+3 in each row on postcollum metaterga; 2-3 additional setae normally present at lateral margin of paraterga. A faint, sinuate, transverse sulcus visible behind first row on most metaterga. Dorsum invariably regularly convex. Paraterga medium-sized, set at around upper 1/3 of metazonae ( Fig. 2 A–H View Figure 2 ), visible starting with collum, often slightly upturned caudally, faintly, but regularly rounded and bordered, lateral incisions almost absent. Caudal corner of paraterga mostly rounded, sharply truncate only in a few caudal segments ( Fig. 2D, G View Figure 2 ). Pore formula normal: 5, 7, 9, 10, 12, 13, 15-19. Ozopores small, round, opening flush dorsally near caudal corner of poriferous paraterga. Stricture between pro- and metazonae wide, shallow. Limbus very finely microspiculate. All spiracles usual, simple. Pleurosternal carinae traceable as very faint lines on most segments ( Fig. 2B, D View Figure 2 ). Epiproct short, conical, flattened dorsoventrally. Hypoproct semi-circular, setae strongly separated and borne on minute knobs.
Sterna wide, unmodified, setose. Legs rather long and slender, ca 1.2-1.3 (♂) or 1.0-1.1 (♀) times as long as midbody height; in length, tarsus> femur> prefemur> coxa = postfemur = tibia, the latter with a particularly long, tactile seta apicodorsally. Tarsal brushes absent.
Gonopods ( Fig. 3 View Figure 3 ) with large, subglobose, barely setose coxae, fused medially at base, each coxa carrying a very prominent, rounded, distolateral lobe (lo) and two very strong setae near place of fusion. Telopodites very clearly exposed, but strongly protected by lo, bases only a little concealed inside a shallow gonocoel. Telopodites only slightly shorter than lo, each with only a single, large, subsecuriform, lobe-shaped, apicomesal branch/outgrowth (ab) showing a microdentate apical margin, a peculiar tube (tu) with a large orifice (or), and a field of fimbriae at base of tu, both hidden between lo and ap; tu apparently functioning as a solenomere.
Remarks.
This new species shows several clear-cut apomorphies in gonopodal characters (see Diagnosis above), but on balance it fits quite well the scope of Physetoparia as outlined by Golovatch et al. (2018). Especially distinct similarities concern the sole congener that has a marked apicolateral outgrowth/lobe on the gonopodal coxa to protect a likewise well exposed telopodite: P. villiersi (Schubart, 1955). However, the gonotelopodite in the latter species is tripartite, including a finger-shaped solenomere, while the coxal lobe is much smaller and less conspicuous ( Schubart 1955). In addition, both these species compared come from the same area, the Nimba Mountains which are shared by Liberia, Guinea and Côte d’Ivoire.
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