Maurieseuma nontronense ( Mauriès & Kime, 1999 ), Antić & Spelda, 2022

Antić, Dragan & Spelda, Jörg, 2022, Maurieseuma, a new genus to accommodate Hylebainosoma nontronense Mauriès & Kime, 1999, and the revalidation of the genus Romanosoma Mauriès, 2015 (Diplopoda: Chordeumatida: Haaseidae), Zootaxa 5219 (2), pp. 193-200 : 195-198

Maurieseuma nontronense ( Mauriès & Kime, 1999) gen. nov., comb. nov.

Figs 1 , 2

Hylebainosoma (?) nontronensis (sic!) Mauriès & Kime, 1999: 371–373, fig. 2, table 2.

Hylebainosoma nontronensis (sic!) — Tajovský et al. (2014: 502, 516–521, fig. 39, table 1); Telfer et al. (2015: 22–29, figs 5–9, table 2).

Hylebainosoma nontronense — Kime & Enghoff (2021: 111 , 221, map 385).

Diagnosis. As for the monospecific genus.

Name. Mauriès & Kime (1999) named the species after Nontron, the region where it was discovered.

Material examined. 1 ♂ ( IZB, JSP200701-001 ) , 3 ♀♀ ( IZB, JSP200701-002 ) , 6 ♂♂ ( JSC, JSP130413-059 - 060 -061 -062, JSP141223-001 ) , 8 ♀♀ ( JSC, JSP130413-063 - 064 -065 ); FRANCE, Corrèze , Brive-la-Gaillarde, N Donzenac, 236 m a.l.s., 45.235°N, 1.5454°W; 22.10.2009; leg. A. Schönhofer. 3 ♂♂ ( IZB, JSP150101-004 ; JSC, -002 -003); UK, Wales, Cefn Forest , N Blackwood, 51.697°N, 3.2044°W; 02.10.2014; leg. C. Owen. 3 ♂♂ ( ZSM, GBOL11814 , GBOL12287 ; JSC, JSP141209-036 ) , 1 ♀ ( JSC, JSP141209-033 ); UK, Wales, Groesfaen Woods , 51.701°N, 3.2559°W; 25.11.2014; leg. C. Owen. 2 ♂♂ ( ZSM, GBOL11812 ; JSC, JSP141209-024 ) , 2 ♀ ( ZSM, GBOL12284 ; JSC, JSP141209-026 ); UK, Wales, Cwm Kendon Woods , 51.682°N, 3.1527°W; 25.11.2014; leg. C. Owen. 2 ♂♂ ( ZSM, GBOL11813 , GBOL12285 ); UK, Wales, Coed-y-moeth Comnon , 51.704°N, 3.2187°W; 26.11.2014; leg. C. Owen. 2 ♀♀ ( ZSM, GBOL12286 , GBOL12344 ); UK, Wales, Newbridge , 51.661°N, 3.1571°W; 27.11.2014; leg. C. Owen.

Description. Medium-sized haaseid, with body length ca 8–10 mm, and with 30 rings (including telson) in adults. Colour yellowish-brown patterns, ommatidia black ( Fig. 1A ). Head with frontal side slightly concave in males ( Fig. 1B ), convex in females ( Fig. 1C ), with 12–14 ommatidia arranged in triangle. Antennae elongated, slender, with dorsomedial and ventromedial lines of small papillae-like outgrowths. Body rings with dorsolateral humps, bearing stout, long and trichoid macrochaetae ( Haasea type sensu Spelda 2015). Leg-pairs 1 and 2 (typically reduced in size) in both sexes with tarsal combs, femora with several long and robust setae; postfemora and tibiae each with several long and robust setae arranged in a group ( Fig. 1D ).

Males. Pregonopodal legs 3–6 enlarged, leg 7 only slightly enlarged ( Fig. 1A, B ). Tarsal papillae present only in distal halves of legs 3–7. Postgonopodal legs (including legs 10 and 11) without tarsal papillae. Leg-pair 10 reduced in size compared to other legs, without incrassate podomeres of telopodite; coxae enlarged, each with coxal sac and a prominent distal process directed mesad, with a single seta and nipples ( Fig. 1B, F ). Leg-pair 11 slightly reduced in size compared to other walking legs; with coxal sacs; no other peculiarities.

Anterior gonopods ( Figs 1G, H , 2A, B ). Sternum ( s) wide, with medial sternal process ( msp) and three groups of setae on each half: anterior, lateral and anterolateral (similar to Tajovský et al. 2014: cf. figs 22, 27). Medial sternal process laterally flattened, rather sigmoid, directed anteriad, half the size of angiocoxites. Angiocoxites ( a) robust, oriented rather anteriad, with several structures. In mesal view each angiocoxite with posteroproximal papillated cone ( pc) partially covered with papillae-like outgrowths. Similar field with papillae-like outgrowths present anteriorly to pc. Mesal process ( mp) long, acuminate, sabre-like or slightly sigmoid, similar in height as the other parts. Posterior lateral process ( plp) rises from the posteroproximal shoulder completely straight up to half its length, and then abruptly bends anteriad at an angle of ca. 110°, distally bifurcated. Anterodistal part of angiocoxite ( dp) massive, long, spoon-shaped, distally enclosed with fimbriae- and finger-like outgrowths, at the base of them slightly thickened. At base of the dp a complex structure with “seminal” opening ( so) and numerous fimbriaelike outgrowths present. A “seminal” canal ( sc) and “seminal” chamber ( sch) visible. Unclear if posterior lamella present. Colpocoxites [= Opuntia -like membranous lobe sensu Antić & Akkari (2020)] with two lobes, smaller anterior one ( cc1) and larger posterior one ( cc2) digitiform in mesal and rather subtriangular in posterior view, both covered by spicule-like outgrowths.

Posterior gonopods ( Fig. 1I ). Sternum reduced. Telopodite ( t) 2-segmented, podomere 1 strongly developed with long setae distally, podomere 2 short, almost as long as its radius. Coxal process ( cp) strongly developed, but apparently lower than telopodite, proximally with mesal bulge ( b), distally wide with a posterior flange with teeth of variable appearance.

Females. Leg-pair 3 reduced to sternum and one podomere ( Fig. 1C–E ); possibly with protective function. Vulvae merged posterobasally ( Figs 1D , 2C ); operculum ( o) with lateral and mesal groups of setae (mainly 3+3) which are smaller in size than the setae of the bursa; lateral valve ( lv) of bursa well-developed, with a bulge at the base, covered with numerous spicule-like outgrowths, nipples and long setae; mesal valve ( mv) posteriorly with two ridges, of which mesal one covered with spicule-like outgrowths, nipples and long setae. Inside the bursa several ampullae ( am). Without postgenital plate.

Distribution. Known from the Massif Central in France and South Wales in UK ( Kime & Enghoff 2021; Telfer et al. 2015).

Figures

FIGURE 1. Maurieseuma nontronense (Mauriès & Kime, 1999) gen. nov., comb. nov. A. Living male from Wales, UK (photo J.P. Richards, www.flickr.com/invertimages, not taken to scale). B–I. Males [JSC, JSP130413-060 (G, I), -061 (B); JSP141223- 001 (F, H)] and females [JSC, JSP130413-063 (E), -064 (C, D)] from Brive-la-Gaillarde, France. B. Male, anterior part of body, lateral view. C. Female, anterior part of body, lateral view, arrow indicates leg-pair 3. D. Leg-pairs 2, 3 and vulvae, posterior, anterior and posteroventral views, respectively. E. Leg-pair 3 in female, posterior view. F. Left leg 10 in male, anterior view. G. Anterior gonopods, posterior view. H. Left anterior gonopod, mesal view. I. Posterior gonopods, posterior view. Abbreviations: a: angiocoxite; am: ampullae; b: mesal bulge; cc1, cc2: lobes of colpocoxite; cp: coxal process; dp: anterodistal part; lv: lateral valve; mp: mesal process; msp: medial sternal process; mv: mesal valve; o: operculum; pc: papillated cone; plp: posterior lateral process; s: sternum; sc: “seminal” canal; sch: “seminal” chamber; t: telopodite. Scale bars: 1 mm (B, C) and 0.1 mm (D–I).

FIGURE 2. Maurieseuma nontronense (Mauriès & Kime, 1999) gen. nov., comb. nov., male and female from Brive-la- Gaillarde, France (IZB, JSP200701-001, -002). A. Left anterior gonopod, lateral view. B. Left anterior gonopod, mesal view. C. Vulvae, posterior view. Abbreviations: a: angiocoxite; cc1, cc2: lobes of colpocoxite; dp: anterodistal part; lv: lateral valve; mp: mesal process; mv: mesal valve; o: operculum; pc: papillated cone; plp: posterior lateral process; s: sternum; sc: “seminal” canal; so: “seminal” opening. Scale bar: 0.3 mm.