Calyptomastix zoltani, Enghoff, 2022

Enghoff, Henrik, 2022, Mountains of millipedes. The family Odontopygidae in the Eastern Arc Mountains of Tanzania (Diplopoda, Spirostreptida), European Journal of Taxonomy 803, pp. 1-136 : 34-38

Calyptomastix zoltani sp. nov.

urn:lsid:zoobank.org:act:0D11205E-FB5A-4B27-8EE7-84695DA3B932

Figs 21–23

Diagnosis

Differs from other species of Calyptomastix by the combination of having a post-torsal spine (= postfemoral spine of Hoffman & Howell 2012) and having the lateral metaplical process reduced to a short, blunt bump.

Etymology

After Zoltán Korsós, Hungarian myriapodologist, former resident of ‘Hotel Dolichoiulus’.

Material examined (total 3 ♂♂, 1 ♀)

Holotype TANZANIA • ♂; West Usambara Mts , Mazumbai FR , loc. V; Nov. 1990; T. Andersen leg.; pitfall trap; NHMD 621719 .

Paratypes TANZANIA • 1 ♂ (right gonopod lost); E Usambara Mts, Amani, Monga; ca 1000 m a.s.l.; 5 Aug. 1974; I.B. and H. Enghoff leg.; NHMD 621720 • 1 ♂; West Usambara Mountains , Mazumbai; 1600 m a.s.l.; 1 Aug. 1980; M. Stoltze and N. Scharff leg.; in log; NHMD 621721 .

Referred non-type material

TANZANIA • 1 ♀; West Usambara Mountains , Mazumbai; 1600 m a.s.l.; 1 Aug. 1980; M. Stoltze and N. Scharff leg.; in log; NHMD 621722 .

Description (male)

SIZE. Length 33–36 mm, diameter 1.7–2.0 mm, 57–62 podous rings, no apodous rings in front of telson.

COLOUR. After 30–43 years in alcohol faded, but with a broad dorsal pale stripe.

SUPRALABRAL SETAE. 5–6.

MANDIBULAR STIPES. Subquadratic, distal margin very shallowly concave.

ANAL VALVES. With small dorsal spine, and marked ventral ‘corner’; margins raised, each with three(- four) setae on poorly developed ravelins, ravelins slightly protruding in lateral view. Central seta of right valve duplicated.

LIMBUS ( Fig. 21D ). Margin with triangular, weakly striate lobes, one stronger ridge running into each lobe.

LEGS. Smallest specimen (from Amani) without ventral pads, specimens from Mazumbai with poorly developed ventral pads on prefemur and tibia of anterior postgonopodal legs.

FIRST PAIR OF LEGS ( Fig. 21A–C ). Prefemoral lobes rounded-triangular in ventral view. Two coxosternal setae (CXS) close to lateral margin of coxosternum, well separated from prefemoral lobes. Prefemora with two short mesapical setae (APS) and a few, scattered lateral setae (LPS).

STERNUM 9 ( Fig. 22F ). Triangular, basal margin convex, lateral margins concave.

GONOPOD COXA ( Figs 21E–I , 23A–C ). Holotype ( Fig. 21E–I ): proplical lobe hidden behind long, sigmoid metaplical spinelike process (msp); cucullus (CU) drawn out into rounded process; mesal margin with triangular process (mpp) ca at midlength, process forming base of subsemicircular sinus (si); posterior surface with broad transverse impression (ti). Paratype from Amani ( Fig. 23A–C ): metaplical spinelike process (msp) more strongly curved, fishhook-shaped; mesal sinus (si) delimited distally by long rounded lobe (rl); transverse impression (ti) deeper than in holotype.

GONOPOD TELOPODITE ( Figs 22A–E , 23 ). Holotype ( Fig. 22A–E ): arculus 90º. Torsotope (TT) extended, with a triangular lobe (TL) fitting into torsion on posterior side. A stout, curved post-torsal spine (PTS)

at end of torsotope, post-torsal narrowing not distinguishable. Solenomere (SLM) whiplike, concealed within telomere except for longitudinally striate tip. Telomere (TM) taeniate, forming almost complete circle, with a stout, curved basal spine (bts) arising at right angles with surface; margins of telomere smooth, a tongue-like lobe (to) near mesal extremity. Paratype from Amani ( Fig. 23 ): tongue-like lobe (to) larger; with a longtitudinal serrated ridge (sr) along part of inner curvature; basal (dorsal) surface of outer curvature proximally with a ‘hairy’ area (ha) bordering on slightly undulate lamella (ul) (the two latter characters were unobservable in the holotype).

Descriptive notes (female)

SIZE. Length 36 mm, diameter 2.2 mm, 58 podous rings, no apodous rings in front of telson. Conspecificity with males indicated by general appearance including shape of limbus lobes.

Distribution

Known from Mazumbai in the West Usambaras and Amani in the East Usambaras. See Doody et al. (2001) for information on Amani, and Redhead (1981) for information on Mazumbai.

Figures

Fig. 21. Calyptomastix zoltani sp. nov., holotype, ♂ (NHMD 621719). A–C. First pair of legs. A.Anterior view. B. Sublateral view. C. Ventral view.D. Midbody dorsal limbus.E–I. Left gonopod coxa. E. Anterior view. F. Posterior view. G. Mesal view. H. Lateral view. I. Subventral view. Abbreviations: APS=mesapical prefemoral setae; CU =cucullus; CXS = coxosternal setae; LPS = lateral prefemoral setae; mpp= mesal proplical process; msp =metaplical spinelike process; si =mesal sinus;ti = transverse impression. Scale bars: A–C, E–I =0.1 mm; D =0.01 mm.

Fig. 22. Calyptomastix zoltani sp. nov., holotype, ♂ (NHMD 621719). A–E. Left gonopod telpodite. A. Anterior view. B, E. Posterior view. C. Ventral view. D. Dorsal view. F. Sternum 9. Abbreviations: bts= basal telomeral spine; PTS = post-torsal spine; SLM =solenomere; TL =torsotope lobe; TM =telomere;to =tongue-like lobe; TT = torsotope. Scale bars =0.1 mm.

Fig. 23. Calyptomastix zoltani sp. nov., paratype, ♂ from Amani (NHMD 621720). A–C. Left gonopod coxa.A. Lateral view. B. Subposterior view. C. Mesal view.D–F. Left gonopod telopodite. D. Detail from basal outer surface of telomere. E. Posterior view. F. Distal part of telomere, with part of solenomere, posterior-apical view. Abbreviations: ha = ‘hairy’ area; MP=metaplica; mpp =mesal proplical process; msp= metaplical spinelike process; PP =proplica; si =mesal sinus; SLM =solenomere; sr = serrated ridge; to =tongue-like lobe;ul =slightly undulate lamella. Scale bars: A–B, D–E= 0.05 mm; C= 0.1 mm.