Phaneromerium eskovi, Golovatch, 2024

Golovatch, S. I., 2024, Five new species of the millipede family Trichopolydesmidae from Peru (Diplopoda: Polydesmida), Arthropoda Selecta 33 (1), pp. 1-13 : 8-10

Phaneromerium eskovi sp.n.

Figs 20–30 .

HOLOTYPE ♂ ( ZMUM), Peru, Junin Region, Calabaza , 2200 m a.s.l., S 11º30′38″, W 74º49′15″, 16.IX.2017, K.Yu. Eskov leg.

PARATYPES: 3 ♂♂ ( ZMUM), same place, together with holotype .

NAME. To honour my friend Kirill Yu. Eskov, the collector.

DIAGNOSIS. Differs from congeners by the clearly incrassate anterior ♂ legs, including the laterally swollen prefemora ( Fig.

24), coupled with 20 body rings ( Figs 20–22 ) and slender tripartite gonotelopodites regularly curved cephalad ( Figs 23, 25–30 ).

DESCRIPTION. Length ca 12 mm, width of midbody proand metazonae 1.0 and 1.5 mm, respectively (♂). Colouration in alcohol uniformly light to dark red-brown with lighter yellowish to red-brown venter and legs ( Figs 20–22 ). Body with 20 rings.

In width, collum = head <ring 2 = 3 = 4 <5=15, thereafter body gradually tapering towards telson ( Fig. 20–22 ). Paraterga strongly developed, set high (at about upper ¼ midbody height), starting with collum, mostly slightly upturned, leaving dorsum largely slightly convex to subhorizontal. Anterior ♂ prefemora with lateral bulges ( Fig. 24 ).

Gonopods ( Figs 23, 25–30 ) with relatively small coxites (cx), these being stout and shorter than telopodites (te), each cx with a long, simple and unciform cannula (ca) as usual. Telopodite (te) slender, clearly and regularly curved cephalad, tripartite, consisting of three subequally long and tightly adjacent branches: a lateral branch (lb), a slightly longer and flagelliform branch (fb), and a solenomere (sl), the latter densely barbed in distal half; a lateral, rounded, hyaline lobe (lo) distal to a short parabasal tooth (t); seminal groove largely borne by sl, the latter starting near t.

Figures

Figs 20–22. Phaneromerium eskovi sp.n., ♂ paratype, habitus, dorsal, lateral and ventral views, respectively. Photographs by K.V. Makarov, taken not to scale. Рис. 20–22. Phaneromerium eskovi sp.n., паратип ♂, обЩий вид, соответственно сверху, сбоку и сниЗу. Фотографии К.В. Макарова, снЯты беЗ масштаба.

Figs 23–27. Phaneromerium eskovi sp.n., ♂ paratype. 23 — both gonopods in situ, ventral view; 24 — leg 7, lateral view; 25–27 — right gonopod, mesal, caudal and lateral views, respectively.Abbreviations: ca — cannula; cx — coxite; te — telopodite. Photographs by K.V. Makarov, taken not to scale. Рис. 23–27. Phaneromerium eskovi sp.n., паратип ♂. 23 — оба гонопода на месте, сниЗу; 24 — нога 7, сбоку; 25–27 — правый гонопод, соответственно иЗнутри, сЗади и сбоку. ОбоЗначениЯ: ca — канюлЯ; cx — коксит; te — telopodite. Фотографии К.В. Макарова, снЯты беЗ масштаба.

Figs 28–30. Phaneromerium eskovi sp.n., ♂ paratype, left gonopod, suboral, lateral and mesal views, respectively (cannula invisible). Abbre- viations: cx — coxite; fb — flagelliform branch; lb — lateral branch; lo — lateral lobe; sl — solenomere; t — basal tooth; te — telopodite. Scale bar: 0.2 mm. Рис. 28–30. Phaneromerium eskovi sp.n., паратип ♂, левый гонопод, соответственно почти спереди, сбоку и иЗнутри (канюлЯ не видна). ОбоЗначениЯ: cx — коксит; fb — жгутиковиднаЯ ветвь; lb — боковаЯ ветвь; lo — боковаЯ пластина; sl — соленомер; t — баЗальный Зуб; te — telopodite. Масштаб: 0,2 мм.