Camptomorpha hoffmani, Golovatch, Sergei I. & Bouzan, Rodrigo S., 2025

Golovatch, Sergei I. & Bouzan, Rodrigo S., 2025, Review of the South American millipede genus Camptomorpha Sivestri, 1897, with the description of a new species from Peru (Diplopoda: Polydesmida: Chelodesmidae), Arthropoda Selecta 34 (1), pp. 1-15 : 11-14

Camptomorpha hoffmani sp.n.

Fig. 12 .

HOLOTYPE ♂ ( ZMUM), Peru, Junin Dept., Satipo Prov., near Rio Venado , 1100–1400 m a.s.l., 11º11′41″S 74º46′40″W to 11º11′04″S 74º45′59″W, tropical forest, 13–20.XI.2016, I. Melnik leg.

NAME. GladlY dedicated to the late Richard L. Hoffman (1927–2012), a globally renowned specialist in the systematics of Diplopoda and an amiable friend, whose unpublished documents have so extensively been used in the present review.

DIAGNOSIS. Differs from congeners primarilY bY the details of gonopodal structure (see also Key below and Fig. 12 ).

DESCRIPTION. Length ca 48 mm, width of midbody metazona 6.3 mm. General colouration in alcohol mostly brown to grey-brown, lateral rims of paraterga and their immediately adjacent parts yellowish to grey-yellow both dorsally and ventrally, legs largely red-brown, antennae and legs somewhat infuscate distally, venter a little lighter, gonopodal telopodites yellow ( Fig. 12 ).

Head with a rather densely setose clypeolabral region, vertex nearly bare, epicranial suture evident; interantennal isthmus narrow, about half as wide as diameter of antennal socket ( Fig. 12A, B ). Antennae short and robust, only slightly clavate, in situ barely projecting past ring 2 dorsally; in length, antennomeres 2=6>3–5> 1>7>8.

Collum broadly rounded laterally and rather broadly rounded caudolaterally, narrowly rimmed. Collum and rigs 2–4 unusually compact and tightly following one after the other, vs remaining rings, these being more loose, as usual, and gradually attenuating towards telson. Dorsum moderately convex, especially anteriorly. Metaterga rather smooth and shining, prozona more dull, sides below paraterga arcuately striolate. Paraterga well-developed, on ring 19 smallest, mostly set at about upper 1/3 body height, clearly rimmed throughout, poriferous calluses (= peritremata) distinct, but not set off from lateral rim. Anterior corner of paraterga invariably broadly rounded, lateral rim smooth, caudal corners first obtuse and well rounded, on rings 4 and 5 subrectangular, thereafter increasingly acute, starting with ring 7 increasingly pointed and drawn past rear tergal margin. Tergal setae missing, setation pattern untraceable. Ozopores inside pits dorsolateral. Strictures between pro- and metazona deep lines. Limbus inconspicuous and entire. Pleurosternal carinae very small ridges on rings 2–5, poor swellings on rings 6 and 7, thereafter virtually missing. Spiracles small and inconspicuous. Epiproct very short, digitiform, subtruncate at apex and devoid of apical claws. Hypoproct subtriangular, with a short central tooth and 1+1 large setigerous knobs at caudal margin ( Fig. 12A–H ).

Sterna smooth, flat and bare, cross-impressions slight, sternal cones absent. Legs long and slender, ca 1.2–1.3 times as long as midbody height; coxae 3 each with a rather high, setose, straight, digitiform, apically rounded and well separated ventro-apical process (♂); all prefemora and tibiae but two last pairs with evident ventro-apical swellings and chelae (= sole pads subtending the tarsi basallY), respectivelY (♂). In length, femur (clearly curved ventrad)> prefemur = tibia (with chela)> postfemur = tarsus> coxa >> claw.

Gonopodal aperture ( Fig. 12H, I ) transversely reniform, large, taking up most of ventral side of ♂ prozonum 7, not shifted onto metazonum 6, with prominent, lateral, rounded ridges and a rather small, central, caudal shelf inside. Gonopodal sternal elements fully membranous, devoid of sclerites ( Fig. 12J ). Gonopods complex ( Fig. 12H–M ). Coxites short, globose, much shorter than caudally curved telopodites, each with two distodorsal macrosetae; cannula as usual, slender and regularly curved. Telopodites tripartite, prefemorites as usual, short and very densely setose. Prefemoral process (PfP) bipartite, but button-shaped at an articulated apex and carrying two spines of different size, one (d) distal and significantlY more stronglY developed than a basal spine b ( Fig. 12J–M ). Acropodite (A) acuminate, with a considerable rounded lobe orally at midway. PfP much longer than A. Solenomere (sl) simple, rather regularly curved and acuminate.

♀ unknown.

DISTRIBUTION. Only the type locality.

Figures

Fig. 12. CAmptOmOrpHA HOffmAni sp.n., ♂ holotYpe. A — habitus, lateral view; B, E — anterior part of bodY, ventrolateral and dorsal views, respectively; C, F — middle part of body, sublateral and dorsolateral views, respectively; D, G — caudal part of body, ventral and dorsolateral views, respectively; H — intact ring 7 with gonopods in situ, subventral view; I — ring 7 with removed gonopods; J — both gonopods, anteroventral view; K–M — left gonopod, anteromesal, anteroventral and sublateral views, respectively. Designations:A — acropodite; b — basal spine on PfP; d — distal spine on PfP; PfP — prefemoral process; sl — solenomere. Рис. 12. CAmptOmOrpHA HOffmAni sp.n., голотип ♂. A — обЩий вид, сбоку; B, E — переднЯЯ часть тела, соответственно одновременно сниЗу и сбоку и сверху; C, F — среднЯЯ часть тела, соответственно почти сбоку и одновременно сверху и сбоку; D, G — ЗаднЯЯ часть тела, соответственно сниЗу и одновременно сверху и сбоку; H — целый туловиЩный сегмент 7 с гоноподами на месте, почти сниЗу; I — туловиЩный сегмент 7 с вычлененными гоноподами; J — оба гонопода, одновременно спереди и сниЗу; K–M — левый гонопод, соответственно одновременно спереди и иЗнутри, одновременно спереди и сЗади и почти сбоку. ОбоЗначениЯ:A — акроподит; b — шип в основании PfP; d — дистальный шип на PfP; PfP — префеморальный отросток; sl — соленомер.