Dinematocricus aff. disjunctus Brölemann, 1913

Golovatch, S. I., Mauriès, J. P. & Akkari, N., 2021, On the collections of Indo-Australian Spirobolida (Diplopoda) kept in the Zoological Museum of the Moscow State University, Russia. 3. Some Rhinocricidae, Arthropoda Selecta 30 (1), pp. 3-27 : 14-15

Dinematocricus aff. disjunctus Brölemann, 1913

Figs 42–52 .

Dinematocricus disjunctus Brölemann, 1913: 134 , original description from the ♂ holotype from an unspecified locality in New Guinea.

MATERIAL. 5 ♂♂, 4 ♀♀, 2 ♀♀ juv. ( ZMUM), Papua New Guinea, Maclay Coast , near Kepoiak, S5°45′, E146°35′, forest litter, 13.II.1977, G.F. Kurcheva leg.

DESCRIPTION. Adults ca. 82–90 mm long, 7.0–9.0 mm wide, with 53–56p+T segments (♂, ♀), presumed subadults 52 or 54 mm long and 6.0 mm wide, with 52p+1ap+T segments. Colouration in adults dark red-brown to dark grey-brown, pattern mostly clear due to metazonae and anterior parts of prozonae being cingulate and lighter reddish to yellowish ( Figs 42, 44–46 ). Collum broadly flavous along both anterior and posterior margins ( Fig. 42, 44 ). Epiproct similarly flavous ( Fig. 46 ) or uniformly dark brown like head. Legs light to dark red-brown.

All characters as in Propodobolus sp. , except as follows.

Tegument smooth and shining, mostly very delicately vermiculate. Interantennal isthmus ca. 2x diameter of antennal socket. Collum broadly and regularly rounded laterally, anterior and lateral margins clearly, but narrowly bordered. Midbody segments/rings faintly striate to striolate, more densely and clearly so ventrad, striations on dorsum above ozopore level completely obliterate. Scobinae present, starting with ring 8 and traceable at least until midbody segments: inconspicuous, paramedian, narrow, lunular pits separated from each other by their own width and devoid of posterior fields. Ozopores small, inconspicuous disks, starting with ring 6, each pore lying upon line/suture both just before metazona and longitudinal line. Numerous light and irregular spots/sigilla on internal surface of meso- and metazonae. Epiproct small, faintly concave near midway in lateral view, flattened dorsoventrally. Paraprocts only faintly swollen along caudal margin.

Legs ca. 1/2 (♂) or 1/3 (♀) as long as body height; faint sole pads present only on ♂ tarsi, ♂ coxae 3–5 swollen ventrally, a spine each above and below claw.

Gonopods ( Figs 47–52 ). Anterior gonopods with a slender, central, apically rounded, sternal process (s), the latter being a little longer/higher than both coxa (cx) and telopodite (t) with its small, apical, rounded, caudolateral process (tp); cx stout, with a strong, mesal, rounded, subtriangular projection (mp), t more slender than cx. Posterior gonopods consisting of a shorter, relatively stout, subcylindrical coxa and a slender, much longer, bipartite telopodite; apicolateral branch (lb) the longest,>3x as long as a similarly flagelliform solenomere (sl).

REMARKS. Based on Brölemann [1913], variations in D. aff. disjunctus compared to the original description concern the colouration (dark red-brown to dark grey-brown, with a mostly clearly cingulate pattern of lighter reddish or yellowish metazonae and anterior parts of prozonae, vs. dull ochraceous with brown caudal margins of metazonae in the description), body size (adults ca. 82–90 mm long and 7.0– 9.0 mm wide, with 53–56p+T segments, vs. holotype 57 mm long and 5.0 mm wide, with 52p+2ap+T segments in the original description), scobinae (starting with segment 8 and present at least until midbody rings, vs. ca. 14 and present until about segment 30, according to the original description). In addition, since the anterior gonopods of the holotype show a slightly higher/longer, albeit similarly slender central sternal process and considerably higher/longer telopodites [ Brölemann, 1913], the identity of the samples from Maclay Coast is bound to remain provisional.

Figures

Figs 42–50. Dinematocricus aff. disjunctus Brölemann, 1913, # from Maclay Coast. 42 — habitus, lateral view; 43, 44 — anterior part of body, ventral and lateral views, respectively; 45 — body segments 9–14, dorsal view; 46 — posterior part of body, lateral view; 47, 48 — anterior gonopods, anterior and posterior views, respectively; 49, 50 — isolated left posterior gonopod, anterior and posterior views, respectively. Designations explained in text. Pictures by K.V. Makarov, taken not to scale. Рис. 42–50. Dinematocricus aff. disjunctus Brölemann, 1913, # с Берега МаклаЯ. 42 — обЩий вид, сбоку; 43, 44 — переднЯЯ часть тела, соответственно сниЗу и сбоку; 45 — сегменты тела 9–14, сверху; 46 — ЗаднЯЯ часть тела, сбоку; 47, 48 — передние гоноподы, соответственно спереди и сЗади; 49, 50 — иЗолированный левый Задний гонопод, соответственно спереди и сЗади. ОбЪЯснениЯ обоЗначений в тексте. Фотографии К.В. Макарова, снЯты беЗ масШтаба.

Figs 51–52. Dinematocricus aff. disjunctus Brölemann, 1913, # from Maclay Coast. 50 — anterior gonopods, anterior view; 51 — right posterior gonopod, posterior view. Designations explained in text. Рис. 51–52. Dinematocricus aff. disjunctus Brölemann, 1913, # с Берега МаклаЯ. 50 — передние гоноподы, спереди; 51 — правый Задний гонопод, сЗади. ОбЪЯснениЯ обоЗначений в тексте.