Crassipetalum magnum Akkari & Stoev, 2023

Akkari, Nesrine, Macek, Oliver & Stoev, Pavel, 2023, A revision of the millipede family Paracortinidae (Diplopoda, Callipodida), ZooKeys 1187, pp. 341-399 : 341

publication ID	https://dx.doi.org/10.3897/zookeys.1187.113473
publication LSID	lsid:zoobank.org:pub:2F796283-3187-447E-88C6-4B61C50B640C
persistent identifier	https://treatment.plazi.org/id/B9A36E4F-DAAF-4FD5-9670-551A38D3B62A
taxon LSID	lsid:zoobank.org:act:B9A36E4F-DAAF-4FD5-9670-551A38D3B62A
treatment provided by	ZooKeys by Pensoft
scientific name	Crassipetalum magnum Akkari & Stoev
status	sp. nov.

Treatment

Crassipetalum magnum Akkari & Stoev sp. nov.

Figs 3 View Figure 3 , 4 View Figure 4 , 28 View Figure 28

Material examined.

Holotype: adult male, China, Gansu Province, Cha-gang Village , Zhou-qu County, alt. 1650 m., on 12.05.1998, leg. Chen De-niu, Zhang Guo-qia (TM_206979 IZCAS).

Etymology.

Species epithet refers to the unusually large mesal coxal and prefemoroidal processes.

Diagnosis.

Different from Crassipetalum inflatum by the larger and elongated shape of the prefemoroidal process, the absence of a second prefemoroidal process, and the different distal part of telopodite.

Description.

Body cylindrical, length 37-38 mm, maximal width ca 2.2 mm at PT6; body narrowing anteriad and posteriad from PT6; 54 (52 + 2 apodous) pleurotergites (PTs) + telson. Live colour unknown. Preserved specimen with yellow to pale brownish metazona (Fig. 3A, B View Figure 3 ); prozona greyish white (Fig. 3B View Figure 3 ); no stripes or other particular colour patterns; legs yellowish (Fig. 3C View Figure 3 ). Head: same colour as the body, vertex slightly darker, antennae whitish yellow (Fig. 3A View Figure 3 ). Fields of ommatidia subtriangular, blackish, composed of ~ 65 transparent ommatidia in eight rows from dorsal to ventral. Organ of Tömösváry ~ 2-3 × larger than ommatidium, situated close to and touching anterior side of eye. Head convex, with no particular modifications (Fig. 3C View Figure 3 ), covered with minute setae. Antennae short, extending backwards to around mid-length of PT5 (Fig. 3A, C View Figure 3 ); length of antennomeres (mm): 1 = 0.2; 2 = 0.87; 3 = 0.7; 4 = 0.76; 5 = 0.32; 6 = 0.45; 7 = 0.19. PTs composed of smooth prozona and carinate metazona, latter being greater in diameter than prozona. Prozona without crests, anterior part of metazona with scale-like ornamentation followed by a sharply raising posterior part forming well-developed longitudinal narrow and subparallel crests (Fig. 3B View Figure 3 ), well-separated from one another and extending over whole-body ring; crests gradually reduced in size laterally and ventrally. Chaetotaxy: all setae in anterior position on PTs 1-4, setae b, c, e migrated posteriorly on PT5; all setae on posterior position from PT6 onwards. Crests well developed, also on collum, comprising primary and secondary series; collum with seven or eight crests on each hemipleurite. Ozopores visible from sixth to the 49thPT, located on fourth (largest) crest. Hypoproct tripartite, median sclerite largest, subrectangular, bearing a pair of basal macrosetae; lateral sclerites smaller, triangular, with one seta each. Paraprocts divided into large ventral and smaller dorsal sclerites, each paraproct with a pair of long macrosetae. Spinnerets long and slender, arising from the caudal edge of epiproct and extending well beyond the margins of paraprocts.

Male sexual characters.

PTs 6 and 7 enlarged, leg-pairs 1 and 2 reduced and more setose than the rest, showing femoral and tarsal “brushes”, leg-pair 2 with posterior gonopore, legs 1-7 without noticeable modifications (Fig. 3C View Figure 3 ), coxal sacs present (visible) on leg-pairs 3-16.

Gonopods (Figs 3C, D View Figure 3 , 4 View Figure 4 ). Parallel, distally crossing. Each gonopod with one elongated, setose, clavate prefemoroidal process (pf1), reaching the distal part of telopodite (Fig. 4A, C, D View Figure 4 ). Setae of prefemoroidal process large and dense. Coxa with a protruding rounded anterior lobe (Ca) (Fig. 4D View Figure 4 ) and a large coxal process (b), almost of the same size as telopodite (Fig. 4 View Figure 4 ), narrowing at mid-length and apically projecting in a pointed tip lodged in small lateral notch of the distal part of the telopodite (Fig. 3D View Figure 3 ). Telopodite (T) with a stout stem, distally with a large lateral triangular downturned projection (k), a large mesal notch (n) separating a mesal spur-like process (p) and a posterior plateau-like horizontal process with a bifurcated mesal projection accommodating the solenomere (s) and parasolenomere (ps).