Lobogonus trilobatus Demange, 1971

VandenSpiegel, Didier, Shelley, Rowland M. & Golovatch, Sergei I., 2020, The millipede genus Globanus Attems, 1914, endemic to Sao Tome and Principe, with the description of a new species (Diplopoda, Spirostreptida, Spirostreptidae), ZooKeys 930, pp. 61-74 : 61

Lobogonus trilobatus Demange, 1971 Figure 1

Globanus trilobatus : Krabbe 1982: 146-147.

Material observed.

Syntypes: 10 ♂♂, 6 ♀♀, 5 juv, Sierra Leone, Mt Loma, 02.XI.1964 (MNHM-MY-MY 6531).

Remarks.

Having studied the original description, closely examined the type species of the genus Lobogonus Demange, 1971 (Mt Loma region, Sierra Leone, MNHN, types), and compared its gonopods to those of Globanus spp., we disagree with the decision of Krabbe (1982) to merge Lobogonus with Globanus . Krabbe synonymized these two genera on account of similarities in gonopod structure, but the similarities appear to be rather superficial. In addition, both of the genera show different, totally disjunct distributions; Globanus is confined to São Tomé and Príncipe, whereas Lobogonus occurs in the Mont Loma region, Sierra Leone. Lobogonus trilobatus is a large millipede (ca 200 mm long) with long legs (80% of maximum body diameter; Fig. 1A, B ), vs. Globanus species, which are considerably smaller and show relatively short legs (ca 60% of maximum body diameter; Fig. 2A, E ). Lobogonus trilobatus has a pilose gnathochilarium, in contrast to the poorly setose one observed in Globanus species (Fig. 2D ). Similarities of the gonopods are also superficial and only concern the post-torsal process of the gonotelopodites, with 2 or 3 lobes or processes observed in both genera. In Globanus these lobes are subapical lobes, whereas in Lobogonus they are apical. The gonocoxite of L. trilobatus is rather stout and large (Fig. 1C-E ) compared to the slender gonocoxite observed in Globanus species.

Figures

Figure 1. Lobogonus trilobatus Demange, 1971, ♂ syntype. A habitus, lateral view B transverse section of midbody segment C right gonopod, posterior view D left telopodite, anterior view E tip of telopodite. Abbreviations: atp = antetorsal process, bs = basomere, lap = latero-apical process, map = meso-apical metaplical process, mp = metaplica, pp = proplica, sb = seminal branch. Scale bars: 10 mm (A); 1 mm (C); 500 µm (D, E).

Figure 2. Globanus drewesi sp. nov., ♂ paratype. A habitus, lateral view B collum and segments 2 - 6, lateral view C frontal view of head D gnathochilarium E midbody transversal section F first pair of legs, oral view G second pair of legs, oral view H midbody legs, oral view I midbody claw, caudal view. Abbreviations: me = mentum, pe = penes, pfp = prefemoral process, s = seta at base of claw, sg = submedian transverse groove. Scale bars: 5 mm (A); 1 mm (B) 1 mm (D, E); 500 µm (C, D, F, G); 200 µm (H); 50 µm (I).