Hoffmanides dissutus ( Hoffman, 1963 )

Enghoff, Henrik, 2018, A mountain of millipedes VI. New records, new species, a new genus and a general discussion of Odontopygidae from the Udzungwa Mts, Tanzania (Diplopoda, Spirostreptida, Odontopygidae), European Journal of Taxonomy 394, pp. 1-29 : 18-20

Hoffmanides dissutus ( Hoffman, 1963)

Figs 7–8

Spinotarsus dissutus Hoffman, 1963: 1 .

Hoffmanides dissutus – Kraus (1966): 135.

Material studied (total: 6 ♂♂)

TANZANIA: 6 ♂♂, Iringa–Morogoro Regions, Udzungwa National Park , 350 m a.s.l., 8 Dec. 1995, Steven Liselli leg. ( VMNH; 1 ♂, ZMUC).

Description

Male

Based on studied specimens. Details from previous descriptions ( Hoffman 1963; Kraus 1966) in parentheses. Considering that two detailed descriptions of H. dissutus are thus available, and that the studied specimens agree completely with both of them, only a few details are highlighted here.

SIZE. Diameter 3.5–3.9 mm (3.7 mm); 61–64 podous rings, no apodous rings in front of telson (“56 Segmente”).

HEAD. Without peculiarities. Five supralabral setae (6).

COLOUR. After 22 years in alcohol, overall yellowish ( Fig. 7 ); prozonites from ozopore level up to ca ⅔ of distance to midline blackish; also a thin blackish midline, i.e., dorsum with two paramedian yellow bands.

ANAL VALVES ( Fig. 8A–B ). Dorsally drawn out into pointed, triangular, spine-like process, ventrally with small protruding knob; mesal margin raised, setiferous tubercles, especially middle one (stu) on pronounced “ravelins”.

LIMBUS ( Fig. 8C ). With long, spine-like lobes.

GONOPOD COXA ( Fig. 8D ). As illustrated by Hoffman (1963) and Kraus (1966).

GONOPOD TELOPODITE ( Fig. 8E ). As illustrated by Kraus (1966). In some specimens the solenomere is hidden within the telomere ( Fig. 8E ), but in others the solenomere has come free (due to preservation?), and the long, spine-like branch (ssb) arising from it, overlooked by Hoffman (1963) but illustrated by Kraus (1966: fig. 358), is obvious.

Female

Unknown.

Distribution

Helicochetus dissutus was described from “ Morogoro ” ( Hoffman 1963); this does not necessarily refer to the city of Morogoro, ca 150 km NE of Udzungwa National Park, but possibly to anywhere in the Morogoro Region. Enghoff et al. (2016) also recorded the species from the Morogoro Region, Uluguru Mts, Morningside.

Figures

Fig. 7. Hoffmanides dissutus (Hoffman, 1963), ♂, from Udzungwa Mts National Park. Photograph by A. Illum. Scale bar = 5 mm.

Fig. 8. Hoffmanides dissutus (Hoffman, 1963), ♂, from Udzungwa Mts National Park. A–B. Telson. A. Lateral view.B. Posteriorview.C. Limbus.D. Gonopod coxa, anterior view.E. Gonopod telopodite, posterior-mesal view. Abbreviations: ssb = spine-like side branch of solenomere, nested in cavity of telomere; stu = middle setiferous tubercle on “ravelin”; tm = tip of telomere. Scale bars: A–B, D = 0.2 mm; C = 0.001 mm; E = 0.1 mm.