Spirostreptus heros Porat 1872

Mwabvu, Tarombera, Hamer, Michelle, Slotow, Robert & Barraclough, David, 2009, A revision of the taxonomy and distribution of Spirostreptus Brandt 1833 (Diplopoda, Spirostreptida, Spirostreptidae) with descriptions of a new species and a new genus of spirostreptid millip, Zootaxa 2211, pp. 36-56: 39-41

publication ID

10.5281/zenodo.189858

persistent identifier

http://treatment.plazi.org/id/137D7630-A328-DB39-FF56-EA5CFAE0FC55

treatment provided by

Plazi

scientific name

Spirostreptus heros Porat 1872
status

 

Spirostreptus heros Porat 1872 

Figs 1View FIGURE 1, 7View FIGURE 7 a

Spirostreptus heros Porat 1872  , p. 29; Hoffman et al. 2001; Mwabvu 2005 a; Hoffman 2008 Spirostreptus triodus Attems 1909  , p. 46, figs 76–79.

Triaenostreptus triodus: Attems 1928  ; Hoffman 1971, 2008; Krabbe 1982; Hamer 1998; Hoffman et al. 2001

Type material: Holotype: BOTSWANA: 1 3, Kalahari [22 0 36 'S, 23 0 34 'E], ( ZMBAbout ZMB 4968).

Additional material examined: BOTSWANA: 1 3, 1 Ƥ, Gemsbok National Park, Kalahari [22 0 36 'S, 23 0 34 'E], 20.iv. 1970, B. Lamoral ( NMSAAbout NMSA 16152); 1 3, 1 Ƥ, Kalahari [22 0 36 'S, 23 0 34 'E], 2005, ( NMSAAbout NMSA 20570). SOUTH AFRICA: North West Province: 2 3, Malopo [25 0 43 'S, 24 0 17 'E], 13.i. 2001, R. Slotow & M. Hamer ( NMSAAbout NMSA 20495, 20498). Northern Cape Province: 1 3, 1 Ƥ, Northern Cape [27.697 0S, 21.355 0E], ( NMSAAbout NMSA 20551); 1 3, Northern Cape [27.697 0S, 21.355 0E], ( NMSAAbout NMSA 20495). NAMIBIA: 2 3, 5 Ƥ, Okawango [18 0 18 'S, 19 0 15 'E], 29.iii. 2002, G. Plotner ( ZMBAbout ZMB 13737View Materials, 13738, 13739 & 13742). ZIMBABWE: 1 3, Beitbridge [22 0 02'S, 30 0 00'E], (NMZ/D 835).

Diagnosis: Lateral and medial edges of proplica parallel; proplica without abrupt widening subapically; angle between lateral lobe and distal lobe equal to or less than a right angle; antetorsal process S-shaped ( Figs 1View FIGURE 1 a, 1 b, 7 a).

Description: Size: Body length 184–344 mm; minimum and maximum body width 8 –14.5 mm and 13.5– 19 mm; antenna length 10–13 mm.

Number of body rings: 59–68.

Colour: Body black; legs and antennae black or dark brown.

Collum: Anterior produced laterally into a narrow lobe, with 2–5 complete folds and 0–3 incomplete folds ( Fig. 1View FIGURE 1 d).

Pre-femoral process of 1 st pair of male legs: Proximally parallel and rounded, medial nipples distally narrow and strongly deflected laterally ( Fig. 1View FIGURE 1 c).

Gonopod: ( Figs 1View FIGURE 1 a, 1 b) 7–9 mm long; telocoxites parallel, but not in contact.

Sternite short, wide and apex not extending distally to level of paracoxite apex.

Proplica tapering apically. Apex of proplica conceals proximal lateral lobe. Proplica does not overlap distal lobe ( Fig. 1View FIGURE 1 a).

Metaplica without lobes or humps, wider proximal to telopodite knee ( Fig. 1View FIGURE 1 b).

Lateral lobe extends beyond lateral edges of proplica and distal lobe. Aborally, lateral lobe proximally narrow, rounded distally ( Figs 1View FIGURE 1 a, 1 b).

Distal lobe laterally and apically rounded; medial edge of distal lobe concave, forming a shallow invagination. Surface of distal telocoxite lobe smooth; distal lobe not extending beyond lateral edge of proplica apex ( Fig. 1View FIGURE 1 a). Orally, the distal lobe may have a shallow central depression.

Telopodite with antetorsal process which extends past paracoxite, post-knee telopodite with an open coil. Antetorsal process S-shaped ( Figs 1View FIGURE 1 a, 1 b, 7 a).

Distribution: Known from southern Botswana, north-western South Africa, northern Namibia and southern Zimbabwe.

Remarks: The smooth surface texture and shape of the distal lobe of the gonopods resemble the form in batokensis  , unciger  and kruegeri  rather than sebae  and tripartitus  .

The gonopods of heros  and kruegeri  are the most similar. However, in heros  the angle between the lateral lobe and distal lobe is equal to or less than a right angle while in S. kruegeri  it is wider. Additionally, in heros  the lateral edge of the proplica is straight, without abrupt widening subapically while in kruegeri  the proplica is wide subapically. The antetorsal process in heros  is S-shaped unlike in kruegeri  where it is concave ( Figs 7View FIGURE 7 a, 7 b). The distal nipple on the lateral lobe in some specimens of kruegeri  has not been observed in heros  . In addition, the medial edges of the telocoxites are straight and largely parallel along the whole length in heros  as opposed to kruegeri  where they are widely separated at the level of the lateral lobe ( Figs 1View FIGURE 1 a, 2 a).

ZMB

Museum für Naturkunde Berlin (Zoological Collections)

NMSA

KwaZulu-Natal Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Diplopoda

Order

Spirostreptida

Family

Spirostreptidae

Genus

Spirostreptus

Loc

Spirostreptus heros Porat 1872

Mwabvu, Tarombera, Hamer, Michelle, Slotow, Robert & Barraclough, David 2009

2009
Loc

Triaenostreptus triodus:

Attems 1928

1928
Loc

Spirostreptus triodus

Attems 1909

1909
Loc

Spirostreptus heros

Porat 1872

1872