Eumastigonus hemmingseni Mauriès, 1983

Korsós, Zoltán & Johns, Peter M., 2009, Introduction to the taxonomy of Iulomorphidae of New Zealand, with descriptions of two new species of Eumastigonus Chamberlin, 1920 (Diplopoda: Spirostreptida: Epinannolenidea), Zootaxa 2065, pp. 1-24 : 12

Eumastigonus hemmingseni Mauriès, 1983

Figs. 18–21 , 24 .

Eumastigonus hemmingseni Mauriès, 1983 : Bull. Mus. natn. Hist. nat., Paris (4)5(A1): 259-261, Figs. 24-26 .

Types: Holotype 3, 23, 2Ƥ, and 1 imm. Ƥ paratypes (ZMUC), 1 3 paratype (MNHN). – New Zealand, North Island, Waikato Region, Kaimanawa Mountains (State Forest), leg. A. M. Hemmingsen, 12 Dec. 1972.

Other material studied: 203 and 33Ƥ

New locality records: New Zealand, North Island, Waikato Region: Waituhi Kuratau Scenic Reserve, lookout point, S38°51’ 46.8 – E175°32’ 43.2, 930 m, leg. PMJ & Z. Korsós, 27 Jan. 2008, under logs, 13 ( CMNZ: dissected for SEM: anterior and posterior gonopods).

Taranaki Region: Mt Egmont Nat. Park, Dawson Falls and tracks nearby, 915 m, leg. M. Buchler, 6 Nov. 1963, 13 ( CMNZ); Stratford, leg. R. S. Bigelow, 13 Dec. 1976, mailbox, 13 ( CMNZ).

Waikato Region: Tongariro Nat. Park, Chateau, 1100 m, leg. PMJ, 8 Dec. 1961, 13, 7Ƥ ( CMNZ).

Wellington Region: Akatarawa, leg. V. M. Stout, 24 Jan. 1960, in logs, 63, 6Ƥ ( CMNZ) and leg. PMJ, 30 Nov. 1963, Fuchsia broadleaf forest, 23, 7Ƥ ( HNHM, left vulva removed for drawing). Otaki Forks, Field’s track, Podocarpus broadleaf forest, leg. PMJ, 21 Oct. 1965, 33, 10Ƥ ( CMNZ: one male is dissected for SEM: head, 1st legpair, 2nd legpair with penis, gonopods, 7th ring). Tararua Range, Mangahao Dam, 340 m, leg. P. G. McGregor, 2 Nov. 1980, 23 ( CMNZ).

Hawkes Bay Region: Outlet of Lake Waikaremoana, leg. PMJ, 4 Dec. 1961, 33, 3Ƥ ( CMNZ).

Distribution: New Zealand, North Island, Auckland, Waikato, Taranaki, Bay of Plenty, Hawkes Bay and Wellington Regions. See Fig. 52 .

Description: The species was properly described and illustrated by Mauriès (1983). It is notable for its relatively large size (length 68–78 mm, max. midbody diameter 3.8–4.3 mm, no. of rings 52–59+telson), and large ocellarium with ocelli in four complete rows. Body colour dark brown, but legs and paraprocts conspicuously paler, almost yellow. Paraprocts with 2+2 marginal setae. Males with femoral pads on their postgonopodal legs. Anterior gonopods with bulky, broad coxae, inner process (i) thin, membraneous; median process (m) slender, smooth, bent laterally; there is also a third, flat outer process (o) on anterior gonopod which is provided with short setae; flagellum apically penicillate ( Fig. 21 , as in distinctior ; Hoffman 1972). Telopodite longest, apically spatulate (a), laterally setose, broad, rounded, mediobasally with setose field (remnant of second telopodomere, t in Fig. 20 ). Posterior gonopods apically divided, setose tip of coxa extended, its length subequal to telopodite which is slim, cylindrical, tube-like, without pointed apex ( Figs. 18–20 ).

Female vulva ( Fig. 24 ) large, up to 1.5 mm in diameter, disc-shaped, compact. Operculum (op) small, narrow, triangular, anterior valve with 12–16 long marginal setae, posterior one with only one or two. Internal structure, apodematic tube and ampulla could not be observed.

Figures

FIGURE 52. New Zealand, North Island, distributions of E. kaorinus (infilled squares), E. distinctior (blank squares), and E. hemmingseni (infilled triangles).

FIGURES 18 – 19. E. hemmingseni male from Otaki Forks, Wellington Region, scanning electronmicrographs. 18: Anterior gonopods, anterior view (i = inner lobe, m = median lobe, o = outer lobe, a = apex of spatulate telopodite process), 19: posterior gonopods, anterior view.

FIGURES 20 – 21. E. hemmingseni male from Otaki Forks, Wellington Region, scanning electronmicrographs. 20: Anterior gonopods, posterior view (t = remnant of second telopodomere), 21: tip of flagellum.

FIGURES 22 – 24. Female vulvae (op = operculum). 22: E. kaorinus from Whangaruru headland, Northland Region, right vulva, anterior view, 23: E. distinctior from Porirua, Wellington Region, Galathea Expedition, 1951 (ZMUC), left vulva, posterior view, 24: E. hemmingseni from Akatarawa, Wellington Region, right vulva, posterior view. Scales 0.5 mm.