Lamelloramus triangularis, Frederiksen, Sara B., 2013

Frederiksen, Sara B., 2013, East African odontopygid millipedes 3: Two new genera; Lamelloramus and Aquattuor proposed to contain three new species (Diplopoda; Spirostreptida; Odontopygidae), Zootaxa 3694 (1), pp. 59-66 : 63-64

Lamelloramus triangularis n.sp.

Fig. 3 , 9–12 .

Material: Holotype male: TANZANIA, East Usambara Mts., Amani, 1000 m, 26/VII/1974, I.B. & H. Enghoff leg. (ZMUC 00020517). Paratype male: TANZANIA, East Usambara Mts., Amani., 500 m, 07/II/1977, H. Enghoff, O. Lomholdt. O. Martin leg. (ZMUC 00020518). 2 males: TANZANIA, Usambara Mts., Nilo Forest Reserve, Tanga region, Muheza district, 04°53`S, 38°38`E, 9/XI/2000. Frontier Tanzania. (ZMUC 00020523, ZMUC 00020524). Male: TANZANIA, Usambara Mts., Nilo Forest Reserve, Tanga region, Muheza + Korogwe district, 04°57`53,1"S, 38°38`28,6" E, 9/II/2001. Frontier Tanzania. (ZMUC 00020527).

Diagnosis: Differs from L. rhombiformis by the coxa. The coxal apex is clearly differently shaped. Where L. rhombiformis is diamond-shaped, L. triangularis is triangular. Also the median metaplical flange of L. triangularis does not reach as high apically as in L. rhombiformis , but instead reaches further lateral basally (it reaches beyond metaplical process which metaplical flange of L. rhombiformis does not). Also the side-branching lamella of L. triangularis is triangular instead of square. L. rhombiformis has a serration running along the centre of the telomere, where L. triangularis only has a straight edged ridge.

Etymology: Named after the triangular-shaped coxal apex.

Description (based on all specimens): Body length 34–45mm, diameter 3,0- 4,1mm, 49-55 podous body rings. For head, body and colouration see genus description. Telson brown with yellow edges.

Gonopods (fig. 9–12): Coxa with a lateral lobe (ll) about half way towards apex, mesal metaplical flange (mmf) small. Proplica ending in a distad proplical lobe (pl) on median side. Above, proplical lobe reaches the large triangular apex (pa); proplica and metaplica merged together forming a "roof". Median metaplical lamella (ml) curves outwards and up, flat and rounded, with the flat side turned 90° compared to apex. Apex clearly reaching above metaplical lamella. Metaplical lamella starting on anterior side of coxa, curving around medially to the posterior side, laterally reaching beyond the median metaplical process (mmp) situated just basally. Metaplical lamella merges anteriorly into lobular metaplical process which is "roofing" the position of the telopodite arculus. Metaplical process curves basoposteriorly to accommodate telopodite arculus. Apically of lateral lobe a small posteriorad lateral metaplical flange (lmf) is situated. Telopodite: basomere with a torsotope and a posttorsal narrowing, between torsotope and narrowing a posttorsal basomeric spine (bs) is situated pressed to basomere. Telomere long and ribbon-shaped, the last 2/3 looping with a smooth ridge running the length of it centrally. Telomere turning apically in a 90° angle. At the base of telomere, a small telomeric lamella (btl1) is closely appressed. At the base of telomere on the opposite side of the small telomeric lamella, a big elongate telomeric lamella (btl2) is folded over telomere and solenomere. Just before the telomere curls a big, triangular lamella side branches (stl). Solenomere long and whip-like, protruding from telomere just basally to side-branching telomeric lamella, and with a small loop and strong striation at apex. Efferent grove clearly visible.

Figures

FIGURE 1 – 4. 1: Lamelloramus rhombiformis n. sp. limbus, external view. 2: Aquattuor denticulatus n. sp. limbus, external view. 3: Lamelloramus triangularis n. sp. telson. 4: Aquattuor denticulatus n. sp. telson. Scales 10 µm (1), 100 µm (2 – 4).

FIGURE 9 – 12. Lamelloramus triangularis n. sp. 9: right gonopod, posterior view. 10: left gonopod, anterior view. 11: telomeric ridge. 12: left gonopod, mesal view. Scales 100 µm. bs: basomeric spine, btl 1 – 2: basal telomeric lamella 1 – 2, ll: lateral lobe, lmf: lateral metaplical flange, ml: metaplical lamella, mmf: mesal metaplical flange, mmp: median metaplical process, pa: proplical apex, stl: side-branching telomeric lamella.