Trichopolydesmidae from Cameroon, 1: The genus Hemisphaeroparia Schubart, 1955. With a genus-level reclassification of Afrotropical genera of the family (Diplopoda, Polydesmida)
Author
Golovatch, S. I.
Author
Fiemapong, A. R. Nzoko
Author
Tamesse, J. L.
Author
Mauries, J. - P.
Author
VandenSpiegel, D.
text
ZooKeys
2018
785
49
98
http://dx.doi.org/10.3897/zookeys.785.27422
journal article
http://dx.doi.org/10.3897/zookeys.785.27422
1313-2970-785-49
03935A66FA344DEBBEEA00EC88094062
03935A66FA344DEBBEEA00EC88094062
Hemisphaeroparia parva
sp. n.
Figs 13, 14, 28F
Type
material.
Holotype ♂ (MRAC 22754), Cameroon, Littoral Region, Sanaga Maritine Division, Mouanko, forest,
03°38'N
,
009°46'E
, leg. A.R. Nzoko Fiemapong and J.A. Yetchom Fonjo.
Paratypes: 4 ♂♂ (MRAC: 22755), 1 ♂ (SEM, MRAC 22756), 1 ♂ (ZMUM), 1 ♂ (UY1), same locality, together with holotype.
Diagnosis.
Differs from other species of the genus by having 19 body segments and by the absence of epicranial modifications in the ♂, coupled with the presence of only a single prominent branch (ab) which is exposed beyond the gonopodal coxa only distally; ab at the base with a large, lateral, finger-shaped process (lp); the seminal groove is rather long and moves onto a very short and retrose solenomere (sl) apically (Figure 14).
Name.
To emphasize the very small size; adjective in feminine gender.
Description.
Length of holotype ca. 3 mm (♂), width of midbody pro- and metazonae 0.25 and 0.3 mm, respectively. Length of paratypes 2.8-3.2 mm, width of midbody pro- and metazonae 0.2-025 and 0.3-0.4 mm, respectively (♂). Coloration in alcohol nearly pallid (Figure 28F), paratypes in places faintly pinkish.
All other characters as in
H. zamakoe
sp. n., except as follows.
Body with 19 (♂) segments. Head very densely micropilose, without epicranial modifications (♂)(Figure 13A, C, F, J). Interantennal isthmus ca. 1.5 times as large as diameter of antennal socket (Figure 13F). Antennae long and strongly clavate, reaching back to segment 3 when stretched dorsally (♂). In width, collum <segment 3 = 4 <2 <head = 5-16; thereafter body gradually tapering towards telson. Collum and
most
of postcollum metaterga with three transverse regular rows of setae, but some metaterga in anterior body half without middle row (Figure 13C, D, J, K). Tergal setae short, bacilliform to slightly subclavate, longitudinally finely ribbed (Figure 13
C-E
, I-L). Paraterga always regularly declivous. Caudal corner of paraterga always rounded, never drawn back behind rear tergal margin (Figure 13
C-E
,
J-L
).
Legs rather long and slender, ca. 1.2-1.3 times as long as midbody height; in length, tarsus> femur> prefemur> coxa = postfemur = tibia (Figure 13D).
Gonopodal telopodite (Figure 14) almost fully concealed inside a deep gonocoel, with only a single prominent branch (ab), this being exposed beyond coxa only distally; ab at base with a large lateral process (lp). Seminal groove rather long, moving onto a very short and retrose solenomere (sl) apically.
Figure 13.
Hemisphaeroparia parva
sp. n., SEM micrographs of ♂ paratype A habitus, lateral view B midbody segment, caudal view C, F, J anterior part of body, lateral, ventral and dorsal views, respectively D, G, K midbody segments, lateral, ventral and dorsal views, respectively E, H, L posterior part of body, lateral, ventral and dorsal views, respectively I tergal seta, lateral view M tergal fine structure. Scale bars: 0.5 mm (A), 0.1 mm (C,
F-H
, J, K), 0.05 mm (B, D, E, L), 0.01 mm (I, M).
Figure 14.
Hemisphaeroparia parva
sp. n., ♂ paratypes ASEM micrographs of both gonopods in situ, ventral view B, CSEM micrographs of right gonopod, subcaudal and submesal views, respectively D, E right gonopod, mesal and lateral views, respectively. Scale bars: 0.1 mm (D, E), 0.02 mm (A), 0.01 mm (
B-C
). Abbreviations: ab apical branch of telopodite, lp lateral process, sl solenomere.