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 falcata
sp. n.
Figs 23, 24, 29E
Type material.
Holotype ♂ (MRAC 22769), Cameroon, Center Region, Awae, secondary forest,
03°06'N
,
10°29'E
, 27.III.2018, leg. A.R. Nzoko Fiemapong.
Paratypes: 1 ♂ (SEM, MRAC: 22770), 1 ♂ (incomplete, badly fragmented and without gonopods)(MRAC 22771), same locality, together with holotype.
Diagnosis.
Differs from other species of the genus by the presence of a particular epicranial tubercle with fine filaments on top (♂), of 19 body segments (♂), coupled with only one main branch (ab) on the gonopodal telopodite, this branch being very strongly exposed, very long, falcate and directed laterally, followed by a very small lobe (lo) more basally (Figs 23M, 24). No solenomere.
Name.
To emphasize the strongly falcate gonopodal branch ap; adjective in feminine gender.
Description.
Length of holotype ca. 3.5 mm (♂), width of midbody pro- and metazonae 0.25 and 0.4 mm (♂), respectively. Width of midbody pro- and metazonae
of
paratype 0.5 amd 0.7 mm, respectively. Coloration in alcohol light marbled red-brown, prozonae, le.g., and venter light grey-yellow (♂)(Figure 29E).
All other characters as in
H. zamakoe
sp. n., except as follows.
Body with 19 segments (♂). Epicranial region concave anteriorly in front of a clear swelling and bearing at bottom a conspicuous round tubercle supporting a tight group of numerous long filaments, these directed anteriorly (Figs 23D, L). Antennae relatively short and clavate, reaching behind to almost segment 3 when
stretched
dorsally (♂). In length, antennomere 3 = 6> 5> 2 = 4 = 7> 1. In width, collum <segment 3=4 <2 <head = 5-16; thereafter body gradually tapering towards telson. Tergal setae medium-sized to short, each ca. 1/4-1/3 as long as metatergum, bacilliform or subclavate, ribbed all along (Figs 23
A-C
,
G-K
). Paraterga medium-sized, set at around upper 1/3 of metazonae (Figs 23
A-C
, K), mostly declivous to subhorizontal, often slightly upturned caudally, faintly, but regularly rounded and bordered, lateral incisions absent. Caudal corner of paraterga always rounded, drawn increasingly back, but slightly reaching behind rear tergal margin only on segment 17 (Figs 23C, I).
Legs a little shorter (♂), slender, ca. 1.1-1.2 times as long as midbody height; in length, tarsus> femur> prefemur> coxa = postfemur = tibia.
Gonopodal telopodites (Figs 23M, 24) almost fully concealed inside a very large gonocoel, each with only one main branch (ab) very strongly exposed beyond coxa, being also unusually long, falcate and directed laterally, followed by a very small round lobe (lo) more basally. Seminal groove short, ending on a small squarish lobe without a solenomere.
Figure 23.
Hemisphaeroparia falcata
sp. n., SEM micrographs of ♂ paratype A, D, G anterior part of body, lateral, ventral and dorsal views, respectively B, E, H midbody segments, lateral, ventral and dorsal views, respectively C, F, I posterior part of body, lateral, ventral and dorsal views, respectively J tergal seta, lateral view K midbody segment, caudal view L epicranial tubercle with filaments M both gonopods in situ, ventral view. Scale bars: 0.1 mm (A, B, D, E,
G-I
, K), 0.05 mm (C, F), 0.02 mm (M), 0.01 mm (L), 0.005 mm (J).
Figure 24.
Hemisphaeroparia falcata
sp. n., ♂ paratypes A, BSEM micrographs of left gonopod, ventromesal and submesal views, respectively C, D left gonopod, mesal and lateral views, respectively. Scale bars: 0.1 mm (C, D), 0.02 mm (A, B). Abbreviations: ab apical branch of telopodite, lo lobe.