Cissidium fraternum, Darby, 2020
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publication ID |
https://doi.org/ 10.5852/ejt.2020.622 |
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publication LSID |
lsid:zoobank.org:pub:9CD3B2CD-F072-4994-8CA9-24145D343401 |
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DOI |
https://doi.org/10.5281/zenodo.3795742 |
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persistent identifier |
https://treatment.plazi.org/id/619FAB89-D53D-4C06-A2B0-3023099107E3 |
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taxon LSID |
lsid:zoobank.org:act:619FAB89-D53D-4C06-A2B0-3023099107E3 |
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treatment provided by |
Valdenar |
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scientific name |
Cissidium fraternum |
| status |
sp. nov. |
Cissidium fraternum View in CoL sp. nov.
urn:lsid:zoobank.org:act:619FAB89-D53D-4C06-A2B0-3023099107E3
Figs 6H View Fig , 109 View Fig
Etymology
Johnson ms name, derivation unclear but presumably from the Latin adjective ‘ fraternus ’, meaning ‘brotherly’ and possibly referring to the similarity of this species to C. brachypterm sp. nov. and C. greensladei sp. nov., both also from the Solomon Islands.
Material examined
Holotype
SOLOMON ISLANDS • ♂; Guadalcanal, Monitor Creek, Umosani River ; 8 Jul. 1965; thicket litter, matted roots; no. 85; P.N. Lawrence leg.; BMNH.
Paratypes
SOLOMON ISLANDS • 1 ♀; Nuhu ; 1000 ft a.s.l.; 31 May 1965; gully bottom litter; P. Naturaga leg.; MMUE • 1 ♀; Guadalcanal, Mt. Austen ; Mar. 1966; no. 21336; P. Greenslade leg.; BMNH .
Description
SIZE. Habitus ( Fig. 109A View Fig ), length 0.60 mm.
COLOUR. Dusky yellow brown, antennae, legs and pubescence lighter.
HEAD. Width across eyes 0.20 mm; antennomeres III–XI 0.30 mm long, III–IX 0.16 mm long, X–XI 0.14 mm long; mentum as Fig 4A. View Fig
PRONOTUM. Length 0.15 mm, width 0.26 mm; base with a series of four or five foveae on each side separated by distinct space opposite scutellum and a few scattered smaller foveae anterior to these; lateral margins sharply angled, concave to slightly acute hind angles, sinuous to obtuse front angles, bordered, the border along the posterior margin interrupted between the hind angles and the median emargination in front of the scutellum ( Fig. 109B View Fig ).
ELYTRA. Width 0.36 mm; length. 0.4 mm, basal half rather sparsely covered with large foveolae.
MESOVENTRITE. Collar barely extended medially onto mid-keel; mid-keel wider anteriorly than posteriorly, the posterior angles clearly joining the mesocoxal anterior border as two carinae, sharply raised medially to junction with keel; keel with ± two setae, parallel-sided to blunt termination posterior to the interruption point of the mesocoxal margins; mesoventral lateral margins serrate in posterior half ( Fig. 109C View Fig ).
METAVENTRITE. Sparsely pubescent, length 0.13 mm, width across spines 0.13 mm, with a triangularly impressed area medially and a small medial fovea posterior to the mesocoxae.
WINGS. Macropterous.
GENITALIA. Female spermatheca globular. Male aedeagus distinctive ( Fig. 6H View Fig ).
Remarks
Compared with the other five Solomon Islands species in this group, C. fraternum sp. nov. is very similar in size to C. brachypterum sp. nov., but with longer antennae. Compared to C. greensladei sp. nov., which it also much resembles, it is smaller and with shorter antennae. The aedeagus of the male provides decisive characters.
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