CYCLOPOIDA Rafinesque, 1815

Fiers, Frank & Van Damme, Kay, 2017, Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive, Journal of Natural History 51 (41 - 42), pp. 2463-2507 : 2465-2466

Order CYCLOPOIDA Rafinesque, 1815

Family CYCLOPIDAE Rafinesque, 1815 Sufamily CYCLOPINAE Kiefer, 1927

Genus Thalamocyclops gen. nov.

Bryocyclops in Mirabdullayev, Van Damme & Dumont, 2002

Diagnosis

Medium-sized Cyclopinae with depressed body markedly divided in prosome and urosome; genital double-somite wide with leg 5 vestiges located in anterior half, above frontal plane; seminal receptacle small, solely expanded frontally; caudal rami and anal operculum variable, former with six elements, latter either crescentic or triangular produced; terminal median setae on caudal rami with breaking plane; female antennule 10- segmented at most, with ancestral segments VI –XI fused; male antennule 15/16-segmented in male, with three aesthetascs on first segment; antenna four-segmented (coxobasis + three segments) without exopodal element; mandibular palp absent, represented by single seta; maxillule and maxilla conform cyclopid type; maxilliped four-segmented with two, one, one and two elements, either lanceolate or long and pinnate; leg 1 coxa with medial seta, legs 2–4 without; intercoxal sclerites with prominent triangular distal corners; both rami of legs 1–3 and exopodite of leg 4 two-segmented; female leg 4 endopodite one-segmented with original segmental morphology unchanged, or markedly ovate, globular and complex; male leg 4 endopodite two-segmented with typical segmental morphology; spine formula of terminal exopodite segments: 3.3 .3.3, setal formula 5.5.5.4; proximal exopodite segments lacking medial seta; male leg 3 endopodite with modified armament: outer apical spine smooth or partially serrate; leg 5 completely confluent with pediger, ancestral basal segment undifferentiated, represented by single seta, ancestral distal segment prominently distinct, truncated, with two elements: medial one spiniform, outer one setiform. Female and male leg 6 vestiges with three elements: medial one spiniform, middle and outer elements setiform.

Contents

Thalamocyclops pachypes sp. nov., designated herein as type species.

Other species: Bryocyclops soqotraensis Mirabdullayev, Van Damme & Dumont, 2002 (= Thalamocyclops soqotraensis ( Mirabdullayev, Van Damme & Dumont, 2002)) comb. nov. Etymology

Thalamocyclops is a combination of thalamos (Greek for interior, inside room, behind closed doors) and the nominal generic name Cyclops , referring to the hidden and secret occurrence of the type species and its congener in crevices of karstified limestone. Gender masculine.