Kliecope mihoensis, Tanaka & Tsukagoshi & Karanovic, 2014

Tanaka, Hayato, Tsukagoshi, Akira & Karanovic, Ivana, 2014, Molecular phylogeny of interstitial Polycopidae ostracods (Crustacea) and descriptions of a new genus and four new species, Zoological Journal of the Linnean Society 172 (2), pp. 282-317 : 286-292

publication ID	https://doi.org/ 10.1111/zoj.12176
DOI	https://doi.org/10.5281/zenodo.10542090
persistent identifier	https://treatment.plazi.org/id/03AEFF7E-FFF4-FFAC-FF2F-F22AFA829581
treatment provided by	Marcus
scientific name	Kliecope mihoensis
status	sp. nov.

Treatment

KLIECOPE MIHOENSIS View in CoL SP. NOV. ( FIGS 2–8 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 View Figure 7 View Figure 8 )

Type series

Holotype: adult male (SUM-CO-2178), Right valve length 151 μm and height 92 μm, left valve length 145 μm and height 87 μm, soft parts mounted on slide and valves preserved in a cardboard cell slide, Paratypes: 12 adult males (SUM-CO-2179–2190) and eight adult females (SUM-CO-2191–2198).

Type locality

The holotype specimen was collected from the Mihomasaki Beach , Shizuoka City, Shizuoka Prefecture, the Pacific coast of central Japan, 35°01′15′′N, 138°30′58′′E ( Fig. 1B View Figure 1 ), on 4 July 2013; interstitial environment at 50 cm below the sand surface at 6 m inland from the low tide shoreline. The substrate consisted mainly of granular gravel GoogleMaps .

Diagnosis

Carapace elliptical and dorsal line straight in lateral view. Carapace surface covered with a number of small, shallow pits. Serration along anteroventral margin with 16 sharp processes in right valve. Anteroventral region of marginal infold widened.

Description of adult male

Carapace ( Figs 2 View Figure 2 , 3A–E View Figure 3 , 4 View Figure 4 ). Right valve length 146– 156 μm and height 91–98 μm, left valve length 141– 147 μm and height 86–94 μm ( Table 2). Carapace elliptical and dorsal line straight in lateral view. Carapace anterior half surface covered with a number of shallow pits ( Fig. 3A, B View Figure 3 ). A number of thin serrations on anteroventral margin of left valve. Serration along anterior margin with 16 sharp processes on right valve ( Fig. 2 View Figure 2 ). Adductor muscle scars round and consisting of three closely spaced scars ( Fig. 2 View Figure 2 ). Marginal infold of each valve developed along anterior to mid-ventral margins ( Figs 3C, D View Figure 3 , 4B, G View Figure 4 ). Along inner margin of right valve, bar and groove on mid-dorsal to midventral ( Fig. 4A, B View Figure 4 ), one socket (part of hinge structure) developed at dorsal end ( Fig. 4C View Figure 4 ), posterior bar on mid-dorsal to posterior end ( Fig. 4D View Figure 4 ), posterior element of hinge structure ( Fig. 4E View Figure 4 ), and ridge on posterior end to mid-ventral ( Fig. 4F View Figure 4 ). Along inner margin of left valve, bar and groove on anterodorsal to dorsal end ( Fig. 4H View Figure 4 ), one knob (part of hinge structure) developed at dorsal end ( Fig. 4I View Figure 4 ), bar on mid-dorsal to posterior end ( Fig. 4J View Figure 4 ), posterior element of hinge structure ( Fig. 4K View Figure 4 ), and bar along posteroventral margin ( Fig. 4L View Figure 4 ).

Bellonci organ. Absent.

Upper lip ( Figs 5A View Figure 5 , 6A View Figure 6 ). Dorsal round and ventrally straight, and distal part elongated semicircular dorsally in lateral view.

Antennula ( Figs 5B View Figure 5 , 6B–D View Figure 6 ). Uniramous, four articulated podomeres. First podomere rectangular, with tufts of setulae on dorsal margin, lateral surface. Second podomere almost same length as first podomere, with one annulated seta at dorsoproximal end, two tufts of setulae on dorsal margin ( Fig. 6B View Figure 6 ). Third podomere about three-quarters as long as first podomere, with one short seta at dorsodistal end and four ventrodistal setae consisting of one seta with large disc-shaped sucker, one annulated seta with small disc-shaped sucker, one seta with comb-like setulae, and one simple seta ( Fig. 6C, D View Figure 6 ). Fourth podomere small, with three medium and two long annulated setae.

Antenna ( Figs 5C, D View Figure 5 , 6E View Figure 6 ). Typically biramous, with exopodite and endopodite consisting of nine and three podomeres, respectively. Basis rectangular, tapered distally. Exopodite: first podomere about half as long as basis. Podomere length decreasing in size from second to eighth, each podomere with one long annulated seta; ninth (distal-most) podomere very small, with one long annulated seta with short process, one medium seta, and one short seta at distal end. Endopodite: first podomere about half as long as basis. Second podomere two-thirds as long as first podomere, with three short setae along dorsal margin, and six annulated setae at distal consisting of two long, one long with some spines, two medium, one short. Third podomere one-quarter as long as first podomere, with one slender, hookshaped claw extending backward ( Fig. 6E View Figure 6 ), one long annulated seta at ventral margin, and one long annulated, one medium annulated, and one short setae at distal end.

Mandibula ( Fig. 5E View Figure 5 ). Coxal endite with four sharp teeth. Basis with three plumose setae on ventral margin. Exopodite absent. Endopodite consisting of two podomeres. First podomere with one plumose seta on ventral margin near proximal end and two long, setulous annulated setae at dorsodistal end. Second podomere very small, bearing one medially plumose and one stout setulous annulated seta.

Maxillula ( Fig. 5F, F′ View Figure 5 , F″). Precoxa ( Fig. 5F′ View Figure 5 ) with eight plumose setae of different lengths. Coxa ( Fig. 5F View Figure 5 ″) with two short plumose setae on lateral surface near ventroproximal margin, and three long plumose setae on ventral margin. Basis with one medium and one long plumose setae on ventral margin. First podomere of endopodite with one short seta dorsodistally, and two long annulated setae at ventroproximal margin. Second podomere, with two long annulated setae, and two long, stout setulous setae with few bilateral spines. Exopodite consisting of two podomeres. First podomere with one tuft of setulae on dorsal margin. Second podomere with one very long setae and five long setae on ventral margin, and one tuft of setulae on dorsal margin.

Fifth limb ( Fig. 5G View Figure 5 ). Coxa bearing epipodite with ten long plumose setae, and two short setulous setae on dorsodistal margin. Basis with two plumose setae along dorsal margin, one slender setulous seta on ventral margin. Endopodite with two long plumose setae. Exopodite one stout, short setulous seta.

Uropod ( Figs 6F View Figure 6 , 7A View Figure 7 ). Both lamellae with six stout claws and one tuft of setulae anteroventral end.

Male copulatory organ ( Figs 6F View Figure 6 , 7A View Figure 7 ). Arising from outer surface of body on left side of terminal trunk segment as a hook-shaped, slender tube.

Description of adult female

Mandibula, maxillula, and fifth limb similar to those of adult male.

Carapace ( Fig. 3F–J View Figure 3 ). Right valve length 158– 169 μm and height 93–103 μm, left valve length 149– 162 μm and height 88–100 μm ( Table 2).

Upper lip ( Fig. 8A View Figure 8 ). Semicircular in lateral view.

Antennula ( Fig. 8B View Figure 8 ). First podomere rectangular, with tufts of setulae on dorsal margin, lateral surface. Second podomere almost same length as first podomere, with one annulated setulous seta at dorsoproximal end, two tufts of setulae on dorsal margin. Third podomere about three-quarters as long as first podomere, with one short seta at dorsodistal end and one ventrodistal seta. Fourth podomere small, with five annulated setae.

Antenna ( Fig. 8C View Figure 8 ). Only second and third podomeres of endopodite differing from those of adult male. Second podomere half as long as first podomere, with one short setulous seta along dorsal margin, and five

LV, left valve; RV, right valve.

annulated setae at distal consisting of two long, one long with some spines, two medium. Third podomere one-quarter as long as first podomere, with one long annulated seta at ventral margin, and one long annulated, one medium annulated and one short seta at distal end.

Uropod ( Fig. 7B View Figure 7 ). Both lamellae with six stout claws and one row of setae on anteroventral lateral surface.

Female copulatory organ ( Fig. 7B View Figure 7 ). Female spermatheca cylindrical in lateral view.

Dimensions

See Table 2.

Distribution

Shichigahama [Miyagi Prefecture (Pref.) 38°17′08′′N, 141°03′80′′E], Toyooka Beach (Chiba Pref. 35°03′04′′N, 139°49′55′′E) GoogleMaps , Hiratsuka (Kanagawa Pref. 35°18′48′′N, 139°22′01′′E) GoogleMaps , Kouzu (Kanagawa Pref. 35°16′40′′N, 139°12′34′′E) GoogleMaps , Orange Beach (Shizuoka Pref. 34°58′37′′N, 139°05′44′′E) GoogleMaps , Ohura Beach (Shizuoka Pref. 34°40′05′′N, 138°56′28′′E) GoogleMaps , Miho-masaki Beach (Shizuoka Pref. type locality, 35°01′15′′N, 138°30′58′′E) GoogleMaps , Awaji-tsuna (Hyogo Pref. 34°26′21′′N, 134°54′41′′E) GoogleMaps , Nushima (Hyogo Pref. 34°10′04′′N, 134°48′52′′E) GoogleMaps , Izari (Tokushima Pref. 33°48′07′N, 134°40′08′′E) , Ukitsu (Kochi Pref. 33°17′18′′N, 134°08′42′′E) GoogleMaps , Kashiwajima (Kochi Pref. 32°46′02′′N, 132°37′38′′E) GoogleMaps ; Aira-fukuyama (Kagoshima Pref. 31°41′00′′N, 130°48′41′′E) GoogleMaps . All specimens were collected by Hayato Tanaka from interstitial water in Japan.

Etymology

This species is named after the type locality, Mihomasaki Beach.

Remarks

The morphology of Kliecope mihoensis sp. nov. is similar to Parapolycope aidae ( Hartmann, 1959) from Los Cobanos in El Salvador, Parapolycope noodti ( Hartmann, 1959) from Cristóbal in Panama, and Parapolycope minuta ( Hartmann, 1974) from Xai-Xai in Mozambique. The males of Pa. minuta possess cross-shaped (kreuzförmig) seta on the antennula, and the other two species unusually do not have sexually dimorphic antennula. In addition, Kliecope mihoensis has two plumose setae on the basis of fifth limb and Pa. minuta has three.