Paromalus fujisanus Lewis, 1892: 34 [Japan: Honshû]; Cooman, 1937: 160.
Platylomalus fujisanus: Hisamatsu, 1968: 31 [Shikoku]; 1985: 224 [photo]; Kryzhanovskij and Reichardt, 1976: 276; Mazur, 1984: 134; Ôhara, 1994, 174.
Japanese name: Fuji-chibi-hirata-emma-mushi.
Oblong-oval, rather convex, black, shining, punctured above; the head rather broad, impressed in front, stria complete, surface clearly and evenly, not thickly punctured; the thorax, stria complete and strong at the sides, very fine behind the head, wholly punctured, with a distinct scutellar fovea visible amongst the punctures, anterior angles rather depressed, anterior margin impressed behind the eyes; the elytra punctured like the thorax except in the sutural area before the apex, where the punctures are oblong, epipleural stria continues along the apex and turns round the sutural angle, one oblique obsolete stria; the propygidium sparsely and evenly punctulate; the pygidium in the male has a raised exterior margin, and within the margin the whole surface is evenly vermiculate in sculpture, in the female the pygidium is immarginate, irregularly and sparsely punctured at the base, nearly smooth at the apex; the prosternum bistriate, striae parallel at the sides, bent inwards at either end, keel with a few punctures very irregularly set, anterior lobe somewhat straight on the anterior edge and sparsely punctured; the mesosternum, transverse stria middle part nearly straight, arcuate on each side, not angulate, suture not apparent, surface sparsely punctulate; the metasternum with large punctures between the intermediate and posterior coxae, punctures gradually becoming finer on the median area and especially behind the mesosternum; anterior tibiae 4-dentate.
This species must be placed next to P. bistriatus, Er., from America.
Hab. Japan. I obtained a considerable number of specimens at Kiga, Hakone, Subashiri, and Nikko."
Redescription (Ohara, 1994).
Description. Male and female. Body length, PPL, male, 1.62 - 1.97 mm (1.82 ± 0.03, n=13), female, 1.56 - 2.01 mm (1.76 ± 0.04, n=13), PEL, male, 1.52 - 1.85 mm (1.70 ± 0.03, n=13), 1.50 - 1.77 mm (1.64 ± 0.02, n=13). Width, male, 1.00 - 1.18 mm (1.10 ± 0.02, n=13), female, 0.99 - 1.14 mm (1.08 ± 0.01, n=13). Biometric data are given in Table 30. Body oblong, black and shining; femora, tarsi, mouthparts and antennae red brown.
Frontal stria of head weakly carinate and complete. Disk of head sparsely clothed with fine and deep punctures, which are separated by two to four times their diameter and become denser apically.
Pronotal sides (Fig. 97A) evenly and rather strongly convergent to apices. Surface of pronotum weakly depressed behind eyes. Marginal stria weakly carinate and complete laterally and apically. Disk of pronotum evenly and moderately punctate except near the apical angles and behind eyes, the impunctate areas being clothed with microscopic punctures only; the moderate-sized punctures becoming denser and finer on lateral third and becoming coarser along basal margin, with the microscopic punctures intermingled. Antescutellar area with a shallow and longitudinal depression.
Epipleural marginal stria present on apical half and well impressed. Marginal elytral stria deeply impressed and complete, its apical end extended along apical margin of elytron, attaining to sutural angle, then inwardly bent, and shortly extended anteriorly. Epipleura impunctate, rarely clothed with microscopic punctures, and with coarse rugae medially. Disk of elytra evenly and coarsely punctate except on a narrow band along the suture, which is clothed with microscopic punctures and feebly elevated, and on extreme apical band; the coarse punctures somewhat longitudinal and separated by their own diameter to thrice the diameter, becoming coarser around scutellum and near oblique depression, their interspaces with microscopic punctures intermingled. Dorsal stria absent, but oblique and shallow depressions present on laterobasal half.
Propygidium sparsely covered with coarse, shallow and round punctures, which become sparser and finer laterally and basally. Pygidium (Fig. 97C) evenly covered with fine punctures, which are separated by twice their diameter; some other oblong, shallow and large punctures present near the basal margin. In female, whole surface except for a narrow area along margin evenly covered with vermicular sculptures (Fig. 97C).
Anterior margin of prosternal lobe (Fig. 97B) truncate anteriorly; marginal stria of lobe absent; basal angles strongly carinate and its insides deeply depressed; disk irregularly scattered with moderate or coarse and deep punctures, which are separated by two to five times their diameter. Prosternal process completely with carinal striae, which are well impressed and feebly divergent apically; disk sparsely and finely punctate. Lateral descending stria short and strongly carinate.
Anterior margin of mesosternum strongly emarginate at middle; marginal stria absent anteriorly, but complete and well impressed laterally, its basal end strongly bent inwards and apical end continued to lateral metasternal stria; disk with punctation similar to that of prosternal process; transverse stria well impressed, straight on middle part, and obliquely and posteriorly arcuate on each side, usually not angulate (sometimes angulate). Meso-metasternal suture indistinct. Intercoxal disk of metasternum evenly covered with longitudinal and moderate punctures, which are separated by their own diameter to twice the diameter, and become finer medially and coarser laterally. Lateral disk covered with few large punctures around margin. Lateral metasternal stria well impressed, extending obliquely and posteriorly and attaining to near apical third.
Intercoxal disk of 1st abdominal sternum evenly covered with oblong and coarse punctures, which become finer medially and are separated by two to four times their diameter. First abdominal stria complete and well impressed.
Protibia with 4 denticles on outer margin. Mesotibia with 3 spinules on outer margin. Metatibia with 2 spinules near the apex.
Male genitalia as shown in Fig. 98.
Table 30. Biometric data of Platylomalus fujisanus (Lewis).
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Male Female
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APW 0.47-0.57 (0.53± 0.01) 13 0.47-0.55 (0.51± 0.01) 13
PPW 0.95-1.12 (1.02± 0.02) 13 0.91-1.06 (0.99± 0.01) 13
PL 0.51-0.67 (0.59± 0.01) 13 0.55-0.65 (0.59± 0.01) 13
EL 0.89-1.10 (1.02± 0.02) 13 0.85-1.12 (1.00± 0.02) 13
EW 1.00-1.18 (1.10± 0.02) 13 0.99-1.14 (1.08± 0.01) 13
ProW 0.47-0.59 (0.53± 0.01) 13 0.49-0.59 (0.55± 0.01) 13
ProL 0.12-0.20 (0.18± 0.01) 13 0.16-0.55 (0.38± 0.05) 13
PyL 0.22-0.32 (0.26± 0.01) 13 0.24-0.32 (0.27± 0.01) 13
PTL 0.35-0.43 (0.40± 0.01) 13 0.35-0.45 (0.40± 0.01) 13
MSTL 0.33-0.43 (0.38± 0.01) 13 0.33-0.39 (0.37±0.005) 12
MTTL 0.45-0.53 (0.50±0.005) 13 0.39-0.45 (0.42± 0.01) 13
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Specimens examined. [Honshû] <Aomori-ken> 1Åä, Towada, 16-19/vi/1968, H. Takizawa leg. <Nagano-ken> 1 ex., Togakushi, 9/viii/1963, Y. Kishi leg.; 1 ex., Agematsu, Koma-ga-take, 12/vi/1949, S. Ôsawa and T. Nakane leg. <Gifu-ken> 2ÅâÅâ3ÅäÅä, Kammuri-yama-tôge, Tokuyama-mura, 10/x/1986, 26/xi/1988, Y. Takai leg. <Mie-ken> 1 ex., Okimi Pass, 12/vi/1952, H. Ishida leg. <Wakayama-ken> Gomadan, 27/viii/1967, M. Yoshida leg. <Hyôgo-ken> 2 exs., Hataganaru, 24, 26/vi/1955, T. Nakane leg.; 1Åâ, Hyônosen, 27/iv/1986, T. Itô leg. <Tottori-ken> 1 ex., Daisen, 26/iv/1942, K. Sakaguchi leg.; 1 ex., Ditto, 6/vi/1955, K. Sawada leg.; 1 ex., Ditto, 11/vii/1948, M. Iga leg.; 3 exs., Ditto, Hôki, 800m, 4/viii/1942, M. Azuma leg. <Sado Is.> 1Åâ, Tataramine, Sado Is., 28/vii/1947, M. Iga leg.
[Kyûshû] <Fukuoka-ken> 2ÅâÅâ1Åä, Mt. Hiko-san, 23/x/1985, M. Ôhara leg. <Kumamoto-ken> 1Åä, Shiraga-dake, 13/v/1984, M. Ôhara leg. <Miyazaki-ken> 1 ex., Mt. Sobo, 10-12/v/1967, H. Takizawa leg.
Distribution. Japan (Honshû, Kyûshû). New to Kyûshû.
Remarks. Platylomlaus fujisanus resembles P. viaticus superficially, but they can readily be distinguished by several characters given in the key and description.
Little is known about the habitats of this species. Some specimens were collected under bark.
[Honshu] Aomori-ken: Fuyubegawa, Kodomari-mura (2 exs., 18/viii/1974, APM), A. Abe; Mt. Rangannomori, Ajigasawa-machi (2 exs., 27, 30/vii/1987, APM), A. Abe; Nanatsutaki, Kodomai-mura (1 ex., 18/v/1975, APM), A. Abe. Fukushima-ken: Sui-sawa-gentô, 700 m, Eboshi-rindo, Kanayama (1 ex., 2/vii/1995, collected from Fungi), K. Haga.
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