Trypophloeus alni

Overview & Synopsis

Trypophloeus alni (Lindemann, 1875)Cryphalus alni Lindemann, 1875 a: 136= Trypophloeus holdhausi Wichmann, 1912: 186Examined material:Trypophloeus alni (Lindemann, 1875). Type material: Lindemann’s syntypes of Cryphalus alni are not preserved in ZMMU where they were expected to be kept. However, some of Lindemann’s specimens were located in NHMW. Lectotype is designated here from the NHMW. Lectotype: ♀ Trypophloeus alni (Lindemann, 1875). Mosqua//Lindemann//Collect Türk.// Cryphalus alni Lind. Typ [in handwriting] // TYPUS [on red paper, printed] // Lectotypus Cryphalus alni Lindemann, 1875 designated by Mandelshtam (date marked on label as 2006, but in fact lectotype is designated only in the current paper)// Trypophloeus alni (Lindemann, 1875) det. Mandelshtam, 2006 NHMW; Paralectotypes, 7 ex. with same collecting label: Lindemann// Mosqua// NHMW.Trypophloeus holdhausi. Holotype: Trypophloeus holdhausi Wichmann, 1912: Holdhaus, Campo-Grosso// bei Rovereda, Süd Tirol // TYPUS [printed, on red paper] // Trypophloeus Holdhausi n. sp. ♀ Type 1912 det. Wichmann, 1912 // Holdhausi Wichm. Ti. m// Trypophloeus alni (Lindemann, 1875) det. Mandelshtam, 2006. Type is located in NHMW.Additional material. ESTONIA: 2 exx. Estland, Leliland, 10.VIII.1937, J. Hristian, 113, NHMW. RUSSIA, Leningrad Province: 2 exx. Lesnoy, Petrograd, 25.IV.[1]915, Spessivtsev leg., ZIN; 2 exx. Beloostrov, Sestra River Bank, riverflooded forest, forest with Alnus and Prunus padus, under bark of fallen Alnus incana thick branches, 23.IV.1990, M.Yu. Mandelshtam leg., ZIN; 11 exx. Orzhitsy, Lomonosov District, park, under bark of fallen stem of Alnus incana, 20.VIII.2001, M.Yu. Mandelshtam leg., ZIN; 1 ex. RUSSIA, Pskov Province, Sebezh District, Sebezh National Park, Osyno Forestry, under bark of Alnus incana cut stem, VII.2002, Mandelshtam leg., ZIN; RUSSIA, Arkhangelsk Province: 12 exx. 1851 alder, Vel’sk, Vologda Government, 23.VIII.1929, G.K. Pjatnitskiy leg., ZIN; 33 exx. under number 1855, 3.IX.1929; 57 exx. under number 1854, ZIN; RUSSIA, Yaroslavl Province, 3 exx. Poshekhonsk forestry, Yaroslavl Government, standing dead willow, 20 years, 17.VII.1928, G. Pjatnitskiy leg., ZIN; RUSSIA, Moscow Province: 1 ex. Bol’shevo Station, in the bark of stem of alder, 15.IV.1925, S. Shorokhov leg., ZIN; 1 ex. ZMMU; 1 ex. Bol’shevo Station, in the bark of growing drying alder, 06. VI.1925, S. Shorokhov leg., ZIN; 2 exx. Bol’shevo Station, in the bark of growing drying alder, 14. VI.1925, S. Shorokhov leg., ZMMU; 2 exx. Bol’shevo Station, alder, 14. VI.1926, ZIN; 2 exx. Zvenigorod Biological Station of Moscow State University, window trap, 23.V.1981, M. Samkov leg. (V. Gratchev coll.), ZMMU; 1 ex. Zvenigorod Biological Station of Moscow State University, 30. VI.1981, M. Samkov leg. (V. Gratchev coll.), ZMMU; 1 ex. Zagorsk District, Malinniki village, waterfall “Gremyachiy”, aspen stem, 22. V.1982, A.Petrov leg., ZMMU; 1 ex. Zvenigorod, 22.III.1989, M.Yu. Mandelshtam leg., ZIN; 3 exx. Morozky, window trap on the elm No. 2, 25.IV–18. V.1994, Nikitsky leg., ZMMU; 2 exx. Mozhaiskyi District, near village Osiritsi, window trap 5, 22.IV.–28. V.2009 Nikitsky leg., ZMMU; RUSSIA, Bryansk Province: 4 exx. Bryansk, Orlov Gouvernement, 22.VII.[1]926, V. Stark leg., ZIN; RUSSIA, Permsk Province: 1 ex. Middle Ural, environment. of Gubakha, Molotov Province (nowadays Permsk Province), alder, water-flooded forest of Kos’va River, square. 265, 28.XI.1952, Zinovjev leg., ZIN; 2 exx. environment. of Molotov (nowadays – Perm), Mysy village, 07. V.1953, G. Zinovjev leg., ZIN; 9 exx. environment. of Molotov (nowadays – Perm), Mysy village, 13. V.1953, G. Zinovjev leg., ZIN; 3 exx. Mysy village, Krasnok [utskiy] District, alder, 07. VI.1953, G. Zinovjev leg., ZIN; RUSSIA, Kemerovo Province: 1 ex. Kemerovo, on willow, “intermediate form between T. alni and T. rybinski ” [B. Sokanovskij note], ZMMU; 3 exx. Aspen Plateau, willow, M. Lurie leg.; “ Tr. alni v. rybinskyi Rtt. B. Sokanovskij det. 57”, ZIN; PATRIA IGNOTA: 2 exx. 1930 Karl Schedl 135, NHMW; 8 exx. 1930 Karl Schedl 741, NHMW.General distribution: Austria, Belarus, Estonia, Finland, Germany, Norway, Poland, Switzerland, European part of Russia (Northern and Central Territories), West Siberia (Knížek 2011, Kvamme & Lindelöw 2014).Comments. Reports of the species from Italy is erroneous. It is based on incorrect assignment of Campo-Grosso to Italy, but in fact this locality is in Switzerland.T. alni is listed from China (Hua 2002, Knížek 2011), including Xinjiang and Sichuan. The general distribution indicates that this most probably is erroneous and might refer either to T. dejevi or to a still undescribed species (cf. Knížek 2011).No specimens from Ukraine were found in available collections.Host trees: Alnus glutinosa, A. incana. Much more common in A. incana.In China T. alni is mentioned to infest Alnus and Populus davidiana (Hua 2002). However, since we evaluate the occurrence of T. alni in China to be doubtful, we do not delete this information until new documentation is available.Re-description. Body: small, slim and strongly elongated, 1.2–1.6 mm, 3.0–3.25 times as long as wide, dark brown to black. Frons: weakly convex, shallowly reticulated from upper level of eyes to vertex; vertex entirely reticulated. Frontal pubescence consists of inconspicuous sparse hairs, vertex glabrous. Pronotum: triangular of equal length and width at base, widest posterior of tuberculated area, summit at middle. Asperities in front of summit abundant, rather small, conical, their height is equal to width at base, apically sharpened, basically not fused, not arranged in regular rows. Number of tubercles at pronotal, anterior margin variable. Pronotal vestiture consists of short, fine hairs with hair-like scales intermixed, the latter more abundant nearby base. Setae directed backward at tuberculated area and forward at the posterior area. Elytra: as long as wide, 2.2 (2.08–2.33), just a little wider than pronotum (1.0–1.1), sides parallel on basal two thirds, narrowly rounded at apex. Striae distinctly impressed throughout their length, with elongated punctures; interstriae slightly raised. Strial punctures with short hair-like setae, interstriae with ground vestiture of recumbent hair-like setae replaced with scale-like setae at declivity and each with a single row of long erect hair-like scales.Diagnosis. Rather similar to Trypophloeus dejevi and T. nitidus and sharing with these two species the reticulated (not aciculated) surface of the upper portion of frons and vertex. Can be distinguished from both species by more elongated elytra and by acute, not merging asperities at tuberculated area. T. rybinskii, one more species without spines and granules at male elytral declivity, has aciculated surface of the upper portion of frons, indistinct elytral striae and much stouter body. The smallest of the species in the species group (Figure 5).