Metapocyrtus (Orthocyrtus) villalobosae Patano, Amoroso, Mohagan, Guiang & Yap 2021

Autor: Cabras, Analyn A., Cudera, Rizalyn, Mamon, Joelyn, Medina, Milton Norman D.
Rok vydání: 2022
Předmět:
DOI: 10.5281/zenodo.7019334
Popis: Metapocyrtus (Orthocyrtus) villalobosae Patano, Amoroso, Mohagan, Guiang & Yap, 2021 Metapocyrtus (Artapocyrtus) villalobosae Patano et al., 2021: 284 Type locality. Mount Kabunulan, Hamiguitan Range, Surop, Governor Generoso, Davao Oriental, 6°27'44.29"N, 126°10'18.15"E, 400 m a.s.l. Type depository. CMUZS. Material examined. 4♂♂, 2♀♀: Philippines - Mindanao / San Isidro / Oriental / December, 2021 / coll. LC (typed on white card). Presently in UMCRC. Remarks. Patano et al. (2021) recently described a new species Metapocyrtus (Artapocyrtus) villalobosae under the subgenus Metapocyrtus Artapocyrtus based on four specimens collected at Mount Kabunulan, Hamiguitan Range in Governor Generso, Davao Oriental at an elevation of 400 m. Based on the images of the male and female habitus described in the original paper (Patano et al. 2021: 285, fig. 3) with a size ranging from 13.2-14.5 mm and a holotype of 14.5 mm, it doubtlessly belongs to Orthocyrtus based on its size, shape of the rostrum, as well as the general shape of the male and female habitus. In 2021, specimens that appeared to belong to Metapocyrtus (Artapocyrtus) villalobosae from San Isidro, Davao Oriental, which is part of the range of Mt. Hamiguitan, were donated to UMCRC. Upon examination, the said specimens were found to be very similar to the male holotype, and female paratype in the paper of Patano et al. (2021). The only difference is the short longitudinal subbasal stripes which we believe are simply part of the variability of the species. We believe it was wrongly placed in the subgenus Metapocyrtus Artapocyrtus and thus, we are proposing that it be transferred to the subgenus Metapocyrtus Orthocyrtus based on the characters mentioned by Cabras et al. (2018) including the shape of its rostrum (Fig. 21). Furthermore, while the species elytral patterns may have a superficial resemblance to M. (Sclerocyrtus) chamissoi Schultze, 1925, it is actually more closely related to M. (Orthocyrtus) davaoensis Cabras, Medina & Bollino, 2021 described from Davao City and Bukidnon. The general habitus of the male and female, the elytral and pronotal patterns as well as the genitalia are also very similar. Molecular data and/or eversion of the endophallus in the near future can be used in delineating the Metapocyrtus davaoensis species group which seems to have a widespread form and distribution throughout Mindanao. Eversion of the endophallus in the tribe Pachyrhynchini is quite challenging to accomplish and needs alot of specimens as mentioned by Bollino and Sandel (2017) and Cabras et al. (2018). Key to species of Metapocyrtus (Orthocyrtus) [table omitted] Notes on the habitat of Metapocyrtus (Orthocyrtus) Metapocyrtus melibengoy sp. nov. and Metapocyrtus (Orthocyrtus) Metapocyrtus flomlok sp. nov. Metapocyrtus (Orthocyrtus) melibengoy sp. nov. was collected from forest vegetation along the Salacafe trail leading to Lake Holon, at an elevation of 1200 m (Fig. 22). Lake Holon is a caldera of Mt. Parker, a potentially active stratovolcano in southern Mindanao. The specimens were collected on leaves of a Melastoma sp. (Melastomataceae), Piper aduncum (Piperaceae), and Cyathea spp. (Cyatheaceae) in a partially open area of the trail. The area where the specimens were collected, roughly 9 km from the Barangay Salacafe, serves as the receiving area. The trail to Lake Holon is quite open, with various species of ferns, grasses, and shrubs, and an abundance of pitcher plants and other angiosperms. On the initial ascent to the lake, the trail is quite open with some portions having been converted into farmlands planted with Zea mays ssp. Mays (Poaceae), Coffea spp. (Rubiaceae), and Musa textilis (Musaceae). As for Metapocyrtus (Orthocyrtus) flomlok sp. nov., it was collected in an open and quite degraded area in Polomolok, South Cotabato, near a pineapple plantation at an elevation of 1021 m. The new species was collected on a slope near a small creek with pristine waters (Fig. 23). It was found on the leaves of buyo-buyo (Piper aduncum) and avocado (Persea americana). During personal correspondence with Stan Cabigas, he mentioned and showed photos of the same species from Mt. Matutum together with its possible model/mimic - Pachyrhynchus gilvomaculatus Yoshitake, 2016. Thus, we believe that the population near the pineapple plantation is the remnant population that survived the degradation of the forested habitats and conversion of land in Polomolok. A similar scenario has been observed with M. (Orthocyrtus) davaoensis described based on a limited number of specimens near the lowland of Carmen, Davao City. In our recent surveys of the higher elevation and more forested part of Carmen, a huge thriving population of M. (O.) davaoensis was found.
Published as part of Cabras, Analyn A., Cudera, Rizalyn, Mamon, Joelyn & Medina, Milton Norman D., 2022, Two new species of Metapocyrtus (Orthocyrtus) Heller, 1912 (Coleoptera, Curculionidae, Entiminae) from southern Mindanao, Philippines, with ecological notes, pp. 133-147 in ZooKeys 1116 on page 133, DOI: 10.3897/zookeys.1116.83236
{"references":["Patano, R, Amoroso, V, Mohagan, A, Guiang, MM, Yap, S, 2021. Two new species of the genus Metapocyrtus Heller, 1912 (Coleoptera: Curculionidae: Entiminae), from Mindanao Island and an updated checklist of Metapocyrtus species in the Philippines. The Raffles Bulletin of Zoology 69: 282 - 303","Cabras, A, Medina, MN, Bollino, M, 2018. A new species of the subgenus Orthocyrtus Heller, 1912, genus Metapocyrtus Heller, 1912 (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini) from Mindanao, with notes on its ecology. Baltic Journal of Coleopterology 18 (1): 39 - 46","Bollino, M, Sandel, F, 2017. Two new taxa of the Subgenus Artapocyrtus Heller, 1912, Genus Metapocyrtus Heller, 1912 from the Philippines (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini). Baltic Journal of Coleopterology 17 (1): 1 - 14"]}
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