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| กิ้งกือกระบอกเล็กลายเสือสหายมังกร Siliquobolellus amicusdraconis; กิ้งกือกระบอกเล็กลายเสือประสารกก S. prasankokae Pimvichai, Enghoff, Panha & Backeljau, 2022 DOI: 10.3897/zse.98.90032 |
Abstract
A new genus of the millipede family Pseudospirobolellidae, Siliquobolellus gen. nov., is described from limestone mountains in Thailand, based on three new species, viz. Siliquobolellus amicusdraconis gen. et sp. nov. from Uthaithani Province, Siliquobolellus constrictus gen. et sp. nov. from Prachuap Khiri Khan Province and Siliquobolellus prasankokae gen. et sp. nov. (type species) from Lampang Province. The descriptions are based on gonopod morphology and mitochondrial DNA data (COI barcodes). The COI barcodes grouped the three new species in a well-supported Siliquobolellus gen. nov. clade. The mean interspecific COI sequence divergence among the three new species was 12% (range: 8–15%). The mean intergeneric COI sequence divergence between Siliquobolellus gen. nov., Coxobolellus Pimvichai, Enghoff, Panha & Backeljau, 2020, and Pseudospirobolellus Carl, 1912 was 19% (range: 14–23%). Three conspicuous gonopodal synapomorphies differentiate Siliquobolellus gen. nov. from other pseudospirobollellid genera: (1) the telopodital part of the posterior gonopod forms a deep concavity, (2) the telopodite of the anterior gonopod is directed distad and does not reach the tip of the coxal part of the anterior gonopod, and (3) the tip of the anterior gonopod coxa is narrowed, curving mesad. As such, the monophyly of the new genus is well supported by both morphological and mitochondrial DNA data. A distribution map and an identification key to the species are provided.
Key Words: COI, gonopod, monophyly, synapomorphy
Class Diplopoda de Blainville in Gervais, 1844
Order Spirobolida Bollman, 1893
Suborder Spirobolidea Bollman, 1893
Family Pseudospirobolellidae Brölemann, 1913
Genus Siliquobolellus gen. nov.
Etymology: From Latin siliqua = pod, and referring to the podlike shape of the gonopod telopodite.
Diagnosis: Siliquobolellus species are characterised by (1) the unique shape of the telopodital part of their posterior gonopod, which forms a deep concavity. In contrast, the telopodital part of the posterior gonopod is extremely slender and sickle-shaped in Pseudospirobolellus, does not form a deep concavity in Coxobolellus, or is slender with a broad apical canopy in Benoitolus; (2) the telopodite of anterior gonopod (at) simple, directed distad, not reaching tip of coxal part of the anterior gonopod (cx). In contrast, the telopodite of anterior gonopod (at) is overreaching coxa in the other three genera; and (3) tip of anterior gonopod coxa narrowed, curving mesad. In contrast the tip of the anterior gonopod coxa directed distad in Coxobolellus, or is rounded in Pseudospirobolellus and Benoitolus.
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| Live Siliquobolellus gen. nov. species from Thailand. A, B. Siliquobolellus amicusdraconis gen. et sp. nov. (from Hub Pa Tard), female (paratype, CUMZ-D00149-2); C, D. S. prasankokae gen. et sp. nov. (from Pha Thai), male (holotype, CUMZ-D00148-1). |
Siliquobolellus amicusdraconis gen. et, sp. nov.
Etymology: The species epithet means “friend of the dragon” and refers to the type locality, which is shared with the “shocking pink dragon millipede”, Desmoxytes purpurosea Enghoff, Sutcharit & Panha, 2007.
Diagnosis: Differing from other species in the genus by having the tip of anterior gonopod crossing over with tip of opposite side, the two together delimiting a drop-shaped “window”, whereas in the other two species the tips of anterior gonopod are separated from each other; externally differing by its bright orange color on the anterior and posterior ends. In contrast, S. constrictus gen. et sp. nov. has a row of triangular dark brown spots middorsally on its body rings, while S. prasankokae gen. et sp. nov. has a row of rectangular dark brown spots middorsally on the body rings.
Distribution: Known only from the type locality in Uthaithani Province, Thailand (Fig. 7).
Siliquobolellus constrictus gen. et, sp. nov.
Etymology: The species epithet is a Latin adjective derived from the verb constringere = “to tighten” and refers to the constricted anterior gonopod coxa.
Diagnosis: Differing from other species in the genus by having the anterior gonopod coxae constricted at middle of lateral margin, while the other two species have no constriction at middle of lateral margin of anterior gonopod coxae; externally differing by having a middorsal row of triangular dark brown spots, with dark brown bands on both lateral sides running parallel to the dorsal one.
Distribution: Known only from the type locality in Prachuap Khiri Khan Province, Thailand (Fig. 7).
Siliquobolellus prasankokae gen. et, sp. nov.
Etymology: The species honors Associate Professor Dr. Pongpun Prasankok, biologist and devoted millipede collector.
Diagnosis: Differing from other species in the genus by having the posterior gonopod apically with a short, sharp protrusion; externally differing by having a row of rectangular dark brown spots middorsally on the body rings.
Distribution: Known only from the type locality in Lampang Province, Thailand (Fig. 7).
Piyatida Pimvichai, Henrik Enghoff, Somsak Panha and Thierry Backeljau. 2022. A New Genus of Pseudospirobolellidae (Diplopoda, Spirobolida) from Limestone Karst areas in Thailand, with Descriptions of Three New Species. Zoosystematics and Evolution. 98(2): 313-326. DOI: 10.3897/zse.98.90032
กิ้งกือกระบอกเล็กลายเสือ กิ้งกือสกุลใหม่ของโลก 𝑆𝑖𝑙𝑖𝑞𝑢𝑜𝑏𝑜𝑙𝑒𝑙𝑙𝑢𝑠 Pimvichai et al. 2022
1. 𝑆𝑖𝑙𝑖𝑞𝑢𝑜𝑏𝑜𝑙𝑒𝑙𝑙𝑢𝑠 𝑎𝑚𝑖𝑐𝑢𝑠𝑑𝑟𝑎𝑐𝑜𝑛𝑖𝑠 Pimvichai et al. 2022
กิ้งกือกระบอกเล็กลายเสือสหายมังกร
จากหุบป่าตาด อ.ลานสัก จ.อุทัยธานี
ตั้งชื่อว่า "amicusdraconis" ที่แปลว่า "สหายมังกร" เนื่องจากค้นพบที่หุบป่าตาดที่มีกิ้งกือมังกรสีชมพูอันโด่งดังนั่นเอง
2. 𝑆𝑖𝑙𝑖𝑞𝑢𝑜𝑏𝑜𝑙𝑒𝑙𝑙𝑢𝑠 𝑐𝑜𝑛𝑠𝑡𝑟𝑖𝑐𝑡𝑢𝑠 Pimvichai et al. 2022
กิ้งกือกระบอกเล็กลายเสือคอคอด
จาก อ.กุยบุรี จ.ประจวบคีรีขันธ์
ตั้งชื่อตามลักษณะคอคอดของอวัยวะสืบพันธุ์เพศผู้
3. 𝑆𝑖𝑙𝑖𝑞𝑢𝑜𝑏𝑜𝑙𝑒𝑙𝑙𝑢𝑠 𝑝𝑟𝑎𝑠𝑎𝑛𝑘𝑜𝑘𝑎𝑒 Pimvichai et al. 2022
กิ้งกือกระบอกเล็กลายเสือประสารกก
จากถ้ำผาไท อ.งาว จ.ลำปาง
ตั้งชื่อเป็นเกียรติแด่ รศ. ดร.ผ่องพรรณ ประสารกก อาจารย์สาขาวิชาชีววิทยา สำนักวิชาวิทยาศาสตร์ มหาวิทยาลัยเทคโนโลยีสุรนารี ผู้ร่วมเก็บตัวอย่างกิ้งกือกระบอกเล็กลายเสือสกุลใหม่ดังกล่าว
