Eutrichodesmus Silvestri 1910
Creators: name: Golovatch, Sergei
name: Geoffroy, Jean-Jacques
name: Mauriès, Jean-Paul
name: VandenSpiegel, Didier
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Haplodesmidae
Eutrichodesmus

description: Key to the species of <i>Eutrichodesmus</i> 1 At least some metaterga with an evident mid-dorsal outgrowth or projection (Figs 9 A-D; 20A-D).................................................................................... <b>2</b> – All metaterga subequal, devoid of an evident mid-dorsal outgrowth or projection (Figs 2 A-F, 5A-D; 17A-D)................................................................... <b>9</b> 2 Only last 3-8 metaterga in front of telson with a very evident mid-dorsal outgrowth. Body with 20 segments............................................................. <b>3</b> – Most of metaterga, including some of anterior body portion, with a high, often tuberculated projection (Figs 9 A-D; 20A-D). Body with 19 or 20 segments.......................................................................................................... <b>5</b> 3 Metaterga 12-19 each with an increasingly evident, subtriangular, mid-dorsal outgrowth. Cave in Yunnan Prov., China.......................... <i>E. dorsiangulatus</i> – Only metaterga 16(17)-19 each with an evident, rather rounded, mid-dorsal outgrowth................................................................................................... <b>4</b> 4 Paraterga narrower. Gonopod process dp less than one-quarter length of acropodite. North Vietnam.................................................. <i>E. armatocaudatus</i> – Paraterga broader. Gonopod process dp much longer, more than half length of acropodite. Cave in Yunnan Prov., China.......................... <i>E. monodentus</i> 5 Mid-dorsal projections relatively low, not club-shaped, increasingly evident on metaterga 3–17(18) (Fig. 20A).............................................................. <b>6</b> – Mid-dorsal projections especially prominent, club-shaped, present on metaterga (4)5-19, only slightly lower on metatergum 19........................... <b>7</b> 6 Body with 19 segments. Subtriangular mid-dorsal projections evident on metaterga 3-17, only slightly smaller on metatergum 18 (Fig. 20A). Gonopod process dp rudimentary (Figs 22E, F). Vietnam....... <b> <i>E. asteroides</i> sp. n.</b> – Body with 20 segments. Clearly tridentate mid-dorsal projections evident on metaterga 3-18, abruptly smaller on metatergum 19. Gonopod process dp small but evident. Malaysia.................................................... <i>E. cavernicola</i> 7 Metatergum 4 with a high mid-dorsal projection (Fig. 9A). Paraterga strongly declivous and quadrilobate (Figs 9 A-D, 10E). Gonopods as in Fig. 11. Vietnam........................................................................................ <b> <i>E. aster</i> sp. n.</b> – Mid-dorsal projections absent from metatergum 4. Paraterga less strongly declivous. Gonopods different. Malaysia......................................................... <b>8</b> 8 Mid-dorsal projections on metaterga 5 and 6 straight in lateral view.............................................................................................................. <i>E. macclurei</i> – Mid-dorsal projections on metaterga 5 and 6 slightly inclined anteriorly in lateral view................................................................................ <i>E. reclinatus</i> 9 Body with 19 segments. Collum and metaterga virtually smooth, non-tuberculate, beset with long or short trichome (Fig. 32 A-F, 33C-E). Paraterga too short to allow complete body volvation (Fig. 32A). Gonopod telopodite with a complex, lobiform dp (Fig. 33F, G). Southwestern Pacific...................... <b>10</b> – Body with 20 segments. Collum and metaterga clearly tuberculate, trichome (if present) usually short (Figs 25F, 29F). Paraterga much broader, mostly reaching level of venter, so volvation usually complete. East and Southeast Asia........................................................................................................... <b>11</b> 10 Collum and metaterga beset with long, 2-segmented, tactile setae. Tip of gonopod telopodite without teeth. Vanuatu.......................... <i>E. communicans</i> – Collum and metaterga beset with very short trichome (Figs 32 B-E, 33C-E). Tip of gonopod telopodite with a few teeth (Figs 33F, G). Sulawesi, Indonesia..................................................................................... <b> <i>E. reductus</i> sp. n.</b> 11 Paraterga mostly especially wide and only slightly declivous. Caves in Guangxi Province, China........................................................................................ <b>12</b> – Paraterga not so wide, strongly declivous (Figs 2A, 5A, 13A, 17A, 28A)... <b>13</b> 12 Collum with a row of conspicuous teeth along fore edge of collum..................................................................................................................... <i>E. similis</i> – Collum with only minute teeth at fore edge of collum...................... <i>E. latus</i> 13 Most metaterga with two transverse rows of bosses. Epiproct very strongly flattened dorsoventrally, subquadrate, spatuliform, with unincised margins. Gonopod telopodite particularly slender, about twice as long as coxa. Shikoku, Japan.......................................................................... <i>E. peculiaris</i> – Most metaterga with three transverse rows of bosses or conical tubercles. Epiproct never so strongly flattened. Gonopod telopodite usually shorter. Southeast Asia.................................................................................................... <b>14</b> 14 Paraterga mostly set off laterally at base by a clear sulcus. Metaterga with three mixostictic rows of evident, conical tubercles, each surmounted by a long, 2-segmented seta. Gonopod telopodite with a particularly small, dentiform dp. Thailand.............................................................................. <i>E. gremialis</i> – Paraterga less markedly (if at all) set off laterally at base (Figs 2A, 5A, 13A, 17A, 28A), largely continuing general outline of metaterga or nearly so (Figs 18D, 29C). Metatergal trichome very short or missing. Gonopod telopodite different.................................................................................................... <b>15</b> 15 Paraterga relatively short, volvation apparently imperfect (Fig. 24A). Body small, up to 6.5 mm long. Vietnam.......................................................... <b>16</b> – Paraterga broad enough to allow complete volvation (Figs 17A, 28A). Body usually larger............................................................................................. <b>17</b> 16 Entire body pallid, up to 5.0 mm long. Gonopods simple............. <i>E. basalis</i> – Vertex, collum, metaterga and much of telson grey, this strongly contrasting with pallid venter and legs (Fig. 23). Body 6.0- 6.5 mm long. Gonopods more elaborate (Figs 26 C-E)......................................................... <b> <i>E. griseus</i> sp. n.</b> 17 Pattern of metatergal tuberculation isostictic (Figs 5 A-D). Seminal groove terminating on a very evident, pilose-spiculate pulvillus near base of a relatively shortened, lamellar acropodite (Figs 6F, G, 7 A-F).... <b> <i>E. regularis</i> sp. n.</b> – Metatergal tuberculation mixostictic (Figs 13A-F, 24A). Seminal groove terminating distally to subapically, mostly without a pulvillus (seldom with a hairpad) (Figs 18G, H, 30)....................................................................... <b>18</b> 18 Distofemoral process of gonotelopodite bare, subunciform, pointed......... <b>19</b> – Distofemoral process of gonotelopodite nearly always conspicuously papillate (Figs 18G, H, 30), seldom redumentary (Figs 15A-F), never pointed....... <b>20</b> 19 Body ca 8.0 mm long. Gonopod tip bifid. Vietnam.................. <i>E. demangei</i> – Body ca 14.0 mm long. Gonopod tip simple, unciform. Cave in Yunnan Prov., China............................................................................ <i>E. arcicollaris</i> 20 Paraterga mostly bilobate laterally and unilobate caudolaterally (Fig. 17A). Very small: 4.7-5.3 mm long and 0.65-0.7 mm wide. Gonopods as in Figs 18G, H. Vietnam......................................................... <b> <i>E. curticornis</i> sp. n.</b> – Paraterga mostly 3- or 4-lobate laterally (Figs 13A-D). Length ≥ 6.0 mm, width ≥ 1.1 mm. Gonopods different....................................................... <b>21</b> 21 Metaterga 18 and 19 not elevated dorsally. Caudolateral lobulations mostly deeply incised. Distofemoral process of gonopod bipartite. Caves in Guizhou Prov., China................................................................................... <i>E. incisus</i> – Metaterga 18 and 19 slightly elevated dorsally (Figs 28 A-F). Caudolateral lobulations not incised, tuberculiform. Distofemoral process of gonopod unipartite (Fig. 30)......................................................................................... <b>22</b> 22 Body 6.0- 6.5 mm long and 1.1-1.2 mm wide. Ozopores opening on top of porosteles representing penultimate of five lateral lobulations of respective paraterga, with caudolateral lobulations missing. Gonocoxae with only few macrosetae. Gonopods as in Fig. 30. Laos.................. <b> <i>E. multilobatus</i> sp. n.</b> – Body ≥ 8.0 mm long and 1.35 mm wide. Ozopores opening dorsally on caudalmost of 3-4 lateral lobulations of respective paraterga, caudolateral lobulations present. Gonocoxae with abundant macrosetae. Gonopods different..................................................................................................................... <b>23</b> 23 Body 8.0- 8.5 mm long and 1.35-1.4 mm wide. Paraterga mostly 3-lobate (Figs 2 A-G). Gonopods as in Figs 3 E-H. Cave in Guizhou Prov., China.............................................................................................. <b> <i>E. distinctus</i> sp. n.</b> – Body 12-13 mm long and 2.5-2.6 mm wide. Paraterga mostly 4-lobate (Figs 13A-D). Gonopods as in Figs 15A-F. Caves in Thanh Hoa Prov., Vietnam........................................................................................... <b> <i>E. filisetiger</i> sp. n.</b>
description: Published as part of <i>Golovatch, Sergei, Geoffroy, Jean-Jacques, Mauriès, Jean-Paul &amp; VandenSpiegel, Didier, 2009, Review of the millipede genus Eutrichodesmus Silvestri, 1910 (Diplopoda, Polydesmida, Haplodesmidae), with descriptions of new species, pp. 1-46 in ZooKeys 12 (12)</i> on pages 41-44, DOI: 10.3897/zookeys.12.167, http://zenodo.org/record/576460