Otostigmus telus Chamberlin, 1939

Lewis, John G. E., 2014, A review of the orientalis group of the Otostigmus subgenus Otostigmus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae), Zootaxa 3889 (3), pp. 388-413 : 408-411

Otostigmus telus Chamberlin, 1939

O. telus Chamberlin, 1939 , 4. Pionierbivak, New Guinea [Irian Jaya, Indonesia]. O. telus: Chamberlin: 1944b , 3 (in list).

Description. (From Chamberlin (1939)). Length 48 mm. Antennae with 23 articles, the basal 2.25–2.33 glabrous. Tergites with complete paramedian sutures from 5, marginate from 8, low rounded keels from about 5, with very fine spinules. Ultimate tergite with posterior median depression. Sternites smooth, sternite of ultimate leg-bearing segment narrowed posteriorly, posterior margin “curved”. Coxopleural process with three apical and two lateral spines. No dorsal spine.

Legs 1–19 with two tarsal spurs, 20 with one, 21 with none. Ultimate leg prefemoral spines VL 3, VM 3, DM 1, CS 1.

Remarks. Chamberlin (1939) did not describe the forcipular coxosternal tooth-plates. He stated that it was a species close to O. loriae . It is incompletely described and is thus a nomen dubium. The holotype is in the Bogor Zoological Museum, Java.

1 Forcipular coxosternum with more than 4+4 main teeth....................................................... 2

- Forcipular coxosternum with 3+3 or 4+4 main teeth.......................................................... 5

2 Legs 1–4/5 only with two tarsal spurs. Sternites 11–20 with “scratches” ( Fig. 57 ). 6+6/8 forcipular coxosternal teeth.................................................................................. O. striolatus Peninsular Malaysia

- Legs 1–18 with two tarsal spurs. Sternites without “scratches”.................................................. 3

3 11+9 small forcipular coxosternal teeth. Ultimate leg prefemoral spines VL2, VM2 spines and a corner spine..................................................................................... O. brevidentatus Peninsular Malaysia

- With 6–10 teeth on each coxosternal tooth-plate. Ultimate leg prefemur with (6) 7–12 spines in three or four rows and a corner spine............................................................................................... 4

4 Coxosternal tooth-plates not occupying entire anterior margin of coxosternite (Fig. 43)..... O. multidens multidens SE Asia

- With unusually wide coxosternal tooth-plates occupying entire anterior margin of coxosternite..................................................................................................... O. multidens nordicus Vietnam

5 Antennae of 17 articles................................................................................ 6

- Antennae with more than 17 articles, usually 20–23 but 18 in O. kashmiranus (which has complete sternite paramedian sutures)............................................................................................ 11

6 Forcipular coxosternum with 3+3 main teeth ( Fig. 2 )......................................................... 7

- Forcipular coxosternum with 4+4 main teeth ( Fig. 50 )........................................................ 8

7 A large species, up to 57 mm. Sternites with short anterior paramedian sutures. Sternite of ultimate leg-bearing segment with sides diverging and posterior margin concave................................................. O. ateles Australia

- A smaller species, up to 32 mm. Sternite paramedian sutures almost complete. Sternite of ultimate leg-bearing segment qua- dratic........................................................................... O. australianus Australia (The Malanda spm. of “ O. australianus ” hereabouts.)

8 Tergites without paramedian sutures, coxopleuron with single apical spine............. O. foveolatus Peninsular Malaysia.

- Most sternites with paramedian sutures and coxopleuron with two apical spines.................................... 9

9 Tergites keeled and spined from 5, 6 or 7 in most specimens. Sternite of ultimate leg-bearing segment with rounded sides converging posteriorly, the posterior margin usually rounded. With two tarsal spurs on leg 1 only or none................................................................................................... O. seychellarum Seychelles

- Tergites without keels or spines. Sternite of ultimate leg-bearing segment trapeziform. The posterior margin rounded, straight or concave. Two tarsal spurs on first 3, 4 or 5 pairs of legs.................................................... 10

10 Leg 20 with a tarsal spur, coxopleuron with a lateral spine........................................ O. orientalis India

- Leg 20 without a tarsal spur, coxopleuron without a lateral spine.. O. oatesi Burma and possibly India (requires confirmation).

11 Sternite paramedian sutures complete. Coxopleuron with four apical and one lateral spine........... O. kashmiranus India.

- With short anterior paramedian sutures or none. Coxopleuron with two apical and one lateral spine (three apicals only in O. niasensis )........................................................................................... 12

12 Ultimate leg prefemur with two rows of spines (VM 3, VL 2–3) or three rows, each of two spines, no corner spine. Usually legs 1–17 to 1–19 with two tarsal spurs....................................................... O. ruficeps India.

- Ultimate leg prefemur with three or four rows of spines and a corner spine. First 1–3, 4 or 5 pairs of legs with two tarsal spurs................................................................................................... 13

13 Coxopleuron with three apical spines (no lateral spine). Ultimate leg without a tarsal spur........... O. niasensis Sumatra.

- Coxopleuron with two apical and one lateral spine. Ultimate leg with a tarsal spur................................. 14

14 Sternite of ultimate leg-bearing segment trapezoidal ( Fig.39 ). Tergites generally without spinules................................................................................................... O. metallicus SE Asian Islands.

- Sternite of ultimate leg-bearing segment parallel sided. (Fig. 66). Tergites with spinules................. O. sucki Borneo.

Figures

FIGURES 55 – 62. Otostigmus striolatus. Syntypes. 55. Forcipular coxosternal tooth-plates ZMB spm. 56. Tergite 13 ZMB spm. (detail shown on left side only). 57. Sternite 16 ZMB spm. (partly freehand). 58. Ultimate leg-bearing segment ZMB spm. (detail of pores shown in posterior part of right coxopleuron). 59. Right coxopleural process ZSM spm. 60. Left coxopleural process ZSM spm. 61. Detached ultimate leg ZSM spm. 62. Second detached ultimate leg ZSM spm. FIGURES 63 – 67. Otostigmus sucki Syntypes. 63. Antennal article 3 dorsal spm. 2. 64. Right forcipular trochanteroprefemoral process and coxosternal tooth-plates spm. 3. 65. Ultimate tergite spm. 3. 66. Sternite of ultimate leg-bearing segment and left coxopleural process spm. 3. 67. Right prefemur ultimate leg spm 3 ventral. Scale bars = 1.0 mm except Figs 55, 58, 63 & 64 = 0.5 mm and Figs 59 & 60 = 0.1 mm.

FIGURES 1 – 4. Otostigmus ateles Holotype. 1. Antennal articles 1 – 3 dorsal. 2. Forcipular coxosternal tooth-plates. 3. Sternite 17. 4. Ultimate segments ventral. FIGURES 5 – 11. Otostigmus australianus 5. Sternite 12 Lectotype. 6. Sternite of ultimate leg-bearing segment spm. 2 Belenden Ker (after Lewis, 2003). 7. Sternite of ultimate leg-bearing segment spm. 3 Belenden Ker (after Lewis, 2003). 8. Right forcipular trochanteroprefemoral process and tooth-plates spm. 7 Malanda. 9. Sternite 6 spm. 7 Malanda. 10. Sternite 12 spm. 7 Malanda after (Lewis, 2003). 11. Ultimate segments ventral spm. 7 Malanda. Scale bars = 1.0 mm except Figs 1 & 2 = 0.5 mm.

FIGURES 50 – 53. Otostigmus orientalis. 50. Forcipular coxosternal tooth-plates and right trochanteroprefemoral process syntype spm. 1. 51. Forcipular coxosternal tooth-plates and right trochanteroprefemoral process syntype spm. 2. 52. Sternite of ultimate leg-bearing segment and left coxopleural process syntype spm. 1. 53. Ultimate segments ventral “ O. morsitans ” Madras. FIGURE 54. Otostigmus seychellarum. Ultimate leg-bearing segment ventral (after Lewis, 2007). Scale bars = 1.0 mm.

FIGURES 38 – 40. Otostigmus metallicus Holotype. 38. Left coxosternal tooth-plate and forcipular trochanteroprefemoral process. 39. Ultimate leg-bearing segment ventral (partially obscured). 40. Left ultimate leg prefemur. FIGURES 41 – 44. Otostigmus multidens. 41. Forcipular coxosternal tooth-plates and left trochanteroprefemoral process Krakatau (after Lewis, 1991). 42. Forcipular coxosternal tooth-plates and right trochanteroprefemoral process “ Otostigmus orientale ” Java. 43. Right ultimate leg prefemur “ Otostigmus orientale ” Java. 44. Left ultimate leg prefemur “ Otostigmus orientale ” Java. FIGURES 45 – 49. Otostigmus oatesi Syntypes. 45. Forcipular coxosternal tooth-plates and left trochanteroprefemoral process spm. 3. 46. Ultimate leg-bearing segment ventral spm. 3. (The second spine on the right coxopleuron not visible here. Detail of pores shown in posterior part of the coxopleura). 47. Sternite of ultimate leg-bearing segment spm. 4. 48. Ultimate prefemur (loose leg 1). 49. Ultimate prefemur (loose leg 2). Scale bars = 1.0 mm except Figs 38 & 45 = 0.5 mm and Fig. 41 = 0.25 mm.