I have never looked at this before either! This is a complete guess (which I am not optimistic about) but you could try populating the table.
--
-- PostgreSQL database dump
--
-- Dumped from database version 9.3.5
-- Dumped by pg_dump version 9.3.5
-- Started on 2016-12-14 17:26:14
SET statement_timeout = 0;
SET lock_timeout = 0;
SET client_encoding = 'UTF8';
SET standard_conforming_strings = on;
SET check_function_bodies = false;
SET client_min_messages = warning;
SET search_path = indicia, pg_catalog;
--
-- TOC entry 5120 (class 0 OID 35131)
-- Dependencies: 509
-- Data for Name: taxon_ranks; Type: TABLE DATA; Schema: indicia; Owner: indicia_user
--
INSERT INTO taxon_ranks VALUES (64, 'Unknown', 'Unk', false, 0, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (39, 'Kingdom', 'Kng', false, 10, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (8, 'Subkingdom', 'SubKng', false, 20, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (29, 'Phylum', 'Phl', false, 30, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (11, 'Division', 'Div(b)', false, 30, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (56, 'Subphylum', 'SubPhl', false, 40, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (1, 'Subdivision', 'SubDiv', false, 40, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (106, 'Superclass', 'SupCls', false, 50, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (50, 'Class', 'Cls', false, 60, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (32, 'Subclass', 'SubCls', false, 70, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (37, 'Superorder', 'SupOrd', false, 90, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (73, 'Order', 'Ord', false, 100, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (101, 'Infraorder', 'InfOrd', false, 120, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (108, 'Suborder', 'SubOrd', false, 110, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (116, 'Section', 'Sec(z)', false, 130, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (80, 'Superfamily', 'SupFam', false, 170, '2014-05-09 16:17:17.524', 1, '2014-05-09 16:17:17.524', 1, false);
INSERT INTO taxon_ranks VALUES (25, 'Family', 'Fam', false, 180, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (3, 'Subfamily', 'SubFam', false, 190, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (115, 'Tribe', 'Trb', false, 210, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (69, 'Generic hybrid', 'GenHyb', true, 230, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (57, 'Genus', 'Gen', true, 230, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (59, 'Subgenus', 'SubGen', true, 240, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (14, 'Section', 'Sec(b)', true, 250, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (16, 'Series', 'Ser(b)', true, 270, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (10, 'Species group', 'SppGrp', true, 290, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (38, 'Species aggregate', 'Agg', true, 290, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (26, 'Species', 'Spp', true, 300, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (13, 'Species hybrid', 'SppHyb', true, 300, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (47, 'Subspecies hybrid', 'SubSppHyb', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (2, 'Subspecies', 'SubSpp', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (55, 'Race', 'Rac', true, 350, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (49, 'Form', 'Frm', true, 350, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (44, 'Abberation', 'Abb', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (41, 'Variety', 'Var', true, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (111, 'Infraclass', 'InfCls', false, 80, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (112, 'Subsection', 'SubSec(z)', false, 140, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (31, 'Subseries', 'SubSer(b)', true, 280, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (17, 'Subsection', 'SubSec(b)', true, 260, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (42, 'Microspecies', 'MicSpp', true, 310, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (18, 'Nothosubspecies', 'NoSubSpp', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (21, 'Microgene', 'MicGen', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (22, 'Praespecies', 'PraSpp', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (19, 'Sublusus', 'SubLus', true, 320, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (51, 'Varietal hybrid', 'VarHyb', true, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (7, 'Nothovariety', 'NoVar', true, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (4, 'Cultivar', 'Cult', false, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (33, 'Subvariety', 'SubVar', true, 340, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (74, 'Convariety', 'ConVar', true, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (71, 'Facies', 'Fac', true, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (46, 'Morphotype', 'Mor', true, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (52, 'Form hybrid', 'FrmHyb', true, 350, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (30, 'Forma specialis', 'FrmSpc', true, 350, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (9, 'ecad', 'ecad', false, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (63, 'Subspecies aggregate', 'SubAgg', true, 310, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (43, 'Genus aggregate', 'GenAgg', false, 228, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (98, 'Unranked', 'Unr', false, 0, '2014-05-09 16:17:17.524', 1, '2014-05-09 16:17:17.524', 1, false);
INSERT INTO taxon_ranks VALUES (67, 'Species pro parte', 'SppPP', false, 290, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (15, 'Species sensu lato', 'SppSL', false, 290, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (70, 'Breed', 'Brd', false, 330, '2013-10-23 08:19:49.567', 1, '2013-10-23 08:19:49.567', 1, false);
INSERT INTO taxon_ranks VALUES (100, 'Infrakingdom', 'InfKng', false, 25, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (104, 'Infraphylum', 'InfPhl', false, 45, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (103, 'Parvorder', 'ParOrd', false, 125, '2014-09-23 20:35:20.622', 1, '2014-09-23 20:35:20.622', 1, false);
INSERT INTO taxon_ranks VALUES (127, 'Functional group', 'FunGp', false, 370, '2015-04-03 10:35:21.564', 1, '2015-04-03 10:35:21.564', 1, false);
--
-- TOC entry 5126 (class 0 OID 0)
-- Dependencies: 631
-- Name: taxon_ranks_id_seq; Type: SEQUENCE SET; Schema: indicia; Owner: indicia_user
--
SELECT pg_catalog.setval('taxon_ranks_id_seq', 156, true);
-- Completed on 2016-12-14 17:26:14
--
-- PostgreSQL database dump complete
--